Yamaha YFM350 User Manual

YFM350S

3GD-AE7

SUPPLEMENTARY SERVICE MANUAL

FOREWORD

This Supplementary Service Manual has been prepared to introduce new service and data for the YFM350S. For complete service information procedures it is necessary to use this Supplementary Service Manual together with the following manual.

YFM350X(J) ’97 SERVICE MANUAL: 3GD-AE5

YFM350X(P) 2002 SUPPLEMENTARY SERVICE MANUAL: 3GD-AE6

YFM350S

SUPPLEMENTARY

SERVICE MANUAL ©2004 by Yamaha Motor Co., Ltd.

First edition, January 2004 All rights reserved.

Any reproduction or unauthorized use without the written permission of Yamaha Motor Co., Ltd.

is expressly prohibited.

EBS00002

NOTICE

This manual was produced by the Yamaha Motor Company primarily for use by Yamaha dealers and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one manual, so it is assumed that anyone who uses this book to perform maintenance and repairs on Yamaha machine has a basic understanding of the mechanical ideas and the procedures of machine repair. Repairs attempted by anyone without this knowledge are likely to render the machine unsafe and unfit for use.

Yamaha Motor Company, Ltd. is continually striving to improve all its models. Modifications and significant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and will appear in future editions of this manual where applicable.

NOTE:

Designs and specifications are subject to change without notice.

EBS00003

IMPORTANT INFORMATION

Particularly important information is distinguished in this manual by the following notations.

WARNING

CAUTION:

NOTE:

The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!

Failure to follow WARNING instructions could result in severe injury or death to the machine operator, a bystander or a person checking or repairing the machine.

A CAUTION indicates special precautions that must be taken to avoid damage to the machine.

A NOTE provides key information to make procedures easier or clearer.

EBS00004

HOW TO USE THIS MANUAL

MANUAL ORGANIZATION

This manual consists of chapters for the main categories of subjects. (See “symbols”)

1st title 1: This is the title of the chapter with its symbol in the upper right corner of each page. 2nd title 2: This title indicates the section of the chapter and only appears on the first page of each section. It is located in the upper left corner of the page.

3rd title 3: This title indicates a sub-section that is followed by step-by-step procedures accompanied by corresponding illustrations.

EXPLODED DIAGRAMS

To help identify parts and clarify procedure steps, there are exploded diagrams at the start of each removal and disassembly section.

1.An easy-to-see exploded diagram 4 is provided for removal and disassembly jobs.

2.Numbers 5 are given in the order of the jobs in the exploded diagram. A number that is enclosed by a circle indicates a disassembly step.

3.An explanation of jobs and notes is presented in an easy-to-read way by the use of symbol marks 6. The meanings of the symbol marks are given on the next page.

4.A job instruction chart 7 accompanies the exploded diagram, providing the order of jobs, names of parts, notes in jobs, etc.

5.For jobs requiring more information, the step-by-step format supplements 8 are given in addition to the exploded diagram and the job instruction chart.

1 2

GEN

INFO SPEC

3

4

CHK

ENG

ADJ

 

5 6

CARB CHAS

7 8

ELEC

+

TRBL

 

 

SHTG

9 0

A B

T .

R .

C D

E

F G H

E G M

I J K L

B

LS

M

S

M N

New

LT

EB003000

ILLUSTRATED SYMBOLS

Illustrated symbols 1 to 8 are printed on the top right of each page and indicate the subject of each chapter.

1 General information

2Specifications

3Periodic checks and adjustments

4Engine

5Carburetion

6Chassis

7Electrical

8Troubleshooting

Illustrated symbols 9 to E are used to identify the specifications appearing in the text.

9 Filling fluid

0 Lubricant A Special tool

BTorque

CWear limit, clearance

DEngine speed

EΩ, V, A

Illustrated symbols F to L in the exploded diagrams indicate the types of lubricants and lubrication points.

F Apply engine oil G Apply gear oil

H Apply molybdenum disulfide oil I Apply wheel bearing grease

J Apply lightweight lithium soap base grease K Apply molybdenum disulfide grease

L Apply silicon grease

Illustrated symbols M to N in the exploded diagrams indicate where to apply a locking agent M and when to install a new part N.

MApply the locking agent (LOCTITE®)

NReplace

CONTENTS

 

GENERAL INFORMATION ................................................................................

