Sym SYM series, Manual, Page: 138 / 178

SYM 6. CYLINDER HEAD/VALVE
6-5
Remove the camshaft holder and rocker arm
set.
Remove the camshaft chain from the
camshaft sprocket.
Remove the cylinder head.
Camshaft Inspection
Inspect cam lobe height for damaged.
Service Limit
IN: Replacement when less than 20.570mm
EX: Replacement when less than 19.410
mm
Inspect the camshaft bearing for looseness
or wear out. If any, replace whole set of
camshaft and bearing.
Measure the valve rocker arm I.D.
Service Limit: Replace when it is above
10.100 mm
Measure the active O.D. of the valve rocker
arm shaft .
Service Limit: Replace when it is above
9.910 mm
Calculate the clearance between the rocker
arm shaft and the rocker arm.
Service Limit: Replace when it is above
0.10 mm