Aprilia SR 50 2000 Owner's manual
use and maintenance
SR 50
© 1998 aprilia s.p.a. - Noale (VE)
SAFETY WARNINGS
TECHNICAL
First edition: june 2000
Reprint:
Produced and printed by:
C.L.D. s.r.l. editing division
via D. Alighieri, 37/A - 56012 Fornacette (Pisa)
Tel. +39 - (0)587 42 28 00
Fax +39 - (0)587 42 28 01
www.cld.it
E-mail: cld@cld.it
on behalf of:
aprilia s.p.a.
via G. Galilei, 1 - 30033 Noale (VE) - Italia
Tel. +39 - (0)41 58 29 111
Fax +39 - (0)41 44 10 54
www.aprilia.com
use and maintenance SR 50
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The following precautionary warnings are
used throughout this manual in order to convey the following messages:
Safety warning. When you find this
symbol on the vehicle or in the manual,
be careful to the potential risk of personal
injury. Non-compliance with the indications
given in the messages preceded by this symbol may result in grave risks for your and
other people’s safety and for the vehicle!
WARNING
Indicates a potential hazard which may
result in serious injury or even death.
CAUTION
Indicates a potential hazard which may
result in minor personal injury or damage to the vehicle.
NOTE The word “NOTE” in this manual pre-
cedes important information or instructions.
The operations preceded by this symbol must be repeated also on the op-
posite side of the vehicle..
If not expressly indicated otherwise, for the
reassembly of the units repeat the disassembly operations in reverse order.
The terms “right” and “left” are referred to
the rider seated on the vehicle in the normal
riding position.
Any mention to the use of the vehicle with
passenger is to be intended as referred only
to the countries where this is allowed.
WARNINGS - PRECAUTIONS GENERAL ADVICE
Before starting the engine, carefully read this
manual and in particular the section “SAFE
DRIVE”.
Your and other people’s safety depends not
only on your quickness of reflexes and on
your agility, but also on what you know about
the vehicle, on its efficiency and on your
knowledge of the basic information for “SAFE
DRIVE”. Therefore, get a thorough knowledge of the vehicle, in such a way as to be
able to drive in the traffic safely.
NOTE This manual must be considered as
an integral part of the vehicle and must always accompany it, even in case of resale.
aprilia has produced this manual with the
maximum attention, in order to supply the
user with correct and updated information.
However, since aprilia constantly improves
the design of its products, there may be slight
discrepancies between the characteristics of
your vehicle and those described in this
manual. For any clarification concerning the
information contained in this manual, do not
hesitate to contact your aprilia Official
Dealer.
For control and repair operations not expressly described in this publication, for the
purchase of aprilia genuine spare parts,
accessories and other products, as well as
for specific advice, contact exclusively
aprilia Official Dealers and Service Centers,
which guarantee prompt and accurate assistance.
Thank you for choosing aprilia. We wish
you a nice ride.
All rights as to electronic storage, reproduction and total or partial adaptation, with any
means, are reserved for all Countries.
NOTE In some countries the antipollution
and noise regulations in force require periodical inspections.
The user of the vehicle in these countries
must:
– contact an aprilia Authorized Dealer to
have the non-homologated components
replaced with others homologated for use
in the country in question;
– carry out the required periodical inspec-
tions.
NOTE When asking your Dealer for spare
parts, specify the spare parts code indicated
on the SPARE PARTS IDENTIFICATION
LABEL.
Write down the identification code in the
space here below, in order to remember it
also in case of loss or deterioration of the
label.
The label is stuck on the right beam of the
frame; to be able to read it, remove the right
inspection cover, see p. 52 (REMOVING THE
RIGHT AND LEFT INSPECTION COVERS).
