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YFS200P
SUPPLEMENTARY
SERVICE MANUAL
LIT-11616-15-05

3JM-28197-11

FOREWORD
This Supplementary Service Manual has been prepared to introduce new service and new data for
the YFS200P. For complete information on service procedures, it is necessary to use this Supplementary Service Manual together with the following manual.
YFS200U SERVICE MANUAL: 2XJ-28197-10
YFS200A SUPPLEMENTARY SERVICE MANUAL: 3JM-28197-10

YFS200P
SUPPLEMENTARY
SERVICE MANUAL
 2001 by Yamaha Motor Corporation, U.S.A.
First Edition, May 2001
All rights reserved.
Any reproduction or unauthorized use
without the written permission of
Yamaha Motor Corporation, U.S.A.
is expressly prohibited.
Printed in U.S.A.
LIT-11616-15-05

EB001000

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.

IMPORTANT INFORMATION
Particularly important information is distinguished in this manual by the following notations.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED!

WARNING

CAUTION:
NOTE:

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

HOW TO USE THIS MANUAL
CONSTRUCTION OF THIS MANUAL
This manual consists of chapters for the main categories of subjects. (See “Illustrated symbols”)
1st title 1:

This is a chapter with its symbol on the upper right of each page.

2nd title 2:

This title appears on the upper of each page on the left of the chapter symbol. (For the chapter “Periodic inspection and adjustment” the 3rd title
appears.)

3rd title 3:

This is a final title.

MANUAL FORMAT
All of the procedures in this manual are organized in a sequential, step-by-step format. The information has been compiled to provide the mechanic with an easy to read, handy reference that contains
comprehensive explanations of all disassembly, repair, assembly, and inspections.
A set of particularly important procedure 4 is placed between a line of asterisks “*” with each procedure preceded by “●”.
IMPORTANT FEATURES
● Data and a special tool are framed in a box preceded by a relevant symbol 5.
● An encircled numeral 6 indicates a part name, and an encircled alphabetical letter data or an
alignment mark 7, the others being indicated by an alphabetical letter in a box 8.
● A condition of a faulty component will precede an arrow symbol 9 and the course of action will follow it.
EXPLODED DIAGRAM
Each chapter provides exploded diagrams before each disassembly section for ease in identifying
correct disassembly and assembly procedures.

EB003000

GEN
INFO

ILLUSTRATED SYMBOLS
Illustrated symbols 1 to 9 are printed on the
top right of each page and indicate the subject
of each chapter.

SPEC

CHK
ADJ

1 General information
2 Specifications
3 Periodic checks and adjustments
4 Engine
5 Carburetion
6 Drive train
7 Chassis
8 Electrical
9 Troubleshooting

ENG

CARB

DRIV

CHAS

–

ELEC

Illustrated symbols 0 to F are used to identify
the specifications appearing in the text.

0 Filling fluid
A Lubricant
B Special tool
C Torque
D Wear limit, clearance
E Engine speed
F Ω, V, A

TRBL
SHTG

E
J

K
B

M
M

Illustrated symbols G to M in the exploded
diagrams indicate the types of lubricants and
lubrication points.

New

G Apply engine oil
H Apply gear oil
I Apply molybdenum disulfide oil
J Apply wheel bearing grease
K Apply lightweight lithium soap base grease
L Apply molybdenum disulfide grease
M Apply silicon grease

Illustrated symbols N to O in the exploded
diagrams indicate where to apply a locking
agent N and when to install a new part O.
N Apply the locking agent (LOCTITE)
O Replace

CONTENTS
GENERAL INFORMATION............................................................................... 1
MACHINE IDENTIFICATION .................................................................... 1
MODEL LABEL ..................................................................................... 1
SPECIFICATIONS ............................................................................................ 2
GENERAL SPECIFICATIONS .................................................................. 2
MAINTENANCE SPECIFICATIONS ......................................................... 3
ENGINE................................................................................................. 3
CHASSIS............................................................................................... 5
ELECTRICAL ........................................................................................ 5
CABLE ROUTING ..................................................................................... 6
PERIODIC CHECKS AND ADJUSTMENTS .................................................. 11
INTRODUCTION ..................................................................................... 11
PERIODIC MAINTENANCE/LUBRICATION INTERVALS ...................... 11
CHASSIS................................................................................................. 12
ADJUSTING THE REAR BRAKE LIGHT SWITCH............................. 12
ELECTRICAL.................................................................................................. 13
CHECKING THE SWITCH ...................................................................... 13
CHECKING THE SWITCH .................................................................. 13
CHECKING A SWITCH SHOWN IN THE MANUAL ........................... 13
SIGNAL SYSTEM.................................................................................... 14
CIRCUIT DIAGRAM ............................................................................ 14
CHECKING THE SIGNAL SYSTEM ................................................... 15
YFS200P WIRING DIAGRAM

