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Yamaha YZ250 2021 User Manual

Yamaha YZ250 2021
148 pages
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BF1-28199-10LIT-11626-34-11
Read this manual carefully before operating this vehicle.
YZ250M2
YZ250XM
OWNER’S MANUAL
YZ250
YZ250X
2021
PRINTED IN JAPAN
2020.04-0.9×1 !
(E)
BF1-28199-10_cover.indd 1-3 2020/03/10 13:38:50

Table of Contents

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Yamaha YZ250 2021 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
Tires Front80/100-21
Tires Rear110/90-19
Width32.5 in
Height50.8 in
Wheelbase58.5 in
Ground Clearance14.2 in
Fuel Capacity2.1 gal
Wet Weight227 lb
Fuel DeliveryKeihin PWK38S carburetor
Suspension FrontKYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Brakes RearHydraulic disc, 245mm

Summary

General Information

Safety Information

Essential safety guidelines and precautions for operating the vehicle.

Maintenance After Break-in

Essential maintenance tasks to perform after the break-in period.

Periodic Checks and Adjustments

Pre-Operation Inspection and Maintenance

Essential checks before operating the vehicle.

Chassis

Front Fork Service

Detailed guide for front fork leg removal, disassembly, and assembly.

Engine

Clutch Service

Comprehensive guide to clutch component removal, checking, and installation.

Troubleshooting

Engine Troubleshooting

Diagnosing and resolving common engine starting and running issues.

Clutch Troubleshooting

Identifying and fixing problems related to clutch slippage or dragging.

Transmission Troubleshooting

Resolving issues with gear shifting and transmission noise.

Cooling System Troubleshooting

Diagnosing causes of overheating and water pump noise.

Brake Troubleshooting

Addressing poor performance issues with disc brakes.

Tuning

Engine Tuning (Carburetor)

Adjusting carburetor settings for optimal performance based on conditions.

Chassis Tuning (Suspension)

Adjusting front and rear suspension settings for rider preference.

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