Yamaha ET250 User Manual

FOREWORD
This service manual provides technical in-
formation on the 1980 models including its
features, differences from the 1979 models
and
new service procedure.
Please read
this manual thoroughly so that
you can have a good knowledge of the new
model and make best use of it in your sales
and after-service activities.
SERVICE DEPARTMENT
YAMAHA MOTOR CO,. LTD.
NOTE:
--~--- _
The Research and Engineering Departments
of Yamaha are continually striving to further
perfect all models. Improvements and
modifications are therefore inevitable.
In
light of this fact, all specifications within
this manual are subject to change without
notice.

Yamaha ET250 Specifications

General

Brand	Yamaha
Model	ET250
Category	Offroad Vehicle
Language	English

Summary

Foreword

Important Notations and Symbols

Modifications

Engine Modifications (Left Crank)

Details changes to the left crank, crankshaft taper, bearing, and oil seal.

Engine Starter Modifications

Explains the removal of the air duct and starter case insert.

Drive Modifications

Details changes to the primary sheave for clutch operation and durability.

Chassis Modifications

Describes frame material, drive guard bracket, and steering gate changes.

Throttle and Tune-up Label Modifications

Covers throttle grip adjustments and tune-up label placement.

Electrical Modifications

Details changes to the main switch, wire harness, and engine stop switch.

Service Procedures

Primary Sheave Removal and Disassembly

Details the steps for removing and disassembling the primary sheave.

Primary Sheave Inspection

Outlines checks for crankshaft, sheave, and bushing condition.

Primary Sheave Reassembly

Covers the steps for reassembling the primary sheave components.

Maintenance Intervals

Specifications

Special Tools

Wire Routing Diagram

Wiring Diagram