MACHINE IDENTIFICATION

GEN
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–

GENERAL SPECIFICATIONS

SPEC

SPECIFICATIONS
GENERAL SPECIFICATIONS
Model
Model code number
Spark plug:
Type/manufacturer
Spark plug gap
Tire:
Type
Size: Front
Rear
Electrical:
Ignition system
Generator system
Headlight type
Headlight bulb type
Bulb wattage × quantity:
Headlight
Tail/brake light
Indicator light “OIL LEVEL”

YFS200P
5KJ7 (USA)
BR8ES/NGK
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
Tubeless
AT21 × 7 – 10 DUNLOP KT851A
CHENG SHIN C873N
AT21 × 10 – 8 DUNLOP KT895A
CHENG SHIN C874N
C.D.I.
C.D.I. magneto
Bulb type
Incandescence
12 V 45 W/45 W × 1
12 V 5 W/21 W × 1
12 V 3.4 W × 1

–2–

MAINTENANCE SPECIFICATIONS

SPEC

MAINTENANCE SPECIFICATIONS
ENGINE
Model

YFS200P

Piston:
Piston size “D”
Measuring point “H”
Piston off-set
Piston-to-cylinder clearance
D

Oversize 1st
2nd
Piston ring:
Sectional sketch
Top ring

65.940 ~ 66.000 mm (2.596 ~ 2.598 in)
10 mm (0.39 in)
0 mm (0 in)
H
0.035 ~ 0.040 mm (0.0014 ~ 0.0016 in)
0.100 mm (0.0039 in)
66.25 mm (2.608 in)
66.50 mm (2.618 in)
Keystone
B = 1.2 mm (0.047 in)
T = 2.8 mm (0.110 in)

B
T

2nd ring

Keystone
B = 1.2 mm (0.047 in)
T = 2.8 mm (0.110 in)

Top ring
2nd ring
Top ring
2nd ring

0.20 ~ 0.40 mm (0.008 ~ 0.016 in)
0.20 ~ 0.40 mm (0.008 ~ 0.016 in)
0.03 ~ 0.05 mm (0.0012 ~ 0.0020 in)
0.03 ~ 0.05 mm (0.0012 ~ 0.0020 in)

B
T

End gap (Installed)
Side clearance
Crankshaft:
Crank width “A”

Big end side clearance “D”
Big end radial clearance “E”
Small end free play “F”

F
C

57.90 ~ 57.95 mm (2.280 ~ 2.281 in)
<0.03 mm (0.0012 in)>
0.2 ~ 0.7 mm (0.008 ~ 0.028 in)
0.021 ~ 0.035 mm (0.0008 ~ 0.0014 in)
0.8 ~ 1.0 mm (0.031 ~ 0.039 in)

D
A

Clutch:
Friction plate thickness/quantity

Clutch plate thickness/quantity

Clutch spring free length/quantity
Clutch spring minimum length
Clutch housing radial clearance
Clutch release method

2.92 ~ 3.08 mm (0.115 ~ 0.121 in)/7 pcs.
<2.8 mm (0.110 in)>
1.05 ~ 1.35 mm (0.041 ~ 0.053 in)/6 pcs.
<0.05 mm (0.002 in)>
34.5 mm (1.36 in)/5 pcs.
30.0 mm (1.18 in)
0.015 ~ 0.049 mm (0.0006 ~ 0.0019 in)
Inner push, cam push
<0.15 mm (0.006 in)>

–3–

MAINTENANCE SPECIFICATIONS
Model
Air filter oil grade
Carburetor:
I.D. mark
Main jet
Main air jet
Jet needle-clip position
Needle jet
Cutaway
Pilot outlet
Pilot jet
Bypass 1
Valve seat size
Starter jet
Float height
Fuel level
Engine idling speed

SPEC

YFS200P
Yamalube 2 or air cooled 2-stroke engine oil

(M.J.)
(M.A.J.)
(J.N.)
(N.J.)
(C.A.)
(P.O.)
(P.J.)
(B.P.1.)
(V.S.)
(G.S.)
(F.H.)
(F.L.)