1

MACHINE IDENTIFICATION .......................................................................

1

MODEL LABEL ......................................................................................

1

SPECIAL TOOLS .........................................................................................

2

SPECIFICATIONS ..............................................................................................

3

GENERAL SPECIFICATIONS .....................................................................

3

MAINTENANCE SPECIFICATIONS ............................................................

5

ENGINE .................................................................................................

5

CHASSIS ...............................................................................................

7

ELECTRICAL .......................................................................................

10

CABLE ROUTING ......................................................................................

11

PERIODIC CHECKS AND ADJUSTMENTS....................................................

23

INTRODUCTION ........................................................................................

23

PERIODIC MAINTENANCE/LUBRICATION..............................................

23

SEAT, FENDERS AND FUEL TANK..........................................................

25

SEAT, SIDE COVERS, AND FRONT PANEL .....................................

25

FOOT PROTECTORS, ENGINE SKID PLATE,

 

AND FRONT BUMPER.......................................................................

26

HEADLIGHTS AND FRONT FENDER ................................................

27

REAR FENDER ...................................................................................

28

FUEL TANK .........................................................................................

30

CHASSIS....................................................................................................

32

CHECKING THE FRONT BRAKE PADS.............................................

32

ADJUSTING THE PARKING BRAKE ..................................................

32

ADJUSTING THE REAR SHOCK ABSORBER...................................

33

ELECTRICAL SYSTEM..............................................................................

35

CHECKING AND CHARGING THE BATTERY ...................................

35

ADJUSTING THE HEADLIGHT BEAMS .............................................

40

REPLACING A HEADLIGHT BULB .....................................................

41

ENGINE ............................................................................................................

42

ENGINE REMOVAL ...................................................................................

42

INSTALLING THE ENGINE .................................................................

42

CLUTCH .....................................................................................................

43

INSTALLING THE RIGHT CRANKCASE COVER...............................

43

CARBURETOR.................................................................................................

44

CARBURETOR ..........................................................................................

44

CHASSIS ..........................................................................................................

47

REAR WHEELS AND REAR AXLE HUB ...................................................

47

REMOVING THE REAR AXLE ............................................................

49

INSTALLING THE REAR AXLE...........................................................

50

FRONT ARMS AND FRONT SHOCK ABSORBER ...................................

51

REAR BRAKE ............................................................................................

53

ASSEMBLING THE REAR BRAKE CALIPER .....................................

53

REAR SHOCK ABSORBER AND SWINGARM .........................................

54

HANDLING THE REAR SHOCK ABSORBER

 

AND GAS CYLINDER.........................................................................

56

DISPOSING OF THE REAR SHOCK ABSORBER

 

AND GAS CYLINDER.........................................................................

56

ELECTRICAL ...................................................................................................

57

ELECTRICAL COMPONENTS...................................................................

57

YFM350S WIRING DIAGRAM

 

GEN

MACHINE IDENTIFICATION INFO

GENERAL INFORMATION

MACHINE IDENTIFICATION

MODEL LABEL

The model label 1 is affixed to the frame. This information will be needed to order spare parts.

– 1 –

SPECIAL TOOLS

EB102001

SPECIAL TOOLS

GEN INFO

The following special tools are necessary for complete and accurate tune-up and assembly. Use only the appropriate special tools; this will help prevent damage caused by the use of inappropriate tools or improvised techniques. Special tools may differ by shape and part number from country to country. In such a case, two types are provided.

When placing an order, refer to the list provided below to avoid any mistakes.

For US and CDN

P/N. YM-, YU-, YS-, YK-, ACC-

Except for US and CDN

P/N. 90890-

Tool No.

Tool name/How to use

Illustration

 

 

 

 

 

Steering nut wrench

 

 

90890-01443

 

 

 

YU-33975

 

 

 

 

This tool is needed to loosen and tighten

 

 

 

the rear shock absorber locknut.

 

 

 

 

 

 

 

Axle nut wrench (46 mm)

 

 

90890-01498

 

 

 

YM-37134

 

 

 

 

This tool is needed to loosen or tighten

 

 

 

the rear axle nut.