In this manual the various versions are indicated by the following symbols:
automatic light switching version
(Automatic Switch-on Device)
optional
Electronic fuel injection
VERSION:
Italy
United Kingdom
Austria
Portugal
Finland
Belgium
Germany
France
Spain
Greece
Holland
Switzerland
Denmark
Japan
Singapore
Poland
Israel
South Korea
Malaysia
Chile
Bermuda
United States
of America
Australia
Brazil
South Africa
New Zealand
Canada
Croatia
Slovenia
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TABLE OF CONTENTS
SAFE DRIVE ................................................... 5
BASIC SAFETY RULES .................................. 6
CLOTHING ...................................................... 9
ACCESSORIES ............................................. 10
LOAD ............................................................. 10
ARRANGEMENT OF THE MAIN ELEMENTS . 12
ARRANGEMENT OF THE INSTRUMENTS/
CONTROLS ...................................................... 14
INSTRUMENTS AND INDICATORS ................ 14
INSTRUMENT AND INDICATOR TABLE ...... 15
INJECTION CHECK WARNING LIGHT 16
MAIN INDIPENDENT CONTROLS .................. 16
CONTROLS ON THE LEFT
SIDE OF THE HANDLEBAR ......................... 16
CONTROLS ON THE RIGHT
SIDE OF THE HANDLEBAR ......................... 17
IGNITION SWITCH ....................................... 18
STEERING LOCK ......................................... 18
AUXILIARY EQUIPMENT ................................ 19
UNLOCKING / LOCKING THE SADDLE ...... 19
CRASH HELMET /
GLOVE COMPARTMENT ............................. 19
ANTI-THEFT HOOK ...................................... 19
BATTERY / TOOL
KIT COMPARTMENT .................................... 20
BAG HOOK ................................................... 20
REAR
MUDGUARD EXTENSION ............................ 20
MAIN COMPONENTS ................................... 20
FUEL ............................................................. 21
LUBRICANTS ................................................ 22
TRANSMISSION OIL .................................... 22
2 STROKE OIL .............................................. 23
BRAKE FLUID - recommendations ............... 24
DISC BRAKES .............................................. 25
COOLANT ..................................................... 26
CHECKING AND TOPPING UP .................... 27
TYRES ........................................................... 28
AUTOMATIC
LIGHT SWITCHING VERSION ............. 29
CATALYTIC SILENCER ................................ 30
EXHAUST SILENCER ................................... 30
INSTRUCTIONS FOR USE .............................. 31
PRELIMINARY CHECKING OPERATIONS .. 31
STARTING..................................................... 32
DEPARTURE AND DRIVE ............................ 34
RUNNING-IN ................................................. 36
STOPPING .................................................... 37
PARKING....................................................... 37
POSITIONING THE
VEHICLE ON THE STAND............................ 38
SUGGESTIONS TO PREVENT THEFT ........ 38
MAINTENANCE ............................................... 39
REGULAR SERVICE INTERVALS CHART .. 40
IDENTIFICATION DATA ................................ 43
AIR CLEANER ............................................... 44
FRONT WHEEL ............................................ 45
REAR WHEEL ............................................... 47
CHECKING THE BRAKE PAD WEAR .......... 48
CHECKING THE STEERING ........................ 49
CHECKING
THE ENGINE FULCRUM AXIS ..................... 49
REMOVING THE
COVER SUPPORT ELEMENT ..................... 50
REMOVING THE FRONT COVER ................ 50
REMOVING THE LOWER
HANDLEBAR COVER ................................... 51
PARTIAL REMOVAL OF THE
UPPER HANDLEBAR COVER ..................... 51
REMOVING THE RIGHT AND
LEFT INSPECTION COVERS ....................... 52
INSTALLING THE REAR
MUDGUARD EXTENSION ............................ 53
REMOVING THE REAR-VIEW MIRRORS ... 53
REMOVING THE FRONT INNER SHIELD ... 54
REMOVING THE REAR
BRAKE CALIPERS ....................................... 55
REMOVING THE REAR
MUDGUARD ................................................. 56
REMOVING THE EXHAUST
SILENCER ..................................................... 56
CHECKING THE SWITCHES ....................... 57
IDLING ADJUSTMENT .................................. 58
ADJUSTING
THE ACCELERATOR CONTROL ................. 58
SPARK PLUG ................................................ 59
BATTERY ...................................................... 60
MAINTENANCE-FREE
BATTERIES ........................................... 60
LONG INACTIVITY OF THE BATTERY ........ 60
CHECKING AND CLEANING
THE TERMINALS .......................................... 61
REMOVING THE BATTERY.......................... 61
INSTALLING THE BATTERY ........................ 62
CHECKING THE ELECTROLYTE
LEVEL (ONLY FOR BATTERIES THAT
NEED MAINTENANCE) ................................ 62
RECHARGING THE BATTERY
(ONLY FOR BATTERIES THAT
NEED MAINTENANCE) ................................ 63
RECHARGING THE BATTERY
(ONLY FOR “MAINTENANCE-FREE”
BATTERIES)................................................. 63
CHANGING THE FUSES .............................. 64
ADJUSTING THE VERTICAL
HEADLIGHT BEAM ....................................... 65
BULBS ........................................................... 65
CHANGING THE HEADLIGHT BULBS ......... 66
CHANGING THE HEADLIGHT
BULBS .......................................... 66
CHANGING THE FRONT DIRECTION
INDICATOR BULBS ...................................... 67
CHANGING THE REAR DIRECTION
INDICATOR BULBS ...................................... 67
CHANGING THE DASHBOARD BULBS ...... 68
CHANGING THE REAR LIGHT BULB .......... 69
CHANGING THE NUMBER PLATE BULB .... 69
TRANSPORT ................................................... 70
DRAINING THE FUEL TANK ........................ 70
CLEANING ....................................................... 71
LONG PERIODS OF INACTIVITY ................ 72
TECHNICAL DATA ........................................... 73
LUBRICANT CHART ..................................... 77
Importers .................................................. 78-79
WIRING DIAGRAM - SR 50 .......................... 80
WIRING DIAGRAM - SR 50 .................. 82
WIRING DIAGRAM - SR 50 .. 84
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safe drive
BASIC SAFETY RULES
To drive the vehicle it is necessary to be in
possession of all the requirements prescribed
by law (driving licence, minimum age, psychophysical ability, insurance, state taxes,
vehicle registration, number plate, etc.).