2XJ01
#230
ø0.7
5J22-2
P-6 (#345)
2.0
0.6
#32.5
0.8 × 3.75
ø2.8
#45
20.5 ~ 21.5 mm (0.81 ~ 0.85 in)
0.5 ~ 1.5 mm (0.02 ~ 0.06 in)
1,450 ~ 1,550 r/min

–4–

MAINTENANCE SPECIFICATIONS

SPEC

CHASSIS
Model
Rear suspension:
Shock absorber travel
Spring free length
Spring rate
Stroke

YFS200P
80 mm (3.15 in)
248 mm (9.76 in)
44.1 N/mm (4.50 kg/mm, 252.0 lb/in)
83.4 N/mm (8.50 kg/mm, 476.0 lb/in)
0 ~ 58.0 mm (0 ~ 2.28 in)
58.0 ~ 105.0 mm (2.28 ~ 4.13 in)
No.

K1
K2
K1
K2

Optional spring
Brake lever:
Brake lever free play
Clutch lever:
Clutch lever free play

3 ~ 5 mm (0.12 ~ 0.20 in) at lever pivot
2 ~ 3 mm (0.08 ~ 0.12 in) at lever pivot

Tightening torque
Parts to be tightened

Thread size

Front arm (lower and upper) and frame
Steering knuckle and ball joint (front lower arm)
Steering knuckle and ball joint (front upper arm)
Footrest
Rear bumper

M10 × 1.25
M10 × 1.25
M10 × 1.25
M10 × 1.25
M8 × 1.25

Tightening torque
Nm m · kg ft · lb
32
25
48
64
23

3.2
2.5
4.8
6.4
2.3

23
18
35
46
17

ELECTRICAL
Model
Ignition coil:
Model/manufacturer
Minimum spark gap
Primary coil resistance
Secondary coil resistance
Spark plug cap:
Type
Resistance

YFS200P
2JN/YAMAHA
6 mm (0.24 in)
0.18 ~ 0.28 Ω at 20 °C (68 °F)
6.32 ~ 9.48 kΩ at 20 °C (68 °F)
Resin type
5 kΩ

–5–

Remarks

CABLE ROUTING

SPEC

CABLE ROUTING
1 Clutch cable
2 Parking brake cable
3 Front brake cable
4 Throttle switch lead
5 Front brake light switch
6 Band
7 Throttle cable
8 Handlebar switch lead (left)
9 Voltage regulator lead
0 Front brake light switch lead

A Oil indicator light lead
B Main switch lead
C Headlight lead
D Control unit
E CDI unit
F Ground lead
G Voltage regulator

–6–

È The throttle cable should be
routed behind the clutch cable,
and on the left side of the guide.
É Route all leads behind the cables
and through the cable guide.
Ê Route all leads toward the CDI
unit side.
Ë The ground and voltage regulator leads should be routed in
front of the cables.

CABLE ROUTING
1 Front brake cable
2 Clutch cable
3 Main switch lead
4 Fuel breather hose
5 Band
6 Wire harness
7 Crankcase ventilation hose

SPEC

È Route the clutch cable in front of the fender stay.
É Route the front brake cable through the cable
guide, behind the front shock absorber, and
above the tie rod.

–7–

CABLE ROUTING
1 Wire harness
2 Crankcase ventilation hose
3 Fuel hose
4 Wire holder
5 Rear brake light switch
6 Band
7 Clamp
8 Oil hose
9 Carburetor overflow hose
0 Flywheel magneto lead

SPEC

È For installing the wire harness, align the positioning tape with the wire holder.
É The leads should be clamped on the inward half
of the frame pipe.
Ê Clamp the oil hose and rear brake light switch
lead with the plastic clamp.

–8–

CABLE ROUTING
1 Front brake cable
2 Parking brake cable
3 Spark plug lead
4 Crankcase ventilation hose
5 Rear brake light switch
6 Band
7 Tail/brake light lead
8 Oil level gauge lead
9 Oil hose
0 Wire harness
A Clamp
B Throttle switch lead

SPEC

C Throttle cable
D Clutch cable
E Ignition coil lead
F Ignition coil
G Ground lead
È Place the slack of the spark plug lead toward the
left side of the frame.

