Yamaha YZ426F, Owner'S Service Manual

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INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
5. Adjust:
●
Valve clearance
Adjustment steps:
●
Loosen the timing chain tensioner cap
bolt.
●
Remove the timing chain tensioner and
camshaft caps.
NOTE:
Remove the camshaft cap bolts in a criss-
cross pattern from the outside working
inwards.
●
Remove the camshaft (intake 1 and
exhaust 2 ).
NOTE:
Attach a wire 3 to the timing chain to pre-
vent it from falling into the crankcase.
●
Remove the decompression guide 4 ,
cable 5 , bolt 6 and decompression shaft
7 .
●
Remove the valve lifters 8 and the pads
9 .
NOTE:
●
Place a rag in the timing chain space to
prevent pads from falling into the crank-
case.
●
Identity each valve lifter and pad position
very carefully so that they can be rein-
stalled in their original place.
●
Select the proper pad using the pad
selecting table.
Pad range
Pad Availability:
25 increments
No. 120
~
No. 240
1.20 mm
~
2.40 mm
Pads are available in
0.05 mm increments
NOTE:
The thickness
a
of each pad is indicated in
hundreths of millimeters on the pad upper
surface.