Gradually get to know the vehicle by driving
it first in areas with low traffic and/or private
areas.
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The use of medicins, alcohol and drugs or
psychotropic substances notably increases
the risk of accidents.
Be sure that you are in good psychophysical
conditions and fit for driving and pay particular attention to physical weariness and drowsiness.
Most road accidents are caused by the driver’s lack of experience.
NEVER lend the vehicle to beginners and,
in any case, make sure that the driver has
all the requirements for driving.
Rigorously observe all road signs and na
tional and local road regulations.
Avoid abrupt movements that can be dangerous for yourself and other people (for
example: rearing up on the back wheel,
speeding, etc.), and give due consideration
to the road surface, visibility and other driving conditions.
Avoid obstacles that could damage the vehicle or make you lose control.
Avoid riding in the slipstream created by preceding vehicles in order to increase your
speed.
Always keep both hands on the handlebars
and both feet on the footboard (or on the footrests), in the correct driving posture.
Avoid standing up or stretching your limbs
while driving.
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OIL
COOLER
The driver should pay attention and avoid
distractions caused by people, things and
movements (never smoke, eat, drink, read,
etc.) while driving.
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Use only the vehicle’s specific fuels and lubricants indicated in the “LUBRICANT
CHART”; check all oil, fuel and coolant levels regularly.
If the vehicle has been involved in an accident, make sure that no damage has occurred to the control levers, pipes, wires,
braking system and vital parts.
If necessary, have the vehicle inspected by
an aprilia Official Dealer, who should care-
fully check the frame, handlebars, suspensions, safety parts and all the devices that
you cannot check by yourself.
Always remember to report any malfunction
to the technicians to help them in their work.
Never use the vehicle when the amount of
damage it has suffered endangers your
safety.
A12
345
ONLY ORIGINALS
Never change the position, inclination or
colour of: number plate, direction indicators,
lights and horns.
Any modification of the vehicle will result in
the invalidity of the guarantee.
Any modification of the engine or of other
members which is aimed at increasing the
speed or the power of the vehicle is prohibited by the law; in fact, any modification resulting in an increase of the maximum speed
or of the engine displacement would change
the scooter into a motorcycle, which implies
the following obligations for the owner:
- new homologation;
- new registration;
- appropriate driving license.
Further, said modifications cause the loss of
the insurance cover, since insurance policies expressly prohibit to make technical
changes aimed at increasing the vehicle
performance levels.
For the reasons stated above, the failure to
comply with the tampering prohibition is punished by law with appropriate sanctions (including the confiscation of the vehicle),
which, according to the case, can be combined with the sanctions provided for not
using the crash helmet and/or the number
plate, for the violation of fiscal obligations
(ownership tax) and with penal sanctions
provided for using the vehicle without driving license.
Never race with other vehicles.
Avoid off-road driving.
CLOTHING
Before starting, always wear a correctly fastened crash helmet. Make sure that it is homologated, in good shape, of the right size
and that the visor is clean.
Wear protective clothing, preferably in light
and/or reflecting colours. In this way you will
make yourself more visible to the other drivers, thus notably reducing the risk of being
knocked down, and you will be more protected in case of fall.
This clothing should be very tight-fitting and
fastened at the wrists and ankles.
Strings, belts and ties should not be hanging loose; prevent these and other objects
from interfering with driving by getting en-
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SR 50
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Do not keep objects that can be dangerous
in case of fall, for example pointed objects
like keys, pens, glass vials etc. in your pockets (the same recommendations also apply
to passengers).
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ACCESSORIES
The owner of the vehicle is responsible for
the choice, installation and use of any accessory.
Avoid installing accessories that cover horns
or lights or that could impair their functions,
limit the suspension stroke and the steering
angle, hamper the operation of the controls
and reduce the distance from the ground and
the angle of inclination in turns.
Avoid using accessories that hamper access
to the controls, since this can prolong reaction times during an emergency.
Big fairings and windshields installed on the
vehicle may produce aerodynamic forces that
affect the stability of the vehicle, especially
when riding at high speed.
Make sure that the equipment is well fastened to the vehicle and not dangerous during driving. Do not install electrical devices
and do not modify those already existing to
avoid electrical overloads, because the vehicle could suddenly stop or there could be
a dangerous current shortage in the horn and
in the lights.
aprilia recommends the use of (aprilia
genuine accessories).
LOAD
Be careful and moderate when loading your
luggage. Keep any luggage loaded as close
as possible to the center of gravity of the
vehicle and distribute the load uniformly on
both sides, in order to reduce imbalance to
the minimum.
Furthermore, make sure that the load is firmly
secured to the vehicle, especially during long
trips.
KG!
