FOREWORD
This Supplementary Service Manual has been
prepared to introduce new service and new
data for the RS90RX/RS90GTX/RS90GTAX/
RS90LTX/RS90LTGTX.
For complete information, on service proce-
dures, it is necessary to use this Supplementary
Service Manual together with following manual:
NOTICE
This manual was written by the Yamaha Motor
Company primarily for use by Yamaha dealers
and their qualified mechanics. It is not possible
to put an entire mechanic’s education into one
manual, so it is assumed that persons using
this book to perform maintenance and repairs
on Yamaha snowmobiles have a basic under-
standing of the mechanical concepts and pro-
cedures inherent in snowmobile repair.
Without such knowledge, attempted repairs or
service to this model may render it unfit and/or
unsafe to use.
Yamaha Motor Company, Ltd. is continually
striving to improve all models manufactured by
Yamaha.
Modifications and significant changes in speci-
fications or procedures will be forwarded to all
authorized Yamaha dealers and will, where
applicable, appear in future editions of this
manual.
HOW TO USE THIS MANUAL
Particularly important information is distin-
guished in this manual by the following notations:
The Safety Alert Symbol means ATTENTION!
BE ALERT! YOUR SAFETY IS INVOLVED!
Failure to follow WARNING instructions could
result in severe injury or death to the snowmo-
bile operator, a bystander, or a person inspect-
ing or repairing the snowmobile.
A CAUTION indicates special precautions that
must be taken to avoid damage to the snowmobile.
A NOTE provides key information that can
make procedures easier or clearer.
MANUAL FORMAT
All of the procedures in this manual are orga-
nized in a sequential, step-by-step format. The
information has been compiled to provide the
mechanic with an easy to read, handy refer-
ence that contains comprehensive explana-
tions of all inspection, repair, assembly, and
disassembly operations.
In this revised format, the condition of a faulty
component will precede an arrow symbol and
the course of action required to correct the
problem will follow the symbol, e.g.,
• Bearings
Pitting/damage
→
Replace.
EXPLODED DIAGRAM
Each chapter provides exploded diagrams
before each disassembly section to facilitate
correct disassembly and assembly procedures.
RS90K/RS90RK/RSG90K/RS90MK/RST90K/
RST90TFK
SERVICE MANUAL:
8FJ-28197-10 (981096) (LIT-12618-02-38)
RS90NL/RS90NRL/RS90RSL/RS90GTL/RS90MSL
SUPPLEMENTARY SERVICE MANUAL:
8GE-28197-10 (LIT-12618-02-47)
RSG90GTW/RST90GTW
SUPPLEMENTARY SERVICE MANUAL:
8GX-28197-10 (LIT-12618-02-51)
RS90RX/RS90GTX
RS90GTAX/RS90LTX
RS90LTGTX
SUPPLEMENTARY SERVICE MANUAL
©
2007 by Yamaha Motor
Corporation, U.S.A.
1st Edition, May 2007
All rights reserved. Any reprinting or
unauthorized use without the written
permission of Yamaha Motor Corporation,
U.S.A. is expressly prohibited.
Printed in U.S.A.
P/N.LIT-12618-02-70
WARNING
CAUTION:
NOTE:
