Yamaha MOTO-4 1987 User manual

1987
ATV / VTT
OWNER'S MANUAL / MANUEL DU PROPRIÉTAIRE
Model : YFM100T
2HX281997000 *2HX281997000*

IDENTIFICATION NUMBERS RECORD Your key identification number is stamped
on your key as shown in the following
1. KEY NUMBER: illustration. Record this number in the space
provided for reference if you need a new key.
2. FRAME AND ENGINENUMBER:
Key num
Record yourvehicleand enginenumbersin
the spaces provided to assistyou in ordering
spare parts from your Yamaha dealer or for
reference in case your vehicle is stolen. (See
page 3-2)

iNTRODUCTiON
Congratulations on your purchase of the NOTE:
Yamaha YFM100T. This model isthe result of Some data in this manual may become
Yamaha's vast experience in the production outdated due to future improvement on this
of fine sporting, touring, and pacessetting model.If you have any questions about this
racing machines. It represents the high degree manual or your machine, please consult a
of craftsmanship and reliability that have Yamaha dealer.
made Yamaha a leader in these fields.
This manual will give you an understanding TECHNICAL PUBLICATIONS
of the operation, inspection, and basic SERVICE DIVISION
maintenance of this motorcycle. If you have MOTORCYCLE OPERATION
any questions about the operation or YAMAHA MOTOR CO.,LTD
maintenance of your machine, please consult
aYamaha dealer.

YFM100T
OWNER'S MANUAL
©1986 by Yamaha Motor Co.,Ltd.
1st Edition,September 1986
All rights reserved. Any reprinting or
unauhorized usewithout the written
permission of Yamaha Motor Co.,Ltd.
isexpressly prohibited.
Printed in Japan

PLEASE READ THIS MANUAL CARE- A WARNING indicates special procedures
FULLY AND COMPLETELY BEFORE that must be followed to avoid injury to a
OPERATING THIS MACHINE.machine operator or person inspecting or
repairing the machine.
Particularly important information is distin-
NOTE: __ __
guished in this manual by the following
notations: This manual should beconsidered apermanent
part of this motorcycle and should remain
NOTE: with it even if the machineis subsequently
sold.
A NOTE provides key information to make
procedures easier or clearer.
A CAUTION indicates special procedures that
must be followed to avoid damage to the
machine.

IMPORTANTNOTICE
THIS VEHICLE IS DESIGNED AND MANUFACTURED FOROFF-ROAD
USE ONLY. IT IS ILLEGAL TO OPERATE THIS VEHICLE ON ANY
PUBLIC STREET, ROAD OR HIGHWAY.SUCH USE IS PROHIBITED
BY LAW.
THIS VEHICLE COMPLIES WITH ALMOST ALL STATE OFF-HIGHWAY
NOISE LEVEL AND SPARK ARRESTER LAWS AND REGULATIONS.
PLEASE CHECK YOUR LOCAL RIDING LAWS AND REGULATIONS
BEFORE OPERATING THIS VEHICLE.

CONTENTS
SAFETY INFORMATION ............ 1-1 Speed limiter ..................... 4-3
Ride with care and good judgement ... 1-1 Front brake lever .................. 4-4
Be careful where you ride ........... 1-6 Rear brake lever .................. 4-4
Gasoline ........................ 1-7 Parking brake button ............... 4-5
Modifications .................... 1-8 Rear brake pedal .................. 4-5
Change pedal ..................... 4-6
LOADING PRECAUTIONS ........... 2-1 Fuel tank cap .................... 4-6
Fuel cock ....................... 4-7
DESCRIPTION AND MACHINE Choke lever ...................... 4-7
IDENTIFICATION .................. 3-1 Seat ............................ 4-8
Vehicle identification number ........ 3-2 Storage box ...................... 4-9
Engine serial number ............... 3-2
PRE-OPERATION CHECKS ........... 5-1
CONTROL FUNCTIONS ............. 4-1 Brake ........................... 5-2
Main switch ...................... 4-1 Fuel ............................ 5-2
Indicator lights ................... 4-1 Engine oil ....................... 5-3
Handlebar switches ................ 4-2 Throttle lever .................... 5-3
Throttle lever .................... 4-3

Fittings/Fasteners ................. 5-3 Riding downhill .................... 7-9
Battery ......................... 5-3 Crossing a slope .................... 7-9
Switches ........................ 5-3 Crossing through shallow water ....... 7-11
Tires ........................... 5-4 Riding over rough terrain ........... 7-12
How to measure tire pressure ........ 5-4 Sliding and skidding ............... 7-13
Tire wear limit .................... 5-5
PERIODIC MAINTENANCE AND
OPERATION ...................... 6-1 ADJUSTMENT ...................... 8-1
Starting a cold engine .............. 6-1 Owner's manual and tool kit .......... 8-1
Starting a warm engine ............. 6-3 Periodic maintenance/Lubrication ...... 8-3
Warming up ...................... 6-3 Torque specifications ............... 8-4
Engine break-in ................... 6-3 Engine oil ........................ 8-5
Shifting and acceleration ............ 6-4 Spark plug ........................ 8-6
Gear shifting ..................... 6-5 Ignition timing .................... 8-8
Parking ......................... 6-5 Air filter cleaning .................. 8-8
Hard starting ..................... 6-7 Carburetor adjustment ............. 8-10
Idle speed adjustment .............. 8-10
RIDING YOUR MOTO-4 ............. 7-1 Cam chain adjustment .............. 8-11
Getting to know your moto-4 ........ 7-2 Valve clearance adjustment .......... 8-11
Learning to ride your moto-4 ........ 7-3 Throttle lever adjustment ........... 8-12
Turning your moto-4 ............... 7-5 Brake pedal and brake
Climbing uphill ................... 7-6 lever adjustment .................. 8-12

Front brake adjustment ............ 8-14 Wl RING DIAGRAM
Brake lining inspection ............ 8-15
Clutch adjustment ................ 8-16
Cable inspection and lubrication ..... 8-16
Lubrication of levers, pedals, etc ..... 8-17
Knuckle shaft ................... 8-17
Wheel removal ................... 8-17
Wheel installation ................ 8-17
Tire tread ...................... 8-18
Battery ........................ 8-18
Replenishing the battery fluid ....... 8-19
Fuse replacement ................ 8-20
Replacing the headlight bulb ........ 8-21
Headlight beam adjustment ......... 8-22
Troubleshooting ................. 8-23
Troubleshooting chart ............. 8-24
CLEANING AND STORAGE ......... 9-1
A.Cleaning .................... 9-1
B. Storage ..................... 9-2
SPECIFICATIONS ................. 10-1