Avoid hanging bulky, heavy and/or dangerous objects on the handlebars, mudguards
and forks: the vehicle might respond more
slowly in turns and its manoeuvrability could
be unavoidably impaired.
Do not place bags that are too bulky on the
vehicle sides, because they could hit people
or obstacles, making you lose control of the
vehicle.
Do not carry any bag if it is not tightly secured to the vehicle.
Do not carry bags which protrude too much
from the luggage-rack or which cover the
lights, horn or indicators.
Do not carry animals or children on the glove
compartment or on the luggage-rack.
Do not exceed the maximum load allowed
for each side-bag.
When the vehicle is overloaded, its stability
and its manoeuvrability can be compromised.
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ARRANGEMENT OF THE MAIN ELEMENTS
2
6 87
3
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4
KEY
1) Coolant expansion tank plug
2) Rear brake reservoir
3) Bag hook
4) Battery/tool kit compartment cover
5) Fuse carrier
6) Fuel tank
7) Fuel tank plug
5
13 12111
9
10
8) Saddle lock
9) Passenger left footrest
(in the countries where required)
10) Air cleaner
11) Centre stand
12) Side stand
13) Left inspection cover
2 3
1
6
11
KEY
1) 2 stroke oil tank plug
2) 2 stroke oil tank
3) Crash helmet / glove compartment
4) Ignition switch/steering lock
5) Right inspection cover
6) Front brake reservoir
7) Horn
8) Battery
4
7
5
9 810
9) Spark plug
10) Anti-theft hook (for the aprilia “Body-
Guard” armored cable
11) Passenger right footrest
(in the countries where required)
).
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ARRANGEMENT OF THE INSTRUMENTS / CONTROLS INSTRUMENTS AND INDICATORS
3
2
1 9 8
KEY
1) Electrical controls on the left side of the handlebar
2) Rear brake lever
3) Left rear-view mirror
4) Instruments and indicators
5) Right rear-view mirror
6) Throttle grip
7) Front brake lever
8) Electrical controls on the right side of the handlebar
9) Ignition switch/steering lock (
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- - )
5
2 3
4
1
6
74
KEY
1) Fuel level indicator ( )
2) Speedometer
3) Total kilometres odometer
4) Coolant temperature indicator (
5) Green direction indicator warning light (
6) Red 2 stroke oil reserve warning light (
7) Green low beam warning light (
7a) Blue high beam warning light (
8) Amber low fuel warning light ( )
9) Diagnostic system warning light (INJECTION CHECK)
7a
)
)
)
9
568 7
)
)
INSTRUMENT AND INDICATOR TABLE
Description
Direction indicator warning light (
2 stroke oil reserve warning light ( )
Total kilometres odometer
Speedometer
Low beam warning light (
High beam warning light
( )
Low fuel warning light (
Fuel level indicator (
Coolant
temperature indicator (
Function
)
It blinks when the direction indicators are on.
It comes on with the ignition switch in position ” ”, one brake lever pulled and the start push
button “ “ pressed, thus checking the correct operation of the bulb. If the light does not come
on during the starting, provide for replacing the bulb.
CAUTION
tioning, this means that the 2 stroke oil reserve is being used; in this case, top up the 2
stroke oil tank, see p. 23 (2 STROKE OIL).
It indicates the total number of kilometres covered.
It indicates the driving speed.
)
It comes on when the headlight is in low beam position.
It comes on when the headlight in high beam position.
)
It comes on when the quantity of fuel left in the tank is about 2
It indicates the approximate fuel level in the tank.
)
It indicates the approximate temperature of the coolant in the engine.
When the pointer starts moving beyond the “min” level, the temperature is sufficient for driving
the vehicle. The normal running temperature range is indicated by the central area of the
scale.
)
If the pointer reaches the red area, stop the engine and check the coolant level, see p. 26
(COOLANT).
CAUTION
It lights up for a few seconds when the ignition switch is turned to the “ ” position. If the warning
Diagnostic system warning light
(injection check)
light comes on, follow the instructions given on page 16 (INJECTION CHECK WARNING LIGHT).
CAUTION
If the warning light comes on and does not go out after the start push
button “
” has been released, or if it comes on during normal func-
l.
If the maximum allowed temperature is exceeded (red area “max” of
the scale), the engine may be seriously damaged.
If the light does not go out, the vehicle is malfunctioning. Do not attempt to start it but contact an aprilia dealer.
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PRIORITY NO. 1
The warning light blinks rapidly (2 Hz).
CAUTION
If this happens, a potentially serious breakdown has occurred.
It is strongly recommended that you contact an aprilia Offi-
cial Dealer.
If the vehicle is started, its functionality may be limited.
Stop the vehicle and take it to an aprilia Official Dealer.
MAIN INDIPENDENT CONTROLSINJECTION CHECK WARNING LIGHT
2
PRIORITY NO. 2
The warning lights comes on and stays lit for at least 10 seconds.