–9–

CABLE ROUTING
1 Rear brake light switch
2 Oil hose
3 Crankcase ventilation hose
4 Parking brake cable
5 Cable guide
6 Rear brake cable

SPEC

È Route the parking brake cable in front of the
fender stay.

– 10 –

INTRODUCTION/
PERIODIC MAINTENANCE/LUBRICATION INTERVALS
EB300000

CHK
ADJ

PERIODIC CHECKS AND ADJUSTMENTS

INTRODUCTION
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 as well as to new vehicles that are being prepared
for sale. All service technicians should be familiar with this entire chapter.
EB301000

PERIODIC MAINTENANCE/LUBRICATION INTERVALS
Initial
Item

Routine

Transmission

• Replace oil.

Spark plug

• Check condition.
• Adjust gap and clean.
• Replace if necessary.

Air filter

• Clean.
• Replace if necessary.
• Check idle speed / starter operation.
• Adjust if necessary.

* Crankcase breather system

• Check breather hose for cracks or damage.
• Replace if necessary.

* Exhaust system

• Check for leakage.
• Retighten if necessary.
• Replace gasket if necessary.

* Fuel line

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

Throttle operation

• Inspect and adjust free play if necessary.

Front brake operation

• Inspect and adjust free play if necessary.

* Front brake shoes

• Check wear limit.
• Replace if necessary.

* Rear brake pads

• Check pad wear.
• Replace if necessary.

* Clutch

• Inspect free play and operation.
• Replace if necessary.

Drive chain

1
year

Every 20 ~ 40 hours.
(More often in wet or dusty areas)

* Carburetor

Spark arrester

Every

1
3
6
6
month months months months

• Lubricate, check free play and alignment.
• Replace if necessary.

* Drive chain guard and
rollers

• Check wear and replace if necessary.

* Steering system

• Inspect free play, clean and lubricate.**

* Front and rear suspension

• Inspect and lubricate.**

Tire, wheels

• Inspect air pressure, wheel runout, and tire wear.
• *Inspect bearings.
• *Replace bearings if necessary.

Throttle, control cable

• Check routing and connection.
• *Lubricate.

Outside nuts and bolts

• Retighten.

Frame

• Clean and inspect.

Lighting equipment

• Inspect.

* It is recommended that these items be serviced by a Yamaha dealer.
** Lithium-soap-based grease

– 11 –

ADJUSTING THE REAR BRAKE LIGHT SWITCH

CHK
ADJ

CHASSIS
ADJUSTING THE REAR BRAKE LIGHT
SWITCH
NOTE:
The rear brake light switch is operated by
movement of the brake pedal.
The rear brake light switch is properly adjusted
when the brake light comes on just before the
braking effect starts.

1.Check:
● Rear brake light operation timing
Incorrect → Adjust.
2.Adjust:
● Rear brake light operation timing

***********************************************
the main body 1 of the rear brake light
switch so that it does not rotate and turn the
adjusting nut 2 in direction a or b until the
rear brake light comes on at the proper time.

● Hold

Direction a

Brake light comes on
sooner.

Direction b

Brake light comes on
later.

***********************************************

– 12 –

CHECKING THE SWITCH

ELEC

–

ELECTRICAL
CHECKING THE SWITCH
CHECKING THE SWITCH
Use a pocket tester to check the terminals for
continuity. If the continuity is faulty at any
point, replace the switch.
Pocket tester:
P/N. YU-03112, 90890-03112
NOTE:
● Set the pocket tester to “0” before starting
the test.
● The pocket tester should be set to the “Ω × 1”
range when testing the switch for continuity.
● Turn the switch on and off a few times when
checking it.

CHECKING A SWITCH SHOWN IN THE
MANUAL
The terminal connections for switches (main
switch, handlebar switch, engine stop switch,
light switch, etc.) are shown in a chart similar
to the one on the left.
This chart shows the switch positions in the
column and the switch lead colors in the top
row.
For each switch position, “
” indicates
the terminals with continuity.
The example chart shows that:
1 There is continuity between the “Red and
Brown” leads when the switch is set to “ON”.

