Yamaha yz450f 2012 Service Manual

4-19
VALVES AND VALVE SPRINGS
VALVES AND VALVE SPRINGS
REMOVING THE VALVES AND VALVE SPRINGS
Order Part name Q'ty Remarks
Cylinder head Refer to "CYLINDER HEAD" section.
1 Valve lifter 4 Refer to removal section.
2 Adjusting pad 4 Refer to removal section.
3 Valve cotter 8 Refer to removal section.
4 Valve spring retainer 4
5 Valve spring 4
6 Valve stem seal 4
7 Valve spring seat 4
8 Exhaust valve 2
9 Intake valve 2

Yamaha yz450f 2012 Specifications

General

Bore x Stroke	97.0mm x 60.8mm
Compression Ratio	12.5:1
Fuel Delivery	Fuel Injection
Transmission	5-speed
Final Drive	Chain
Tires Front	80/100-21
Tires Rear	120/80-19
Wheelbase	58.7 in
Trail	4.6 in
Fuel Capacity	1.6 gal
Wet Weight	245 lb
Engine Type	Liquid-cooled, 4-stroke, DOHC, 4-valve
Ignition	TCI
Suspension Front	Telescopic fork, 12.2 in travel
Suspension Rear	Swingarm, 12.4 in travel
Brakes Front	Hydraulic single disc brake, 250mm
Brakes Rear	Single disc, 245 mm