Yamaha WR450F(R) Owner's Service Manual page 151

With the rod fully wound and the chain
G
tensioner UP mark a facing upward,
install the gasket 1 and the chain ten-
sioner 2, and tighten the bolt 3 to the
specified torque.
Release the screwdriver, check the ten-
G
sioner rod to come out and tighten the
gasket 4 and the cap bolt 5 to the speci-
fied torque.
4
New
5
3. Turn:
G
4. Check:
G
G
4 - 28
ENG
CAMSHAFTS
Bolt (timing chain tensioner):
10 Nm (1.0 m • kg, 7.2 ft • lb)
Tensioner cap bolt:
7 Nm (0.7 m • kg, 5.1 ft • lb)
Crankshaft
Counterclockwise several turns
Rotor "I" mark
Align with the crankcase stationary
pointer.
Camshaft match marks
Align with the cylinder head surface.
Out of alignment → Adjust.