Yamaha YZ250F User Manual

CYLINDER AND PISTON
5-30
EAS1SM5227
CYLINDER AND PISTON
Removing the cylinder and piston
Order Part name Q’ty Remarks
Cylinder head
Refer to “CYLINDER HEAD” on page 5-18.
1
Cylinder body
1
2
Gaskets
1
3
Dowel pin
2
4
Piston pin clip
2
5
Piston pin
1
6
Piston
1
7
Piston ring set
1
For installation, reverse the removal proce-
dure.
1
2
3
4
4
5
6
7
10 Nm (1.0 m kgf, 7.2 ft Ibf)
T
.R.
10 Nm (1.0 m kgf, 7.2 ft Ibf)
T
.R.
E
E
New
New
New
LT
E

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