Yamaha WR250R Service Manual page 186

c
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3. Install:
Dowel pin
G
Camshaft cap
G
Camshaft cap bolts
G
NOTE:
Lubricate the camshaft cap bolt threads with
G
engine oil.
Finger tighten the camshaft cap bolts.
G
4. Tighten:
Camshaft cap bolts
G
Camshaft cap bolt
10 Nm (1.0 m•kg, 7.2 ft•lb)
NOTE:
Tighten the camshaft cap bolts in the order of
the embossed numbers on the camshaft cap.
ECA13730
CAUTION:
The camshaft cap bolts must be tightened
evenly or damage to the cylinder head, cam-
shaft caps, and camshafts will result.
2
1
d
5-12
5 3
8 2
5. Install:
Timing chain tensioner
G
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Using a finger, push and insert timing chain
tensioner rod "1" into the timing chain
tensioner housing.
NOTE:
Push the timing chain tensioner rod in direction
"a", and turn the timing chain tensioner body "2"
in direction "b" until it stops.
b
b. Keep pressing the timing chain tensioner rod,
mount clip "3" into groove "4", and lock the
timing chain tensioner rod.
3 4
c. In the status of step "b", install the rod assem-
bly in the cylinder block.
NOTE:
Always use a new gasket.
Timing chain tensioner bolt
10 Nm (1.0 m•kg, 7.2 ft•lb)
CAMSHAFT
1 7
4 6
2
a
1
d
c