Yamaha YZ426F(M)/LC Owner's Service Manual page 184

VALVE CLEARANCE ADJUSTMENT
3 - 22
Install the timing chain tensioner.
Refer to "CAMSHAFTS" section in the
CHAPTER 4.
NOTE:
Refer to "CAMSHAFTS" section in the
CHAPTER 4.
Turn the crankshaft counterclockwise sev-
eral turns so that the installed parts settle
into the right position.
Recheck the valve clearance.
If the clearance is still incorrect, repeat all
the clearance adjustment steps until the
specified clearance is obtained.
7. Install:
All removed parts
NOTE:
Install all removed parts in reversed order of
their removal. Note the following points.
INSP
ADJ