Yamaha YZ250F User Manual

VALVES AND VALVE SPRINGS
5-22
EAS1SM5220
VALVES AND VALVE SPRINGS
Removing the valves and valve springs
Order Part name Q’ty Remarks
Cylinder head
Refer to “CYLINDER HEAD” on page 5-18.
1
Valve lifter
4
2
Adjusting pad
4
3
Valve cotter
8
4
Valve spring retainer
4
5
Valve spring
4
6
Valve stem seal
4
7
Valve spring seat
4
8
Intake valve
2
9
Exhaust valve
2
For installation, reverse the removal proce-
dure.

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