CAUTION
This denotes a momentary malfunction that does not affect
the safety of the vehicle. The engine can be started. It is advisable to contact an aprilia Official Dealer as soon as possible.
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1
CONTROLS ON THE LEFT SIDE OF THE HANDLEBAR
NOTE The electrical parts work only when the ignition switch is
in position “
”.
NOTE The lighting system works only when the engine is run-
ning.
1) HORN PUSH BUTTON (
The horn is activated when the push button is pressed.
2) DIRECTION INDICATOR SWITCH (
To indicate the turn to the left, move the switch to the left; to
indicate the turn to the right, move the switch to the right.
To turn off the direction indicator, press the switch.
)
)
CONTROLS ON THE RIGHT SIDE OF THE HANDLEBAR
NOTE The electrical parts work only when the ignition switch is
in position “
”.
NOTE The lighting system works only when the engine is run-
ning.
1) LIGHT SWITCH ( - •) ( not provided)
When the light switch is in position “ • ”, the lights are off; when
the switch is in position “
beam are on.
1a) LIGHT SWITCH (
When the light switch is in position “ • ”, the lights are off; when
the switch is in position “
lights are on; when it is in position “
parking lights are on.
1b)DIMMER SWITCH (
countries where the engine stop switch “
quired)
When the dimmer switch is in position “
the parking lights are on; when it is in position “
beam and the parking lights are on.
”, the rear parking light and the low
- - •)
” the low beam and the parking
” the high beam and the
- ) (not provided for those
- ” is re-
”, the low beam and
”, the high
NOTE The lights can be switched off only by stopping the
engine.
1c) ENGINE STOP SWITCH (
(in the countries where required)
- )
WARNING
Do not operate the engine stop switch “
conditions.
- ” in running
1
1a
1b
1c
2
This is a safety or emergency switch. With the switch in position
”, it is possible to start the engine; the engine can be stopped
“
by moving the switch to position “
”.
CAUTION
With stopped engine and ignition switch in position “ ”, the
battery may run down.
When the vehicle has come to a halt, stop the engine, and
move the ignition switch to position “ ”.
2) START PUSH BUTTON (
When the start push button is pressed and one of the brake
levers (front or rear) is activated at the same time, the starter
makes the engine run.
For the starting procedure, see p. 32 (STARTING).
)
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IGNITION SWITCH
The ignition switch is positioned on the right
side, near the steering column.
NOTE The key (1) operates the igni-tion/
steering lock switch, the battery/tool kit compartment lock and the saddle lock.
Two keys are supplied together with the vehicle (one spare key).
NOTE Do not keep the spare key on the
vehicle.
1
STEERING LOCK
WARNING
Never turn the key to position “ ” in running conditions, in order to avoid losing
control of the vehicle.
OPERATION
To lock the steering:
◆ Turn the handlebar completely leftwards.
◆ Turn the key (1) to position “
press it.
◆ Release the key.
NOTE Turn the key and steer the handle-
bar at the same time.
◆ Rotate the key (1) anticlockwise (leftwards), steer the handlebar slowly until
the key (1) reaches position “
◆ Extract the key.
” and
”.
Position Function
The steering is
locked. It is
neither
Steering
lock
possible to
start the
engine, nor to
switch on the
lights.
Neither the engine, nor the
lights can be
switched on.
The engine can
be started, the
turn indicators,
the horn, the
mixer oil warning light, the reserve fuel
warning light,
the temperature indicator
(only if engine
is hot) and the
fuel gauge are
enabled.
Key
removal
It is possible
to remove the
key.
It is possible
to remove the
key.
It is not
possible to
remove the
key.
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18
AUXILIARY EQUIPMENT
2
1
UNLOCKING / LOCKING THE
SADDLE
To unlock and lift the saddle:
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Insert the key in the saddle lock (1).
◆ Turn the key clockwise and raise the sad-
dle (2).
NOTE Before lowering and locking the sad-
dle, make sure that you have not left the key
in the crash helmet / glove compartment.
◆ To lock the saddle, lower and press it
(without exerting too much pressure),
thus making the lock snap shut.
WARNING
Before leaving, make sure that the saddle is properly locked.
CRASH HELMET /
GLOVE COMPARTMENT
Thanks to the crash helmet/glove compartment, you no longer have to carry the crash
helmet or other objects with you eve-ry time
you park the vehicle. The compartment is
positioned under the saddle.
To reach it:
◆ Raise the saddle (2), see beside (UNLOCKING / LOCKING THE SADDLE).
NOTE Position the helmet with the open-
ing facing downwards, as indicated in the figure.
WARNING
Do not load the crash helmet / glove compartment too much.
Maximum allowed weight: 2.5 kg.
4
3
ANTI-THEFT HOOK
The anti-theft hook (3) is positioned on the
right side of the vehicle, near the rider’s footboard.
To prevent the vehicle from being stolen, it
is advisable to secure it with the aprilia “BodyGuard” armored cable
any aprilia Official Dealer.
