Kymco MO MXer50 Service Manual - chap 03 (manutenzione)

3. INSPECTION/ADJUSTMENT

3-0

MX’er 50

3

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INSPECTION/ADJUSTMENT

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SERVICE INFORMATION -------------------------------------------- 3- 1
MAINTENANCE SCHEDULE ---------------------------------------- 3- 2
FUEL LINE/THROTTLE OPERATION/AIR CLEANER ---------- 3- 3
SPARK PLUG/LUBRICATION SYSTEM---------------------------- 3- 5
CARBURETOR IDLE SPEED ----------------------------------------- 3- 7
CYLINDER COMPRESSION/FINAL REDUCTION GEAR OIL-- 3- 8
DRIVE BELT/BRAKE SHOE/BRAKE SYSTEM ------------------- 3- 9
HEADLIGHT AIM ------------------------------------------------------ 3-11
STEERING SYSTEM INSPECTION --------------------------------- 3-11
TOE-IN ADJUSTMENT------------------------------------------------ 3-12
WHEELS/TIRES -------------------------------------------------------- 3-13
DRIVE CHAIN SLACK ADJUSTMENT ----------------------------- 3-14
CABLE INSPECTION AND LUBRICATION ----------------------- 3-16
FRONT SUSPENSION LUBRICATION------------------------------ 3-16

3

3. INSPECTION/ADJUSTMENT

3-1

MX’er 50

SERVICE INFORMATION

GENERAL

°I WARNING

•Before running the engine, make sure that the working area is well-ventilated. Never run the

engine in a closed area. The exhaust contains poisonous carbon monoxide gas which may cause
death to people.

•Gasoline is extremely flammable and is explosive under some conditions. The working area

must be well-ventilated and do not smoke or allow flames or sparks near the working area or
fuel storage area.

SPECIFICATIONS

ENGINE
Throttle grip free play : 1_ 4mm
Spark plug gap : 0.6_ 0.7mm
Spark plug: Standard : NGK: BR8HAS

Idle speed : 2000±100rpm
Gear oil capacity :
At disassembly : 120cc
At change : 90cc
Cylinder compression : 12kg/cm_
Ignition timing : BTDC 22°/2000rpm

CHASSIS
Front brake free play: 10_ 20mm
Rear brake free play: 10_ 20mm

TIRE PRESSURE

1 Rider

Front

0.35kgf/cm_

Rear

0.35kgf/cm_

TIRE SIZE:
Front : 20*7-8
Rear : 22*10-8

TORQUE VALUES

Front wheel nut 6.0_ 8.0kgf-m
Rear wheel nut 6.0_ 8.0kgf-m

3. INSPECTION/ADJUSTMENT

3-2

MX’er 50

MAINTENANCE SCHEDULE

This chapter includes all information necessary to perform recommended inspections and
adjustments. These preventive maintenance procedures, if followed, will ensure more reliable
vehicle operation and a longer service life. The need for costly overhaul work will be greatly
reduced. This information applies to vehicles already in service ad well as new vehicles that are
being prepared for sale. All service technicians should be familiar with this entire chapter.

Initial

Every

Item

Remarks

1

month

3

month

6

month

6

month

1

year

Spark plug

Check condition. Clean or replace if
necessary.

°≥°≥°≥°≥°≥

Air clearance

Clean. Replace if necessary.

°≥°≥°≥

°≥

Carburetor

Check idle speed/starter operation.
Adjust if necessary.

°≥°≥°≥

°≥

Fuel line

Check fuel hose for cracks or
damage. Replace if necessary.

°≥°≥°≥

Engine oil

Replace (Warm engine before
draining).

°≥°≥°≥

°≥

Engine oil filter

screen

Clean. Replace if necessary.

°≥

°≥

Transmission oil

Check oil leakage. Replace every 12
months.

°≥

°≥

Brake system

Check operation. Adjust if
necessary.

°≥°≥°≥°≥°≥

Drive belt

Check operation/replace if damage
or excessive wear.

°≥

°≥

Wheels

Check balance/damage/runout.
Replace if necessary.

°≥°≥°≥

°≥

Wheel bearings

Check bearings assembly for
looseness/damage. Replace if
damaged.

°≥°≥°≥

°≥

Steering system

Check operation/replace if damage.
Check toe-in/adjust if necessary.

°≥°≥°≥°≥°≥

Knuckle shafts

Lubricate every 6 months.

°≥°≥°≥

Fitting/Fasteners

Check all chassis fittings and
fasteners. Correct if necessary.

°≥°≥°≥°≥°≥

• In the interest of safety, we recommend these items should be serviced only by an

authorized KYMCO motorcycle dealer.

3. INSPECTION/ADJUSTMENT

3-3

MX’er 50

FUEL LINE

Check the fuel tubes and replace any parts,
which show signs of deterioration, damage
or leakage or leakage.

THROTTLE OPERATION

Check the throttle to swing for smooth
movement.
Measure the throttle to swing free play.

Free Play: 1_ 4mm

Minor adjustment is made with the
adjusting nut at the throttle to swing above.
Slide the rubber cover out and adjust by
loosening the lock nut and turning the
adjusting nut.

AIR CLEANER

AIR CLEANER REPLACEMENT

Remove five screws on the air cleaner case
cover and the cover.

Check the element and replace it if it is
excessively dirty or damaged.

Do not smoke or allow flames or sparks
in your working area.

°Ø

Lock Nut

Adjusting Nut

Fuel Filter

Fuel tube

Screws

Air Cleaner Case Cover

3. INSPECTION/ADJUSTMENT

3-4

MX’er 50

CLEAN AIR FILTER ELEMENT

Wash the element gently, but throughly in
solvent.

Squeeze the excess solvent out of the
element and let dry.

Apply the engine oil.
Squeeze out the excess oil.

CHANGE INTERVAL

More frequent replacement is required when
riding in unusually dusty or rainy areas.

Use parts cleaning solvent only. Never
use gasoline or low flash point solvents
which may lead to a fire or explosion.

°Ø

Do not twist or wring out the foam
element. This could damage the foam
material.

°Ø

The element should be wet but not
dripping.

°Ø

Air Cleaner Element

3. INSPECTION/ADJUSTMENT

3-5

MX’er 50

Gap, Wear, and Fouling Deposits

SPARK PLUG

Remove the spark plug
Check the spark plug for wear and fouling
deposits.
Clean any fouling deposits with a spark
plug
cleaner or a wire brush.
Specified Spark Plug: NGK: BR8HAS

Measure the spark plug gap.

Spark Plug Gap: 0.6_ 0.7mm

LUBRICATION SYSTEM

°mOil Filter Cltaning°n
Disconnect the oil tube at the oil pump side
and allow oil to drain into a clean container.
Remove the tube clip at the oil tank side and
disconnect the oil tube.

Remove the oil filter.

Cracks, Damage

Washer Deformation

When installing, first screw in the spark
plug by hand and then tighten it with a
spark plug wrench.

°Ø

Clip

Oil Filter