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Yamaha YZ250FX 2019 User Manual

Yamaha YZ250FX 2019
398 pages
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B29-28199-14LIT-11626-32-17
Read this manual carefully before operating this vehicle.
YZ250FXK
OWNER’S SERVICE MANUAL
YZ250FX
2019
PRINTED IN JAPAN
2018.04-0.3×1 !
(E)
PRINTED ON RECYCLED PAPER
2019
YZ250FXK
B29-28199-14_13mm.indd 1-3 2018/03/29 17:50:43

Table of Contents

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Yamaha YZ250FX 2019 Specifications

General IconGeneral
Displacement250cc
Bore x Stroke77.0mm x 53.6mm
Fuel SystemYamaha Fuel Injection (YFI), Keihin® 44mm
IgnitionTCI: Transistor Controlled Ignition
Final DriveChain
Front BrakeHydraulic disc, 270mm
Rear BrakeHydraulic disc, 245mm
Seat Height37.6 in
Ground Clearance12.8 in
Fuel Capacity2.1 gal
Wet Weight249 lb
Engine TypeLiquid-cooled DOHC 4-stroke
TransmissionWide-ratio 6-speed; multiplate wet clutch
Front SuspensionKYB® spring-type fork, fully adjustable
Rear SuspensionKYB® single shock
L x W x H32.5 in
Front Tire90/90-21
Rear Tire110/100-18

Summary

GENERAL INFORMATION

TORQUE-CHECK POINTS

Lists critical torque specifications for various components.

SPECIFICATIONS

ENGINE SPECIFICATIONS

Details engine type, displacement, bore, stroke, compression ratio, and fuel.

TIGHTENING TORQUES

Specifies general tightening torques for standard fasteners.

PERIODIC CHECKS AND ADJUSTMENTS

MAINTENANCE INTERVALS

Outlines recommended maintenance intervals for various vehicle components.

PRE-OPERATION INSPECTION AND MAINTENANCE

Details pre-ride checks to ensure the machine is in good operating condition.

ENGINE

Covers checks and adjustments for engine-related systems.

CHASSIS

FRONT WHEEL

Details procedures for removing, checking, disassembling, and assembling the front wheel.

REAR WHEEL

Covers procedures for removing, checking, and assembling the rear wheel.

FRONT BRAKE

Details removal, disassembly, checking, and assembly of the front brake system.

REAR BRAKE

Covers removal, disassembly, checking, and assembly of the rear brake system.

FRONT FORK

Covers removal, disassembly, checking, and assembly of the front fork legs.

REAR SHOCK ABSORBER ASSEMBLY

Covers handling, removal, checking, and installation of the rear shock absorber.

ENGINE

ENGINE REMOVAL

Provides the procedure for removing the engine from the vehicle.

CAMSHAFT

Covers removal, checking, and installation of the camshaft.

CYLINDER HEAD

Details procedures for removing, checking, and installing the cylinder head.

VALVES AND VALVE SPRINGS

Covers removal, checking, and installation of valves, springs, and related parts.

CYLINDER AND PISTON

Details procedures for removing, checking, and installing the cylinder and piston.

CLUTCH

Details removal, checking, and installation of the clutch assembly.

CRANKCASE

Details procedures for separating, disassembling, checking, and assembling the crankcase.

CRANKSHAFT ASSEMBLY AND BALANCER SHAFT

Covers removal, checking, and installation of the crankshaft and balancer shaft.

TRANSMISSION

Details removal, checking, and installation of the transmission components.

ELECTRICAL SYSTEM

IGNITION SYSTEM

Covers circuit diagram, troubleshooting, and checking ignition components.

TROUBLESHOOTING

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