(4), available at
WARNING
Do not use the hook to lift the vehicle or
for any purpose other than securing the
vehicle once it has been parked.
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SR 50
19
1
2
3
BATTERY / TOOL
KIT COMPARTMENT
This compartment is positioned in the lower
part of the vehicle, between the footrests.
To reach it, proceed as follows:
◆ Insert the key (1) in the lock.
◆ Rotate the key (1) clockwise, pull it and
remove the cover (2).
The tool kit (3) includes:
- 1 tool case;
- 1 21 mm spark plug socket spanner;
1 16-mm tubular ignition spanner;
-
- 1 socket spanner rod;
- 1 double-ended, cross-/cut headed-
screwdriver type PH size 2;
- 1 screwdriver handle;
- 1 4 mm hexagon spanner.
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4
BAG HOOK
WARNING
Do not hang excessively bulky bags or
parcels to the hook, as this may seriously
compromise the manoeuvrability of the
vehicle or the movement of your feet.
The bag hook (4) is positioned on the front
part of the inner shield.
Max. allowed weight: 1.5 kg.
5
REAR
MUDGUARD EXTENSION
The rear mudguard extension (5) is provided
as standard equipment and can be installed
if the vehicle is used on wet roads, since it
reduces the reach of the water spray caused
by the rear wheel.
NOTE The rear mudguard extension (5),
complete with screws and relevant nuts, is
supplied as standard equipment and is
housed in the crash helmet/glove
compartment.
For the installation, see p. 53 (INSTALLING
THE REAR MUDGUARD EXTENSION).
MAIN COMPONENTS
FUEL
WARNING
The fuel used for internal combustion
engines is extremely inflammable and in
particular conditions it can become explosive.
It is important to carry out the refuelling
and the maintenance operations in a wellventilated area, with the engine off.
Do not smoke while refuelling or near fuel
vapours, in any case avoid any contact
with naked flames, sparks and any other
heat source to prevent the fuel from
catching fire or from exploding.
Further, prevent fuel from flowing out of
the fuel filler, as it could catch fire when
getting in contact with the red-hot surfaces of the engine.
In case some fuel has accidentally been
spilt, make sure that the area is completely dry before starting the vehicle.
Since petrol expands under the heat of
the sun and due to the effects of sun radiation, never fill the tank to the brim.
Screw the cap carefully after refuelling.
Avoid any contact of the fuel with the skin
and the inhalation of vapours; do not
swallow fuel or pour it from a receptacle
into another by means of a tube.
DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.
KEEP AWAY FROM CHILDREN.
Use only unleaded petrol, in conformity with
the DIN 51607 standard, min. O.N. 95
(N.O.R.M.) and 85 (N.O.M.M.).
To refuel, proceed as follows:
◆ Lift the saddle, see p. 19 (UNLOCKING /
LOCKING THE SADDLE).
1
◆ Unscrew and remove the fuel tank plug
(1).
FUEL TANK CAPACITY
(reserve included): 8
TANK RESERVE: 2 l
l
CAUTION
Do not put additives or other substances
into the fuel.
If you use a funnel or other similar items,
make sure that they are perfectly clean.
◆ Refuel.
◆ Put back the cap (1).
WARNING
Make sure that the filler cap is well tightened.
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LUBRICANTS
WARNING
Oil can cause serious damage to the skin
if handled every day and for long periods.
Wash your hands carefully after using oil.
In case any maintenance operation has
to be carried out, it is advisable to use
latex gloves.
KEEP AWAY FROM CHILDREN.
DO NOT DISPOSE OF OIL IN THE ENVIRONMENT.
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CAUTION
Proceed with care.
Do not spill the oil!
Take care not to smear any component,
the area in which you are working and the
surrounding area.
Carefully remove any trace of oil.
CAUTION
In case of leakages or malfunctions, contact an aprilia Official Dealer.
TRANSMISSION OIL
Have the transmission oil level checked
every 4000 km (2500 mi), or every 6 months.
It is necessary to have the transmission oil
changed after the first 500 km (312 mi) and
successively every 12000 km (7500 mi), or
every 2 years.
To check the oil level and to change the oil,
contact an aprilia Official Dealer.
1
2 STROKE OIL
Top up the 2 stroke oil tank every 500 km
(312 mi),
The vehicle is provided with a separate mixer
that makes it possible to mix petrol with oil
for the lubrication of the engine, p. 77 (LUBRICANT CHART).
The vehicle is equipped with a control
unit which supplies the right quantity of oil
for engine lubrication through an electronic
pump (see “LUBRICANT CHART” on page
77).
The reserve is indicated by the coming on of
the 2 stroke oil reserve warning light “
positioned on the dashboard, see p. 14 and
15 (INSTRUMENTS AND INDICATORS).
2000 km (1240 mi).
The use of the vehicle without 2 stroke
oil causes serious damages to the engine.
