Yamaha WR250F(N) Owner's Service Manual page 362

CYLINDER AND PISTON
3. Install:
Cylinder gasket 1
Cylinder 2
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-
ing chain cavity.
Be careful not to damage the timing chain
guide 4 during installation.
4. Install:
Bolt (cylinder) 5
4 - 48
ENG
10 Nm (1.0 m · kg, 7.2 ft · lb)