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Yamaha YZ250(N)/LC User Manual

Yamaha YZ250(N)/LC
578 pages
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5MW-28199-30
OWNER’S SERVICE MANUAL
MANUEL D’ATELIER DU
PROPRIETAIRE
FAHRER-UND
WARTUNGS-HANDBUCH
MANUALE DI SERVIZIO DEL
PROPRIETARIO
A4 HYOSHI MASTER H8 JUNE EDIT. DIV.
Y 0
YZ250
(
N
)
/LC
YZ250
(
N
)
/LC
5 MW -9-30 HYOUSHI (QX3.3J) 00.10.12 18:36 y[W 1 (2,1)

Table of Contents

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Yamaha YZ250(N)/LC Specifications

General IconGeneral
Displacement249cc
IgnitionCDI
Final DriveChain
Bore x Stroke66.4mm x 72.0mm
Fuel SystemKeihin PWK38S
Fuel Capacity2.1 gallons

Summary

INTRODUCTION

WARNING

Read manual carefully before operating; attain knowledge of controls and features; receive training in safe riding techniques.

IMPORTANT NOTICE

SAFETY INFORMATION

Guidelines for safe operation including rider experience, protective gear, maintenance, and proper use.

HOW TO USE THIS MANUAL

PARTICULARLY IMPORTANT INFORMATION

Explanation of the Safety Alert Symbol and WARNING/CAUTION/NOTE indicators.

ILLUSTRATED SYMBOLS

GENERAL INFORMATION

IMPORTANT INFORMATION

Crucial information before maintenance or operation, including part usage and handling.

STARTING AND BREAK-IN

Instructions for starting cold and warm engines, and essential break-in procedures for optimal performance.

SPECIFICATIONS

MAINTENANCE SPECIFICATIONS

Technical specifications for engine, chassis, electrical, and brake systems, including limits and service data.

REGULAR INSPECTION AND ADJUSTMENTS

MAINTENANCE INTERVALS

Schedule for regular maintenance tasks based on operating hours or time intervals.

PRE-OPERATION INSPECTION AND MAINTENANCE

Essential checks and maintenance tasks to ensure the machine is in good operating condition before use.

ENGINE

Inspection and maintenance procedures for engine components like piston, rings, cylinder, and clutch.

BRAKES

Procedures for adjusting brake levers/pedals, lubricating pivots, checking discs, fluid levels, and bolts.

FRONT FORKS

Procedures for inspecting, adjusting, and replacing fork oil and oil seals.

REAR SHOCK ABSORBER

Procedures for inspecting, adjusting, lubricating, and retightening the rear shock absorber.

ENGINE

CYLINDER HEAD , CYLINDER AND PISTON

Procedures for disassembly, inspection, and assembly of cylinder head, cylinder, and piston.

CLUTCH AND PRIMARY DRIVEN GEAR

Procedures for disassembly, inspection, and assembly of the clutch and primary driven gear.

CHASSIS

Front suspension

Details on fork travel, spring length, spring rate, optional springs, oil capacity, level, grade, and dimensions.

Rear suspension

Details on shock absorber travel, spring length, spring rate, optional springs, and gas pressure.

Front disc brake

Specifications for front disc brake including outside diameter, thickness, pad thickness, master cylinder, and caliper details.

Rear disc brake

Specifications for rear disc brake including outside diameter, deflection limit, pad thickness, and master cylinder details.

ELECTRICAL

TUNING

Suspension setting

Guidance on adjusting rear suspension setting based on rider feel and circuit conditions, covering spring preload and damping force.

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