Yamaha YZ250F User Manual

10
TUNING
CHASSIS ........................................................................................................10-1
SELECTION OF THE SECONDARY REDUCTION
RATIO (SPROCKET) ..............................................................................10-1
DRIVE AND REAR WHEEL SPROCKETS SETTING PARTS ................10-1
TIRE PRESSURE.....................................................................................10-2
FRONT FORK SETTING..........................................................................10-2
CHANGE IN AMOUNT AND CHARACTERISTICS OF FORK OIL..........10-2
SETTING OF SPRING AFTER REPLACEMENT ....................................10-3
FRONT FORK SETTING PARTS.............................................................10-3
REAR SUSPENSION SETTING ..............................................................10-3
CHOOSING SET LENGTH ......................................................................10-3
SETTING OF SPRING AFTER REPLACEMENT ....................................10-4
REAR SHOCK ABSORBER SETTING PARTS .......................................10-5
SUSPENSION SETTING (FRONT FORK)...............................................10-6
SUSPENSION SETTING (REAR SHOCK ABSORBER) .........................10-7

Yamaha YZ250F Specifications

General

Displacement	250cc
Bore x Stroke	77.0 mm x 53.6 mm
Final Drive	Chain
Suspension / Rear	KYB® single shock; fully adjustable, 12.5-in travel
Brakes / Front	Hydraulic single disc brake, 270mm
Brakes / Rear	Hydraulic single disc brake, 240mm
Fuel Capacity	1.6 gal
Engine Type	Liquid-cooled, DOHC, 4-stroke
Fuel Delivery	Fuel injection
Ignition	TCI
Transmission	5-speed; multiplate wet clutch
Suspension / Front	KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel
Tires / Front	80/100-21