 

 

 

 

 

 

– 2 –

 

 

 

 

 

 

 

GENERAL SPECIFICATIONS

 

SPEC

 

 

 

 

 

 

 

 

SPECIFICATIONS

GENERAL SPECIFICATIONS

 

 

 

Model

 

YFM350S

 

 

 

Model code number

 

5YT1 (For USA and Oceania)

 

 

5YT2 (For CDN)

 

 

5YT3 (For Europe)

 

 

 

 

 

 

Dimensions

 

 

 

 

 

Overall length

 

1,770 mm (69.7 in)

Overall width

 

1,095 mm (43.1 in)

Overall height

 

1,080 mm (42.5 in)

Seat height

 

820 mm (32.3 in)

Wheelbase

 

1,210 mm (47.6 in)

Minimum ground clearance

 

115 mm (4.53 in)

 

 

 

 

 

 

Basic weight

 

 

 

 

 

With oil and full fuel tank

 

180.0 kg (397 lb)

 

 

 

Minimum turning radius

 

3,100 mm (122 in)

 

 

 

 

 

 

Engine

 

 

 

 

 

Engine type

 

Air-cooled 4-stroke, SOHC

Cylinder arrangement

 

Forward-inclined single cylinder

Displacement

 

349.0 cm3 (21.30 cu.in)

Bore × stroke

 

83.0 × 64.5 mm (3.27 × 2.54 in)

Compression ratio

 

9.20 : 1

 

 

 

Compression pressure

 

850 kPa (8.5 kg/cm2, 120.9 psi) at 350 r/min

Starting system

 

Electric starter

 

 

 

 

 

 

Oil capacity

 

 

 

 

 

Engine oil

 

 

 

 

 

Periodic oil change

 

2.50 L (2.20 Imp qt, 2.64 US qt)

With oil filter replacement

 

2.60 L (2.29 Imp qt, 2.75 US qt)

Total amount

 

3.20 L (2.82 Imp qt, 3.38 US qt)

 

 

 

 

 

 

Fuel

 

 

 

 

 

Type

 

Regular unleaded gasoline only

 

 

(For CDN and Europe)

 

 

Unleaded gasoline only (For USA and Oceania)

Tank capacity

 

9.0 L (1.98 Imp gal, 2.38 US gal)

Reserve amount

 

2.7 L (0.59 Imp gal, 0.71 US gal)

 

 

 

 

 

 

Carburetor

 

 

 

 

 

Type/manufacturer

 

BSR36/MIKUNI

 

 

 

 

 

 

– 3 –

 

 

 

 

 

 

 

GENERAL SPECIFICATIONS

 

SPEC

 

 

 

 

 

 

 

 

 

 

Model

 

YFM350S

 

 

 

 

 

 

Transmission

 

 

 

 

 

Primary reduction system

 

Spur gear

Primary reduction ratio

 

76/24 (3.167)

 

 

 

Secondary reduction system

 

Chain drive

Secondary reduction ratio

 

38/13 (2.923)

 

 

 

Transmission type

 

Constant mesh, 6-speed forward, 1-speed

 

 

reverse

Operation

 

Left foot operation

Gear ratio

1st

36/16 × 20/27 × 29/18 (2.685)

 

 

2nd

33/20 × 20/27 × 29/18 (1.969)

 

 

3rd

29/23 × 20/27 × 29/18 (1.504)

 

 

4th

27/26 × 20/27 × 29/18 (1.239)

 

 

5th

25/28 × 20/27 × 29/18 (1.066)

 

 

6th

23/29 × 20/27 × 29/18 (0.946)

 

 

Reverse

33/16 × 33/10 (6.806)

 

 

 

 

 

 

 

 

 

Chassis

 

 

 

 

 

Frame type

 

Steel tube frame

Caster angle

 

 

 

 

Trail

 

26.0 mm (1.02 in)

Toe-in (unloaded)

 

20 ~ 30 mm (0.79 ~ 1.18 in)

 

 

 

 

 

 

Tires

 

 

 

 

 

Type

 

Tubeless

Size

front

AT21 × 7-10

 

rear

AT20 × 10-9

Manufacturer

front

DUNLOP

 

rear

DUNLOP

Type

front

KT851B

 

rear

KT877A

 

 

 

 

 

 

Brakes

 

 

 

 

 

Front brake

type

Dual disc brake

 

operation

Right hand operation

Rear brake

type

Single disc brake

 

operation

Right foot operation

 

 

 

 

 

 

Electrical

 

 

 

 

 

Ignition system

 

DC C.D.I.

