3. INSPECTION/ADJUSTMENT
3-12
MXU 500
Adjust by loosening the valve adjusting
screw lock-nut and turning the adjusting
screw until there is a slight drag on the
thickness gauge.
Valve clearance (when cold):
IN.: 0.1 mm (0.004 in)
EX.: 0.1 mm (0.004 in)
Apply oil to the valve adjusting screw lock-
nut threads and seating surface.
Hold the adjusting screw and tighten the
lock nut.
Special tool:
Valve adjusting wrench A120E00036
Torque: 0.9 kgf-m (9 N-m, 6.5 lbf-ft)
After tightening the lock nut, recheck the
valve clearance.
Install the removed parts in the reverse
order of removal.
CARBURETOR IDLE SPEED
Warm up the engine before this operation.
Start the engine and connect a tachometer.
Turn the throttle stop screw to obtain the
specified idle speed.
Idle Speed: 1500r100 rpm
When the engine misses or run erratic,
adjust the pilot screw (refer to the
“CARBURETOR
DISASSEMBLY/INSPECTION/
ASSEMBLY” section in the chapter 5).
Throttle Stop Screw
The engine must be warm for accurate
idle speed inspection and adjustment.
＊
Lock Nu
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