Yamaha WR250F Manuel D'atelier page 366

CYLINDER AND PISTON
3. Install:
Cylinder gasket 1
G
Cylinder 2
G
NOTE:
Install the cylinder with one hand while com-
pressing the piston rings with the other hand.
CAUTION:
Pass the timing chain 3 through the tim-
G
ing chain cavity.
Be careful not to damage the timing chain
G
guide 4 during installation.
4. Install:
Bolt (cylinder) 5
G
4 - 49
ENG
10 Nm (1.0 m · kg, 7.2 ft · lb)