Valve Clearance Adjustment - Yamaha RX10K Supplementary Service Manual

VALVE CLEARANCE ADJUSTMENT

VALVE CLEARANCE ADJUSTMENT
NOTE:
S Valve clearance adjustment should be made
S When the valve clearance is to be measured
1. Drain:
2. Remove:
3. Measure:
Checking steps:
S Turn the crankshaft clockwise.
S When piston #4 is at TDC on the compression
S Turn the crankshaft clockwise.
NOTE:
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
S Measure the valve clearance with a thickness
2-9
on a cold engine, at room temperature.
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke.
S Coolant
S Cylinder head cover
Refer to "CYLINDER HEAD" in CHAPTER 5.
S Timing plug
S Valve clearance
Out of specification ! Adjust.
Valve clearance (cold)
Intake valve
0.11 X 0.20 mm
(0.0043 X 0.0079 in)
Exhaust valve
0.21 X 0.25 mm
(0.0083 X 0.0098 in)
stroke, align the TDC mark a on the A.C.
magneto rotor with the mark b on the A.C.
magneto cover.
gauge 1 .
INSP
ADJ