Aeon 350cc, Service Manual

Page: 61 / 192

ENGINE
4-61
CAMSHAFT INSPECTION
1. Visually inspect each cam lobe and bearing for wear,
chafing or damage.
Cam Lobe Dimension
Intake- Height
Std: 35.64 mm
Limit: 35.60 mm
Intake- width
Std: 29.15 mm
Limit: 29.11 mm
Cam Lobe Dimension
Exhaust-Height
Std: 35.64 mm
Limit: 35.60 mm
Exhaust-width
Std: 29.15 mm
Limit: 29.11 mm
2. Thoroughly clean the cam shaft
3. Measure height of each cam lobe using a micrometer.
Replace cam if worn below minimum height.
Replace camshaft if damaged or if any part is worn
excessively.
4. Measure: camshaft run out
Replace camshaft if camshaft run out of specification.
CYLINDER HEAD REMOVAL
NOTE: Cam chain and tensioner must be removed.
If no crankshaft service is being performed, secure cam chain
with mechanics wire to avoid chain drop into the crankcase.
1. Loosen each of the four cylinder head nuts evenly 1/4 turn
each time in a cross pattern until loose.
2. Remove the cylinder bolts and taps the cam support tower
with a plastic hammer until loose.
3. After removing the camshaft and securing the cam chain,
tap cylinder head lightly with a plastic hammer until loose.
CAUTION
Tap only in reinforced areas or on thick parts of
cylinder head casting to avoid damaging casting.