Generator system

 

A.C. magneto

Battery voltage/capacity

 

12 V/8.6 Ah

Battery type

 

YTZ10S

 

 

 

 

 

 

Bulb wattage × quantity

 

 

 

 

 

Headlight

 

12 V 30 W/30 W × 2

Tail/brake light

 

12 V 5 W/21 W × 1

Neutral indicator light

 

12 V 1.7 W × 1

Reverse indicator light

 

12 V 1.7 W × 1

– 4 –

MAINTENANCE SPECIFICATIONS SPEC

MAINTENANCE SPECIFICATIONS

ENGINE

Model

 

YFM350S

 

 

 

Rocker arm/rocker arm shaft

 

 

Rocker arm inside diameter

 

11.980 ~ 11.998 mm (0.4717 ~ 0.4724 in)

Rocker arm shaft outside diameter

 

11.961 ~ 11.971 mm (0.4709 ~ 0.4713 in)

Rocker-arm-to-rocker-arm-shaft clearance

0.009 ~ 0.037 mm (0.0004 ~ 0.0015 in)

 

 

 

Carburetor

 

 

I.D. mark

 

5YT1 00

Main jet

(M.J)

#142.5

Main air jet

(M.A.J)

#35

Jet needle

(J.N)

5JFC39-2

Needle jet

(N.J)

P-0M

Pilot jet

(P.J)

#22.5

Pilot air jet

(P.A.J.1)

#65

 

(P.A.J.2)

#165

Pilot outlet

(P.O)

1

Bypass 1

(B.P.1)

0.8

Bypass 2

(B.P.2)

0.8

Bypass 3

(B.P.3)

0.8

Pilot screw turns out

(P.S)

2-1/4 (For CDN, Europe, and Oceania)

Valve seat

(V.S)

2.5

Starter jet

(G.S)

#70

Throttle valve size

(Th.V)

#105

Fuel level

(F.L)

4 ~ 5 mm (0.16 ~ 0.20 in)

 

 

Above the float chamber mating surface

Float height

 

13.0 mm (0.51 in)

Engine idling speed

 

1,450 ~ 1,550 r/min

Intake vacuum

 

33.3 kPa (250 mmHg, 9.83 inHg)

 

 

 

– 5 –

 

 

 

 

 

 

 

 

 

 

MAINTENANCE SPECIFICATIONS

 

SPEC

 

 

 

 

 

 

 

 

 

 

 

Tightening torques

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part to be tightened

Part name

Thread

Q’ty

Tightening torque

Remarks

 

 

 

 

size

Nm

m · kg

 

ft · lb

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Carburetor joint

Bolt

M8

2

20

2.0

14

 

 

Carburetor clamp (cylinder head side)

Screw

M4

1

3

0.3

2.2

 

 

Carburetor clamp (air filter case side)

Screw

M4

1

3

0.3

2.2

 

 

Air filter case

Screw

M4

1

3

0.3

2.2

 

 

Muffler and exhaust pipe

Bolt

M8

1

16

1.6

11

 

 

Muffler

Bolt

M8

2

34

3.4

24

 

 

Clutch cable holder

Bolt

M8

1

16

1.6

11

 

 

Right crankcase cover

Bolt

M6

15

10

1.0

7.2

 

 

Left crankcase cover

Bolt

M6

9

11

1.1

8.0

 

 

Crankshaft end cover

Bolt

M6

4

7

0.7

5.1

 

 

Bearing retainer (balancer shaft)

Screw

M6

2

7

0.7

5.1

 

 

Bearing retainer (main axle)

Screw

M6

2

7

0.7

5.1

 

 

Bearing retainer (left crankcase)

Screw

M5

2

7

0.7

5.1

 

 

Drive sprocket

Nut

M20

1

90

9.0

65

Use a lock

washer.

