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Yamaha YZ250 User Manual

Yamaha YZ250
596 pages
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OWNER’S SERVICE MANUAL
MANUEL D’ATELIER DU
PROPRIETAIRE
FAHRER-UND
WARTUNGS-HANDBUCH
MANUALE DI SERVIZIO DEL
PROPRIETARI
O
YZ250
(
T
)
/T1
1P8-28199-30PRINTED IN JAPAN
2004.5—1.8 × 1 !
(E, F, G, H)
YAMAHA MOTOR CO., LTD.
2500 SHINGAI IWATA SHIZUOKA JAPAN
PRINTED ON RECYCLED PAPER
YZ250
(
T
)
/T1
1P8-9-30 hyoshi 11/5/04 11:19 AM Page 1

Table of Contents

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Yamaha YZ250 Specifications

General IconGeneral
Engine Type249cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke66.4mm x 72.0mm
Compression Ratio8.9~10.6:1
IgnitionCDI
Transmission5-speed; multiplate wet clutch
Final DriveChain
Suspension RearKYB® single shock; fully adjustable, 12.4-in travel
Brakes FrontHydraulic disc, 270mm
Brakes RearHydraulic disc, 240mm
Tires Front80/100-21
Tires Rear110/90-19
Length85.8 in
Width32.5 in
Wheelbase58.5 in
Ground Clearance14.2 in
Fuel Capacity2.1 gal
Wet Weight227 lb
Suspension FrontKYB® inverted fork; fully adjustable, 11.8-in travel
Fuel DeliveryKeihin PWK38S carburetor

Summary

Important Notice

Safety Information

Safety information for operating the machine, including warnings and precautions.

How to Use This Manual

Chapter 1 General Information

Machine Identification

Explains how to find vehicle, frame, and engine serial numbers for parts ordering and identification.

Important Information

Covers essential notices regarding replacement parts, gaskets, oil seals, O-rings, and lock washers.

Special Tools

Lists necessary special tools for tune-up and assembly, detailing their part numbers and uses.

Control Functions

Explains the operation of the motorcycle's controls, including the engine stop button, clutch, and throttle.

Starting and Break-in

Provides procedures for starting a cold and warm engine, including break-in guidelines.

Chapter 2 Specifications

Chapter 3 Regular Inspection and Adjustments

Maintenance Intervals

Provides a general guide for maintenance and lubrication intervals, considering various factors.

Pre-Operation Inspection and Maintenance

Details pre-ride checks for ensuring the machine is in good operating condition.

Chapter 4 Engine

Engine Removal

Provides a step-by-step guide for safely removing the engine from the motorcycle.

Chapter 5 Chassis

Front Fork

Details the disassembly, inspection, and adjustment of the front fork components.

Handlebar

Covers the removal, inspection, and installation of the handlebar and its related parts.

Rear Shock Absorber

Covers the inspection and adjustment of the rear shock absorber, including spring preload and damping force.

Chapter 6 Electrical

Chapter 7 Tuning

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