HER CHEE ATV-320 S Service Manual page 27

Chapter 1 Engine, Transmission & Gear
VALVE CLEARANCE
NOTE
◦ Inspect and adjust valve clearance while the
engine is cold (below 35 ℃/95℉).
Remove the cylinder head cover.
Remove the left crankcase recoil cover.
Remove the timing hole plug (oil filling plug) from
the right crankcase cover.
Remove the spark plug, this will make it easier to
turn the crankshaft.
Rotate the recoil drive pulley counterclockwise
and align the punch mark on the flywheel with
the index mark on the right crankcase cover to
bring the position to TDC (Top Dead Center) on
the compression stroke.
With the engine in this position, all four valves
can be checked.
Loosen the valve adjuster locknut and insert a
feeler gauge of the thickness as specified
between the valve stem and valve adjuster.
Turn the adjusting screw until the clearance is
correct then tighten the locknut
NOTE
◦ Start with the intake valves
Valve Clearance:
When the clearances are correct for all four
valves, install the cylinder head cover.
The remainder of installation is the reverse of
removal.
IN 0.15 mm (0.006 in)
EX 0.15 mm (0.006 in)
0.15mm (0.006in)
Feeler gauge
I-18