 

 

 

 

 

 

 

 

Stopper lever

Bolt

M6

1

10

1.0

7.2

 

 

Reverse shift cam stopper bolt

Bolt

M14

1

18

1.8

13

 

 

Drive select lever assembly

Bolt

M8

2

20

2.0

14

 

 

Drive select lever shift rod and

Bolt

M6

1

16

1.6

11

 

 

reverse shift cam

 

 

 

 

 

 

 

 

 

 

 

Shift rod (shift pedal) locknut

Nut

M6

2

8

0.8

5.8

 

 

 

 

 

 

 

 

 

 

 

 

– 6 –

 

 

 

 

 

 

MAINTENANCE SPECIFICATIONS

 

SPEC

 

 

 

 

 

 

 

CHASSIS

 

 

 

 

 

 

 

 

 

 

 

 

 

Model

 

YFM350S

 

 

 

 

 

 

Steering system

 

 

 

 

 

Lock-to-lock angle

 

 

 

 

 

Left

 

42.5°

 

 

 

Right

 

42.5°

 

 

 

 

 

 

 

 

 

Front suspension

 

 

 

 

 

Shock absorber stroke

 

90.0 mm (3.54 in)

Shock absorber spring free length

 

232.5 mm (9.15 in)

Spring rate

(K1)

32.00 N/mm (3.26 kg/mm, 182.72 lb/in)

 

(K2)

45.00 N/mm (4.59 kg/mm, 256.95 lb/in)

Spring stroke

(K1)

0 ~ 45.0 mm (0 ~ 1.77 in)

 

(K2)

45.0 ~ 90.0 mm (1.77 ~ 3.54 in)

Optional spring

 

No

 

 

 

 

 

 

Rear suspension

 

 

 

 

 

Shock absorber stroke

 

88.0 mm (3.46 in)

Shock absorber spring free length

 

238.5 mm (9.39 in)

Spring rate

(K1)

57.00 N/mm (5.81 kg/mm, 325.46 lb/in)

Stroke

 

0 ~ 88.0 mm (0 ~ 3.46 in)

Enclosed gas pressure

(standard)

1,500 kPa (15.0 kg/cm2, 213.3 psi)

 

(Min)

1,450 kPa (14.5 kg/cm2, 206.2 psi)

 

(Max)

1,550 kPa (15.5 kg/cm2, 220.4 psi)

Wheel

 

 

 

 

 

Front wheel type

 

Panel wheel

Rear wheel type

 

Panel wheel

Front rim size/material

 

10 × 5.5 AT/Aluminum

Rear rim size/material

 

9 × 8.5 AT/Aluminum

Rim runout limit

 

 

 

 

 

Vertical

 

<2.0 mm (0.08 in)>

Lateral

 

<2.0 mm (0.08 in)>

 

 

 

 

 

 

Front disc brake

 

 

 

 

 

Type

 

Dual disc brake

Disc outside diameter × thickness

 

161.0 × 3.5 mm (6.34 × 0.14 in)

<Limit>

 

<3.0 mm (0.12 in)>

Pad thickness

 

4.2 mm (0.17 in)

<Limit>

 

<1.0 mm (0.04 in)>

 

 

 

 

 

 

Rear disc brake

 

 

 

 

 

Type

 

Single disc brake

Disc outside diameter × thickness

 

200.0 × 3.6 mm (7.87 × 0.14 in)

<Limit>

 

<3.1 mm (0.12 in)>

Pad thickness

 

4.5 mm (0.18 in)

<Limit>

 

<1.0 mm (0.04 in)>

 

 

 

 

 

 

– 7 –

 

 

 

 

 

 

 

 

 

 

 

MAINTENANCE SPECIFICATIONS

 

SPEC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Model

 

 

 

YFM350S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Brake lever and brake pedal

 

 

 

 

 

 

 

 

 

 

Brake lever free play

 

0 mm (0 in)

 

 

 

 

 

 

 

 

Brake pedal position

 

50.2 mm (1.98 in)

 

 

 

 

 

 

 

 

 

From the top of the frame to the top of the brake

 

 

pedal

 

 

 

 

 

 

 

 

Throttle lever free play

 

2 ~ 4 mm (0.08 ~ 0.16 in)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive chain

 

 

 

 

 

 

 

 

 

 

Type/manufacturer

 

DID520V/DAIDO

 

 

 

 

 

 

 

Number of links

 

97 + 1 links

 

 

 

 

 

 

 

 

Chain free play

 

25.0 ~ 35.0 mm (0.98 ~ 1.38 in)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tightening torques

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part to be tightened

 

Thread size

Tightening torque

Remarks

 

 

 

 

 

 

 

Nm

 

m · kg

 

ft · lb

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Engine and frame

 

M10

73

 

