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Yamaha YZF-R7 User Manual

Yamaha YZF-R7
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3 - 22
CHK
ADJ
MEASURING THE COMPRESSION PRESSURE
WARNING
WARNING
To prevent sparking, ground all spark
plug leads before cranking the engine.
NOTE:
The difference in compression pressure
between cylinders should not exceed
100 kPa (1 kg/cm
2
, 14 psi).
c. If the compression pressure is above
the maximum specification, check the
cylinder head, valve surfaces, and
piston crown for carbon deposits.
Carbon deposits → Eliminate.
d. If the compression pressure is below
the minimum specification, squirt a
few drops of oil into the cylinder and
measure again.
Refer to the following table.
â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–² â–²
7. Install:
• spark plug
Compression pressure
(with oil applied into the cylinder)
Reading Diagnosis
Higher than with-
out oil
Piston wear or
damage → Repair.
Same as without
oil
Piston ring(-s),
valve(-s), cylinder
head gasket or
piston possibly
defective →
Repair.
T
R
.
.
13 Nm (1.3 m · kg, 9.4 ft · lb)

Table of Contents

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Yamaha YZF-R7 Specifications

General IconGeneral
Bore x Stroke80.0mm x 68.6mm
Compression Ratio11.5:1
Fuel DeliveryFuel injection
Final DriveChain
Front BrakesDual 298mm hydraulic disc; ABS
Rear Brakes245mm hydraulic disc; ABS
Front Tire120/70ZR17
Rear Tire180/55ZR17
Wheelbase54.9 in
Seat Height32.9 in
Fuel Capacity3.4 gal
Wet Weight414 lb
Ground Clearance5.3 in
Engine TypeLiquid-cooled, 4-stroke, DOHC, 4-valves
Transmission6-speed
Front Suspension41mm KYB inverted fork, adjustable preload, rebound and compression damping; 5.1-in travel
Rear SuspensionSingle shock, adjustable preload and rebound damping; 5.1-in travel

Summary

Introduction

To the New Owner

Notice

How to Use This Manual

Particularly Important Information

Explains the meaning of safety alert symbols like Warning, Caution, and Note.

Finding the Required Page

Guides users on locating specific topics using the manual's structure and chapter layout.

Manual Format

How to Read Descriptions

Symbols

Chapter 1 General Information

Give Safety the Right of Way

Emphasizes safety and defensive riding practices for motorcyclists.

Instrument and Control Functions

Details the operation of the motorcycle's instruments, switches, and controls.

Operation and Important Riding Points

Provides essential operating procedures and key points for safe riding.

Troubleshooting

Offers guidance on diagnosing and resolving common operational issues.

Chapter 2 Specifications

General Specifications

Details physical dimensions, weight, and load capacity of the motorcycle.

Engine Specifications

Provides technical data related to the engine's performance and components.

Chassis Specifications

Lists specifications for the motorcycle's chassis, suspension, and wheels.

Electrical Specifications

Details technical data for the motorcycle's electrical system components.

Chapter 3 Periodic Checks and Adjustments

Periodic Maintenance and Lubrication Intervals

Specifies recommended maintenance schedules and lubrication intervals.

Adjusting the Valve Clearance

Details the procedure for measuring and adjusting valve clearances.

Changing the Engine Oil

Provides instructions for draining and refilling the engine oil.

Chapter 4 Overhauling the Engine

Camshafts

Procedures for servicing the camshafts and related components.

Cylinder Head

Steps for removing and installing the cylinder head.

Transmission

Procedures for servicing the transmission and its gears.

Chapter 5 Cooling System

Radiator and Thermostat

Procedures for removing and installing the radiator and thermostat.

Chapter 6 Electronic Fuel Injection

Electronic Fuel Injection

General information and procedures for the electronic fuel injection system.

Chapter 7 Chassis

Front Wheel and Brake Discs

Procedures for removing and servicing the front wheel and brake discs.

Front Brakes

Covers inspection and adjustment of the front brake system.

Front Suspension

Details inspection and adjustment of the front fork suspension.

Chapter 8 Electrical

Electrical Components

Overview of major electrical system components and their locations.

Ignition System

Explains the ignition system's circuit and troubleshooting.

Electric Starting System

Provides circuit diagram and troubleshooting for the starting system.

Charging System

Details the charging system's circuit and troubleshooting.

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