Yamaha WR250F(N) Owner's Service Manual page 318

CAMSHAFTS
CAUTION:
Do not turn the crankshaft during the
camshaft
improper valve timing will result.
Install the clips, camshaft caps 4 and
bolts (camshaft cap) 5.
Bolt (camshaft cap):
10 Nm (1.0 m • kg, 7.2 ft • lb)
NOTE:
Before removing the clips, cover the cylin-
der head with a clean rag to prevent the
clips from into the cylinder head cavity.
Apply the engine oil on the thread and con-
tact surface of the bolts (camshaft cap).
Tighten the bolts (camshaft cap) 5 in a
crisscross pattern.
CAUTION:
The bolts (camshaft cap) must be tight-
ened evenly or damage to the cylinder
head, camshaft caps and camshaft will
result.
2. Install:
Timing chain tensioner
Installation steps:
While pressing the tensioner rod lightly
with fingers, use a thin screwdriver and
wind the tensioner rod up fully clockwise.
With the rod fully wound and the chain
tensioner UP mark a facing upward,
install the gasket 1 and the timing chain
tensioner 2, and tighten the bolt 3 to the
specified torque.
Bolt (timing chain tensioner):
10 Nm (1.0 m • kg, 7.2 ft • lb)
4 - 26
ENG
installation. Damage or