7.3

53

 

 

 

Front shock absorber and frame

 

M10

48

 

4.8

35

 

 

 

Front shock absorber and lower arm

 

M10

48

 

4.8

35

 

 

 

Steering knuckle and front wheel hub

 

M14

70

 

7.0

50

 

 

 

Steering shaft and frame

 

M10

35

 

3.5

25

 

 

 

Tie-rod locknut

 

M10

15

 

1.5

11

 

 

 

Disc cover (inner)

 

M6

7

 

0.7

5.1

 

 

 

Front brake master cylinder

 

M6

7

 

0.7

5.1

 

 

 

Clutch and parking brake lever assembly

 

M5

4

 

0.4

2.9

 

 

 

Front brake hose and upper front arm

 

M6

7

 

0.7

5.1

 

 

 

Front brake pipe and brake pipe joint

 

M10

19

 

1.9

13

 

 

 

Brake pipe joint and frame

 

M6

10

 

1.0

7.2

 

 

 

Brake caliper bleed screw

 

M8

6

 

0.6

4.3

 

 

 

Rear brake hose union bolt

 

M10

28

 

2.8

20

 

 

 

Parking brake adjusting bolt and locknut

 

M8

16

 

1.6

11

 

 

 

Rear brake light switch bracket and frame

 

M6

7

 

0.7

5.1

 

 

 

Rear brake master cylinder and frame

 

M8

23

 

2.3

17

 

 

 

Rear brake fluid reservoir and frame

 

M6

7

 

0.7

5.1

 

 

 

Rear brake hose and swingarm

 

M6

7

 

0.7

5.1

 

 

 

Rear hub and rear brake caliper

 

M8

34

 

3.4

24

 

 

 

Rear axle ring nut

 

M33

160

 

16.0

115

 

 

LT

 

 

 

 

Rear axle ring nut set bolt

 

M6

7

 

0.7

5.1

 

 

LT

 

 

 

 

Rear hub and swingarm (lower)

 

M10

73

 

7.3

53

 

 

 

Rear shock absorber and frame

 

M12

80

 

8.0

58

 

 

 

Relay arm and swingarm

 

M12

73

 

7.3

53

 

 

 

Rear shock absorber and relay arm

 

M12

73

 

7.3

53

 

 

 

Connecting rod and relay arm

 

M12

73

 

7.3

53

 

 

 

Connecting rod and frame

 

M12

73

 

7.3

53

 

 

 

Spring preload adjusting locknut (rear shock

 

M44

42

 

4.2

30

 

 

 

absorber)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

– 8 –

 

 

 

 

 

 

 

 

MAINTENANCE SPECIFICATIONS

 

SPEC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part to be tightened

Thread size

Tightening torque

Remarks

 

 

 

 

Nm

m · kg

 

ft · lb

 

 

 

 

 

 

 

 

 

 

 

Swingarm guard and swingarm

M8

16

1.6

11

 

 

Driven chain sprocket and boss

M10

55

5.5

40

 

 

Front bumper

M8

12

1.2

8.7

 

 

Rear bumper

M8

34

3.4

24

 

 

Drive chain guard

M8

12

1.2

8.7

 

 

Foot protectors (left and right) and frame

M8

16

1.6

11

 

 

Foot protectors (left and right), rear fender stay

M8

17

1.7

12

 

 

and frame

 

 

 

 

 

 

 

 

 

Foot protectors (left and right) and footrest

M8

17

1.7

12

 

 

Footrest and frame

M10

73

7.3

53

 

 

Battery holder

M6

10

1.0

7.2

 

 

Front fender and front fender bracket

M6

7

0.7

5.1

 

 

Front fender and frame

M6

7

0.7

5.1

 

 

Front fender bracket (center) and frame

M6

10

1.0

7.2

 

 

Front fender brackets (left and right) and frame

M6

13

1.3

9.4

 

 

Headlight bracket and front fender bracket

M6

7

0.7

5.1

 

 

Rear fender and frame

M6

10

1.0

7.2

 

 

Rear fender and rear bumper

M6

7

0.7

5.1

 

 

Rear fender and rear fender stay

M6

7

0.7

5.1

 

 

Rear fender stay and frame

M6

7

0.7

5.1

 

 

Rear fender stay and frame

M8

16

1.6

11

 

 

Engine skid plate and frame

M8

12

1.2

8.7

 

 

Fuel tank

M6

7

0.7

5.1

 

 

Fuel cock and fuel tank

M6

4

0.4

2.9

 

 

Rectifier/regulator

M6

7

0.7

5.1

 

 

Tail/brake light bracket and rear fender

M6

4

0.4

2.9

 

 

 

 

 

 

 

 

 

 

– 9 –

MAINTENANCE SPECIFICATIONS SPEC

ELECTRICAL

Model

YFM350S

 

 

C.D.I.

