KYMCO AK 550, Service Manual

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2.Periodic Maintenance AK 550
2-44
Valve Clearance
The valve clearance specification is only relevant if the engine is cold.
Inspection
Remove the timing inspection cap from the left side of the engine. And rotate the
crankshaft from the right side of the engine.
When installation, inspect the O-ring on the cap and replace it as needed.
Rotate the crankshaft to TDC mark.
And align the TDC mark at camshaft sprocket.
For correct engine timing the marks on the camshaft sprocket must be even with
the cylinder head mating surface at the same time the "T" mark is lined up with
the with the index notch in the timing inspection hole.
If this is not the case, rotate the crankshaft 360° clockwise until the "T" mark is
once again aligned with the notch on the case cover.
Note: Valve clearance measuring sequence: First to adjust the left cylinder
then turn the crankshaft clockwise 180° to adjust the right cylinder.