Yamaha VMX12H Supplementary Service Manual page 88

VALVE CLEARANCE ADJUSTMENT
5
8.
Remove:
*Crankcase cover plate
*Special washer
plug
NOTE:
Check for clog of oil passage
If any, clean the oil passage.
Inspection and Adjustment
1. Measure:
*Valve clearance
NOTE:
Be sure piston is at Top Dead Center
when measuring clearance.
By the following measurement steps.
Valve clearance measurement steps:
*Turn the crankshaft counterclockwise with a
32
mm (1.26 in) socket wrench
NOTE:
Valve clearance must be measured when the
engine is cool to the touch.
*Align the mark (for the No. 1 cylinder)
"
on the flywheel with the stationary pointer
on the crankcase cover. When the
mark is aligned with the stationary pointer
,
the piston is a t top dead center TDC.
*Note marks on flywheel to obtain correct
valve clearance measurements.
TDC for No. 1 cylinder
TDC for No. 2 cylinder
the valve clearance using a Feeler
.
Record the measured amount ifthe clearance
is incorrect.
Intake Valve (cold):
-
-
0.11 0.15 mm
(0.004 0.006 in)
Exhaust Valve (cold):
0.30
0.26 mm)
0.012 in)
(0.010
in the bolt.
.