 

Magneto model/manufacturer

F4T466/MITSUBISHI

Pickup coil resistance

459 ~ 561 Ω at 20 °C (68 °F)

(Color)

(White/Red-White/Green)

Rotor rotation direction detection coil resis-

0.083 ~ 0.101 Ω at 20 °C (68 °F)

tance

 

(Color)

(Red-White/Blue)

C.D.I. unit-model/manufacturer

F8T40374/MITSUBISHI

 

 

Rectifier/regulator

 

Regulator type

Semi conductor-short circuit

Model/manufacturer

SH640E-11/SHINDENGEN

No-load regulated voltage

14.1 ~ 14.9 V

Rectifier capacity

14 A

Withstand voltage

200 V

 

 

Starter relay

 

Model/manufacturer

2768095-A/JIDECO

Amperage rating

180 A

Coil winding resistance

4.18 ~ 4.62 Ω

Battery

 

Specific gravity

1.310 at 20 °C (68 °F)

 

 

Starter motor

 

Model/manufacturer

DBQD5/DENSO

Output

0.7 kW

Armature coil resistance

0.0118 ~ 0.0133 Ω at 20 °C (68 °F)

Brush overall length

12 mm (0.47 in)

 

8.5 mm (0.33 in)

Brush spring pressure

6.38 ~ 9.32 N (651 ~ 950 gf, 22.96 ~ 33.55 oz)

Commutator diameter

28 mm (1.10 in)

 

27 mm (1.06 in)

Mica undercut

0.6 mm (0.024 in)

 

 

– 10 –

 

 

 

 

 

 

 

CABLE ROUTING

 

SPEC

 

 

 

 

 

 

 

 

CABLE ROUTING

 

 

 

 

 

 

 

 

 

 

1 Clutch switch lead

0 Handlebar switch lead

2 Starter cable

 

 

 

 

 

3 Clutch cable

È Fasten the front brake light switch lead with two

4 Parking brake cable

plastic bands.

5 Front brake hose

É Fasten the starter cable, clutch switch lead, and

6 Front brake light switch lead

handlebar switch lead with a plastic band.

7 Throttle cable

Ê Fasten the clutch switch lead and handlebar

8 Neutral indicator light

switch lead with a plastic band.

9 Reverse indicator light

 

 

 

 

 

1

2 3 4

 

 

5

6

 

 

 

 

 

 

Ê

É 9

8

È

 

 

0

 

 

 

7

 

 

 

– 11 –

 

 

 

 

 

 

 

 

 

CABLE ROUTING

 

SPEC

 

 

 

 

 

 

 

 

1 Parking brake cable

 

 

 

 

 

È Pass the clutch switch lead, handlebar switch

2 Clutch cable

lead, neutral/reverse indicator light lead, front

3 Starter cable

brake light switch lead, and starter cable through

4 Clutch switch lead

the guide.

 

 

 

 

5 Handlebar switch lead

É Fasten the clutch switch lead, handlebar switch

6 Neutral/reverse indicator light lead

lead, neutral/reverse indicator light lead, and

7 Rectifier/regulator

front brake light switch lead securely with a plas-

8 Front brake light switch lead

tic locking tie.

 

 

 

 

9 Front brake hose

 

 

 

 

 

0 Throttle cable

 

 

 

 

 

1

2 3

0

9

8

4 5

6

È

É

Ê

Ë

7

– 12 –

Yamaha YFM350 User Manual

CABLE ROUTING SPEC

ÊRoute the clutch switch lead, handlebar switch lead, neutral/reverse indicator light lead, and

front brake light switch lead in front of the guide.

ËPass the throttle cable, clutch cable, and parking brake cable to the right side of the steering shaft.

1

2 3

0

9

8

4 5

6

È

É

Ê

Ë

7

– 13 –

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