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3. INSPECTION/ADJUSTMENT MXU 300/250
Gap, Wear, and Fouling Deposits
Measure the spark plug gap.
Spark Plug Gap: 0.60.7 mm (0.002
0.003 in)
When installing, first screw in the spark
plug by hand and then tighten it with a
spark plug wrench.
Washer Deformation Cracks, Damage
Cylinder Head Cover
VALVE CLEARANCE
Inspect and adjust valve clearance while
the engine is cold (below 35).
Remove the cylinder head cover. (See
chapter 7)
Index Mark "T" Mark
Turn the flywheel clockwise so that the "T"
mark on the flywheel aligns with the index
mark on the right crankcase cover to bring
the round hole on the camshaft gear facing
up to the top dead center on the
compression stroke.
Inspect and adjust the valve clearance.
Valve Clearance: IN: 0.1 mm (0.004 in)
EX: 0.1 mm (0.004 in)
3-8