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Yamaha YZ 2015 Series User Manual

Yamaha YZ 2015 Series
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2015
OWNER’S SERVICE MANUAL
YZ250FXF
B29-28199-10LIT-11626-28-51
YZ250FXF 2015
q
Read this manual carefully before operating this vehicle.
PRINTED ON RECYCLED PAPER PRINTED IN JAPAN
2014.09––0.8 × 1
!
(E)
B29-28199-10_cover_12mm.indd 1 2014/08/25 10:37:14

Table of Contents

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Yamaha YZ 2015 Series Specifications

General IconGeneral
BrandYamaha
ModelYZ 2015 Series
CategoryMotorcycle
LanguageEnglish

Summary

Yamaha Motor Corporation, U.S.A. YZ Motorcycle Limited Warranty

Safety Information

How to Use This Manual

Symbols

General Information

Location of Important Labels

Identifies the location of important labels on the vehicle for user reference and safety.

Description

Provides an overview and identification of major vehicle components and controls.

Control Functions

Explains the operation and location of key controls like switches, levers, and pedals.

Specifications

General Specifications

Details overall dimensions, weight, and model information for the vehicle.

Engine Specifications

Provides detailed technical data for the engine, including type, displacement, and oil specs.

Chassis Specifications

Lists technical data for chassis components like wheels, brakes, and suspension.

Electrical Specifications

Details specifications for electrical system components like battery, ignition, and starter.

Tightening Torques

Specifies torque values for standard fasteners and critical assemblies.

Lubrication Points and Lubricant Types

Identifies lubrication points and specifies recommended lubricants for engine and chassis.

Periodic Checks and Adjustments

Maintenance Intervals

Outlines the recommended service schedule for periodic checks and maintenance.

Pre-Operation Inspection and Maintenance

Lists essential checks before operating the vehicle to ensure good condition.

Engine

Covers checks and adjustments for engine-related systems like cooling and oil.

Chassis

Details checks and adjustments for chassis components like brakes, wheels, and suspension.

Electrical System

Describes checks for electrical components like spark plug, battery, and switches.

Chassis

Front Wheel

Covers removal, checking, disassembly, and assembly of the front wheel.

Rear Wheel

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

Front Brake

Explains the removal, disassembly, and assembly of the front brake system components.

Rear Brake

Provides procedures for removing, disassembling, and assembling the rear brake system.

Handlebar

Covers removal, checking, and installation of the handlebar and its related controls.

Front Fork

Details the disassembly, checking, and assembly procedures for the front fork legs.

Rear Shock Absorber Assembly

Explains handling, removal, disassembly, and assembly of the rear shock absorber.

Chain Drive

Covers removal, checking, and installation procedures for the drive chain and sprockets.

Engine

Engine Removal

Provides steps for removing the exhaust pipe, electronic parts, and the entire engine.

Camshaft

Details removal, checking, and installation procedures for the camshaft and related parts.

Cylinder Head

Covers removal, checking, and installation of the cylinder head assembly.

Valves and Valve Springs

Explains removal, checking, and installation of valves, springs, and related components.

Cylinder and Piston

Details removal, checking, and installation procedures for the cylinder and piston assembly.

Clutch

Covers removal, checking, and installation procedures for the clutch system components.

Kickstarter

Provides steps for removing, checking, and installing the kick starter mechanism.

Shift Shaft

Details removal, checking, and installation procedures for the shift shaft and related parts.

Oil Pump and Balancer Gear

Covers removal, checking, and assembly of the oil pump and balancer gear systems.

Generator and Starter Clutch

Explains removal, checking, and installation procedures for the generator and starter clutch.

Crankcase

Details crankcase separation, bearing removal, and assembly procedures.

Crankshaft Assembly and Balancer Shaft

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

Transmission

Provides procedures for removing, checking, and installing the transmission components.

Cooling System

Radiator

Covers radiator handling, checking, and removal procedures.

Water Pump

Details water pump removal, checking, and assembly procedures.

Fuel System

Fuel Tank

Covers fuel tank removal, fuel pump procedures, and fuel pressure checks.

Throttle Body

Explains throttle body removal, injector, and sensor checks.

Electrical System

Ignition System

Details ignition system circuit diagrams, troubleshooting, and component checks.

Electric Starting System

Covers circuit diagrams, operation, and troubleshooting for the electric starting system.

Charging System

Provides circuit diagrams and troubleshooting for the battery charging system.

Fuel Injection System

Includes circuit diagrams, diagnostic tool usage, and troubleshooting for the FI system.

Electrical Components

Details checks for switches, fuses, battery, relays, and sensors.

Troubleshooting

Starting Failures

Lists common causes and checks for engine starting problems.

Poor Medium-and-High-Speed Performance

Outlines potential causes for performance issues at medium and high speeds.

Unstable Handling

Lists chassis-related issues that can cause unstable vehicle handling.

List of Self-Diagnostic and Fail-Safe Actions

Provides a reference for diagnostic codes and associated fail-safe actions.

Tuning

Chassis

Covers chassis tuning aspects like sprocket selection and tire pressure.

Front Fork Setting

Explains how to adjust front fork characteristics like oil amount and spring preload.

Rear Suspension Setting

Details rear suspension adjustments for spring preload and damping force.

Suspension Setting (Front Fork)

Provides a table for adjusting front fork settings based on observed symptoms.

Suspension Setting (Rear Shock Absorber)

Offers adjustments for rear shock absorber settings based on ride symptoms.

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