– 13 –

– 14 –

Y/R

B/W

OFF
LO
HI

(BLACK) (BLACK)

Y/R

B/W

Y/R

B/R

B/R
Y/R

W/R

RUN
OFF

B/W

B/W B

OFF
ON

B/W

O
B

Y/B

(GRAY)

Y/B

(GRAY)

Y/B

B/W

7
Y/B

Y/B

B
B

(BLACK) (BLACK)

Y/B

B/W Y/B
Y/B B/W

1 CDI magneto
2 Voltage regulator
9 Oil indicator light
0 Oil level gauge
E Tail/brake light
F Rear brake light switch
G Front brake light switch

SIGNAL SYSTEM

ELEC
–

EB806000

SIGNAL SYSTEM

CIRCUIT DIAGRAM

SIGNAL SYSTEM

ELEC

CHECKING THE SIGNAL SYSTEM
1.If the tail/brake light fails to come on:
NO CONTINUITY

1.Bulb and bulb socket
●

Check the bulb and bulb socket for continuity.
Replace the bulb and/or bulb socket.
CONTINUITY
NO CONTINUITY

2.Brake light switches
Refer to “CHECKING THE SWITCH”.
CONTINUITY

Replace the brake switch.

3.Voltage
●

●

Connect the tachometer to the spark plug
lead.
Connect the pocket tester (DC 20V) to the
bulb socket connector.
Tester (+) lead → Yellow terminal 1
Tester (–) lead → Black terminal 2

●

Start the engine and accelerate to about
5,000 r/min.

CAUTION:
MEETS SPECIFICATION

Do not run the engine in neutral above
6,000 r/min for more than 1 or 2 seconds.
Lighting voltage:
13.5 ~ 14.1 V at 5,000 r/min

The lighting circuit is not faulty.

OUT OF
SPECIFICATION

– 15 –

–

SIGNAL SYSTEM

ELEC

*
4.Lighting coil resistance
●

●

Disconnect the CDI magneto leads (Yellow/Red and Black).
Connect the pocket tester (Ω × 1) to the
lighting coil leads.
Tester (+) lead → Yellow/Red lead 1
Tester (–) lead → Black lead 2

OUT OF SPECIFICATION
●

Measure the lighting coil resistance.
Lighting coil resistance:
0.16 ~ 0.24 Ω at 20 °C (68 °F)

Replace the stator assembly.

MEETS
SPECIFICATION
POOR CONNECTION

5.Wiring connections
●

Check the connections of the entire lighting
system.
Refer to “CIRCUIT DIAGRAM”.

Properly connect the lighting system.

CORRECT
Replace the voltage regulator.

– 16 –

–

YAMAHA MOTOR CO., LTD.
2500 SHINGAI IWATA SHIZUOKA JAPAN

PRINTED IN U.S.A.

Y/R

B/W

OFF
LO
HI

(BLACK) (BLACK)

Y/R

B/W

Y/R

B/R

Y/R

W/R

YFS200P WIRING DIAGRAM

RUN
OFF

B/W

B/W B

OFF
ON

B/W

O
B

4
5

Y/B

(GRAY)

B
B

Y/B

B/R........ Black/Red
B/W ....... Black/White
W/R....... White/Red
Y/B ........ Yellow/Black
Y/R........ Yellow/Red

7
Y/B

B/W Y/B

Y/B B/W

(BLACK) (BLACK)

Y/B

COLOR CODE
B ............Black
Br ...........Brown
G ............Green
L.............Blue
O ............Orange
Y ............Yellow

Y/B

(GRAY)

Y/B

B/W

1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
F
G
CDI magneto
Voltage regulator
CDI unit
Ignition coil
Spark plug
Control unit
Throttle switch
Carburetor switch
Oil indicator light
Oil level gauge
Main switch
Engine stop switch
Lights switch
Headlight
Tail/brake light
Rear brake light switch
Front brake light switch

Source Exif Data:

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File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.4
Linearized                      : Yes
Create Date                     : 2001:08:28 16:38:29Z
Modify Date                     : 2001:09:21 16:53:54-06:00
Page Count                      : 24
Creation Date                   : 2001:08:28 16:38:29Z
Mod Date                        : 2001:09:21 16:53:54-06:00
Producer                        : Acrobat Distiller 5.0 (Windows)
Author                          : svcsas1
Metadata Date                   : 2001:09:21 16:53:54-06:00
Creator                         : svcsas1
Title                           : 11616-15-05.pdf
Has XFA                         : No

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