Assembly And Installation - Yamaha WR426F Handbuch

CAMSHAFTS
Timing chain tensioner
1. Check:
While pressing the tensioner rod lightly
G
with fingers, use a thin screwdriver 1
and wind the tensioner rod up fully
clockwise.
When releasing the screwdriver by
G
pressing lightly with fingers, make sure
that the tensioner rod will come out
smoothly.
If not, replace the tensioner assembly.
G

ASSEMBLY AND INSTALLATION

1. Install:
Exhaust camshaft 1
G
Intake camshaft 2
G
Installation steps:
Turn the crankshaft counterclockwise until
G
the "I" mark a on the rotor is aligned with
the stationary pointer b on the crankcase
cover.
Fit the timing chain 3 onto both camshaft
G
sprockets and install the camshafts on the
cylinder head.
NOTE:
The camshafts should be installed onto the
cylinder head so that the exhaust cam
sprocket punch mark c and the intake cam
sprocket punch mark d align with the sur-
face of the cylinder head.
CAUTION:
Do not turn the crankshaft during the
camshaft
improper valve timing will result.
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ENG
installation. Damage or