If you run out of oil in the 2 stroke oil tank
or if the 2 stroke oil pipe has been removed, it is necessary to contact an
aprilia Official Dealer, who will provide
for bleeding the system.
This operation is indispensable, since the
operation of the engine with air in the 2
stroke oil system may cause serious damages to the engine itself.
To top up the 2 stroke oil tank, proceed
as follows:
◆ Lift the saddle, see p. 19 (UNLOCKING /
LOCKING THE SADDLE).
◆ Remove the plug (1).
2 STROKE OIL TANK CAPACITY: 1.6
TANK RESERVE: 0.5 l
CAUTION
Do not put additives or other substances
into the oil.
If a funnel or other system is used for topping up, make sure that it is perfectly
”
clean.
CAUTION
◆ Top up the 2 stroke oil tank.
◆ Put back the cap (1).
CAUTION
Make sure that the filler cap is well
l
tightened.
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BRAKE FLUID - recommendations
WARNING
Sudden resistance or clearance problems
on the brake lever may be due to troubles in the hydraulic system.
For any doubt regarding the perfect functioning of the braking system and in case
you are not able to carry out the usual
checking operations, contact your aprilia
Official Dealer.
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WARNING
Pay special attention to the brake disc and
friction material, making sure that they are
neither dirty nor oily, especially after
maintenance operations or inspections.
Make sure that the brake pipe is neither
twisted nor worn out.
KEEP AWAY FROM CHILDREN.
DO NOT DISPOSE OF THE FLUID IN THE
ENVIRONMENT.
DISC BRAKES
WARNING
The brakes are the parts that most ensure
your safety and for this reason they must
always be perfectly working; check them
before every trip.
A dirty disc soils the pads, with consequent reduction of the braking efficiency.
Dirty pads must be replaced, while dirty
discs must be cleaned with a high-quality degreaser.
The brake fluid must be changed every
two years by an aprilia Official Dealer.
For any doubt regarding the perfect functioning of the braking system and in case
you are not able to carry out the usual
checking operations, contact your aprilia
Official Dealer.
NOTE This vehicle is provided with front
and rear disc brakes, with separate hydraulic circuits.
The following information refers to a single
braking system, but is valid for both.
When the disc pads wear out, the brake fluid
level in the reservoir decreases to automatically compensate for their wear.
1
2
The brake reservoirs are positioned under
the handlebar cover, near the brake lever
couplings.
Periodically check the brake fluid level in the
reservoirs, see below (CHECKING) and the
wear of the pads, see p. 48 (CHECKING THE
BRAKE PAD WEAR).
WARNING
Do not use the vehicle if the braking system leaks fluid.
CHECKING
To check the brake fluid level, proceed as
follows:
MIN = minimum level.
◆ Position the vehicle on the centre stand,
see p. 38 (POSITIONING THE VEHICLE
ON THE STAND).
◆ Rotate the handlebar, so that the fluid contained in the brake reservoir (1) is parallel
to the “MIN” mark stamped on the glass
gauge (2).
◆ Make sure that the fluid (1) contained in
the reservoir exceeds the “MIN” mark
stamped on the glass gauge (2).
If the fluid does not reach at least the “MIN”
mark:
WARNING
Do not use the vehicle if the fluid does
not reach at least the ”MIN” mark.
CAUTION
When the disc pads wear out, the level of
the fluid decreases progressively to compensate for their wear.
◆ Check the brake pad wear, see p. 48
(CHECKING THE BRAKE PAD WEAR)
and the disc wear.
If the pads and / or the disc do not need replacing:
◆ Contact an aprilia Official Dealer, who
will provide for topping up.
CAUTION
Check the braking efficiency.
In case of excessive stroke of the brake
lever or reduced efficiency of the braking
system, contact an aprilia Official Dealer,
since it may be necessary to bleed the
system.
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COOLANT
CAUTION
Do not use the vehicle if the coolant is
below the minimum prescribed level
“MIN”.
Check the coolant level every 2000 km (1250
mi) and after long trips; have the coolant
changed by an aprilia Official Dealer every
2 years.
WARNING
The coolant is noxious: do not swallow
it; if the coolant gets in contact with the
skin or the eyes, it can cause serious irritations. If the coolant gets in contact
with your skin or eyes, rinse with plenty
of water and consult a doctor. If it is swallowed, induce vomit, rinse mouth and
throat with plenty of water and consult a
doc-tor without delay.
DO NOT DISPOSE OF THE FLUID IN THE
ENVIRONMENT.
KEEP AWAY FROM CHILDREN.
Be careful not to spill the coolant on the
red-hot parts of the engine: it may catch
fire and send out invisible flames.
In case maintenance operations are to be
performed, it is advisable to use latex
gloves.
CAUTION
Have the coolant changed by an aprilia
Official Dealer.
The coolant is made up of 50% water and
50% antifreeze.
This mixture is ideal for most running temperatures and ensures good protection
against corrosion.
It is advisable to keep the same mixture also
in the hot season, since in this way losses
due to evaporation are reduced and it is not
necessary to top up very frequently.
