Bw Service Manual

YW50AP

LIT-11616-15-39

5PJ-F8197-10

EB000000

YW50AP
SERVICE MANUAL
©2001 by Yamaha Motor Corporation U.S.A.
First edition, November 2001
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation U.S.A.
is expressly prohibited.
P/N LIT-11616-15-39

EB001000

NOTICE
This manual was produced by the Yamaha MotorCompany, Ltd. 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. Therefore, anyone who uses this book to perform maintenance and repairs on Yamaha
vehicles should have a basic understanding of mechanics and the techniques to repair these types
of vehicles. Repair and maintenance work attempted by anyonewithout this knowledge is likely to
render the vehicle unsafe and unfit for use.
Yamaha Motor Company, Ltd. is continually striving to improve all of its models. Modifications
and significant changes in specifications or procedures will be forwarded to all authorized Yamaha
deal-ers and will appear in future editions of this manual where applicable.
NOTE:
Designs and specifications are subjectto change without notice.

IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following.

Q

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

w

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

cC

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

NOTE:

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

HOW TO USE THIS MANUAL
This manual is intended as a handy, easy-to-read reference book for the mechanic. Comprehensive
explanations of all installation, removal, disassembly, assembly, repair and checkprocedures are
laid out with the individual steps in sequential order.
1 The manual is divided into chapters. An abbreviation and symbol in the upper right corner of
each page indicate the current chapter. Refer to “SYMBOLS”.
2 Each chapter is divided into sections. The current section title is shown at the top of each
page, except in Chapter 3 (“PERIODIC CHECKS AND ADJUSTMENTS”), where thesub-section title(s) appears.
3 Sub-section titles appear in smaller print than the section title.
4 To help identify parts and clarify procedure steps, there are exploded diagrams at the start of
each removal and disassembly section.
5 Numbers are given in the order of the jobs in the exploded diagram. A circled number indicates a disassembly step.
6 Symbols indicate parts to be lubricated orreplaced. Refer to “SYMBOLS”.
7 A job instruction chart accompanies the exploded diagram, providing the order of jobs, names
of parts, notes in jobs, etc.
8 Jobs requiring more information (such as special tools and technical data) are described sequentially.

2

1

4

3

6
5

7
8

1

2

EAS00009

SYMBOLS

GEN
INFO

SPEC

3

The following symbols are not relevant toevery vehicle.
Symbols 1 to 8 are designed as thumb tabs
to indicate the chapter’s number and content.
1 General information
2 Specifications
3 Periodic inspection and adjustment
4 Engine
5 Carburetor(s)
6 Chassis
7 Electrical system
8 Troubleshooting

4

INSP
ADJ

ENG

5

6

CHAS

CARB
7

8
–

ELEC

TRBL
SHTG

+

9

0

q

w

e

r

Symbols 9 to yindicate the following.
9 Serviceable with engine mounted
0 Filling fluid
q Lubricant
w Special tool
e Tightening torque
r Wear limit, clearance
t Engine speed
y Electrical data

T.

R.

t

y

u

i
G

E

p

o
M

a
B

s
M

LS

d

f
LT

New

Symbols u to s in the exploded diagrams indicate the types of lubricants and lubrication
points.
u Engine oil
i...