The mineral salt deposits left in the radiator
by evaporated water are thus reduced and
the efficiency of the cooling system remains
unchanged.
1
If the outdoor temperature is below 0°C,
check the cooling circuit frequently and if necessary increase the antifreeze concentration
(up to maximum 60%).
For the cooling solution use distilled water,
in order not to damage the engine.
WARNING
Do not remove the expansion tank cap
(1) when the engine is hot, since the coolant is under pressure and its temperature
is high.
If it gets in contact with the skin or with
clothes it may cause severe burns and/
or damage.
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1
1
2
CHECKING AND TOPPING UP
WARNING
Check the coolant level and top up the
expansion tank with cold engine.
◆ Stop the engine and wait until it has cooled
down.
NOTE Position the vehicle on firm and flat
ground.
◆ Remove the front cover, see p. 50 (REMOVING THE FRONT COVER).
◆ Make sure that the level of the fluid contained in the expansion tank (2) is included
between the “MIN” and “MAX” marks.
MIN = minimum level.
MAX= maximum level.
If not, proceed as follows:
Loosen the filling cap (1) without removing it (give it half turn anticlockwise).
Wait a few seconds in order to release any
residual pressure.
Unscrew and remove the cap (1).
WARNING
The coolant is noxious: do not swallow
it; if the coolant gets in contact with the
skin or the eyes, it can cause serious irritations.
Do not use your fingers or any other object to check if there is enough coolant.
CAUTION
Do not put additives or other subtances
into the fluid.
If you use a funnel or other similar items,
make sure that they are perfectly clean.
CAUTION
While topping up, never exceed the
“MAX” level, otherwise the fluid will flow
out of the tank while the engine is running.
◆ Top up with coolant, see p. 77 (LUBRICANT CHART) until reaching approx. the
“MAX” notch.
◆ Put back the filling cap (1).
CAUTION
In case of excessive consumption of coolant and in case the tank remains empty,
make sure that there are no leaks in the
circuit. Have it repaired by an aprilia Of-
ficial Dealer.
◆ Put back the front cover, see p. 50
(REMOVING THE FRONT COVER).
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SR 50
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TYRES
This vehicle is provided with tubeless tyres.
WARNING
Periodically check the tyre inflation pressure at room temperature, see p. 73
(TECHNICAL DATA).
If the tyres are hot, the measurement is
not correct. Carry out the measurement
especially before and after long rides.
If the inflation pressure is too high, the
ground unevenness cannot be dampened
and is therefore transmitted to the handlebar, thus compromising the driving
comfort and reducing road holding during turns.
If, on the contrary, the inflation pressure
is too low, the tyre sides (1) are under
greater stress and the tyre itself may slip
on the rim or it may become loose, with
consequent loss of control of the vehicle.
In case of sudden braking the tyres could
even get out of the rims. Further, the vehicle could skid while turning.
Check the surface and the wear of the
tyres, since tyres in bad conditions can
impair both the grip and the controllability of the vehicle.
Some types of tyres homologated for this
vehicle are provided with wear indicators.
There are several kinds of wear indicators.
For more information on how to check the
wear, contact your Dealer.
Visually check if the tyres are worn and
in this case have them changed.
If the tyres are old, even if not completely
worn out, they may become hard and may
not ensure good road holding.
In this case, have the tyres changed.
Change the tyre when it is worn out or in
case of puncture on the tread side, if the
puncture is larger than 5 mm.
After repairing a tyre, have the wheels balanced.
The tyres must be replaced with other
tyres of the type and model recommended
by the manufacturer, see p. 73 (TECHNICAL DATA); the use of tyres different from
those prescribed may adversely affect the
manoeuvrability of the vehicle.
Do not install tyres with air tube on rims
for tubeless tyres and viceversa.
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2
3
Make sure that the tyres always have their
valve sealing (2) caps on, to prevent them
from suddenly going flat.
Change, repair, maintenance and balancing operations are very important and
should be carried out by qualified technicians with appropriate tools.
For this reason, it is advisable to have the
above mentioned operations carried out
by an aprilia Official Dealer or by a qualified tyre repairer.
If the tyres are new, they may still be covered with a slippery film: drive carefully
for the first miles. Do not oil the tyres with
unsuitable fluids.
MINIMUM TREAD DEPTH LIMIT (3)
front: .............................................. 1,5 mm
rear: ............................................... 1,5 mm
However, the minimum tread depth must not
be less than prescribed by regulations in
force in the country where the vehicle is used.
AUTOMATIC
LIGHT SWITCHING VERSION
The vehicles provided with the Automatic
Switch-on Device can be immediately recognized, since the lights come automatically
on as soon as the engine is started.
For this reason the light switch has been replaced with a dimmer switch “
The lights can be switched off only by stopping the engine.
◆ Before starting the vehicle, make sure that
the dimmer switch is in position “
low beam).
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SR 50
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