HYOSUNG TE 450 Service Manual page 22

● Remove the cylinder head cover.
The valve clearance specification is different for both
intake and exhaust valves.
Valve clearance adjustment must be checked and
adjusted :
1) at the time of periodic inspection,
2) when the valve mechanism is serviced, and
3) when the camshafts are removed for servicing.
● Remove the valve timing inspection plug ① .
● Remove the magneto cover cap ②
tool.
Cap plug wrench : 09910-36000
NOTE
� � The piston must be at top dead center (TDC)
on the compression stroke in order to check or
adjust the valve clearance.
� � The valve clearance should only be checked
when the engine is cold.
● Rotate the magneto rotor counter-clockwise with a
socket wrench to set the piston at TDC on the
compression stroke.
(Rotate the rotor until the "T" line on the magneto
rotor is aligned with the triangle mark on the
crankcase.)
● To inspect the valve clearance, insert a thickness
gauge between the tappet and the camshaft.
Valve clearance
IN.
EX.
Thickness gauge : 09900-20806
using the special
Standard (When cold)
0.10 � 0.20 mm (0.004 ~ 0.008 in)
0.20 � 0.30 mm (0.008 ~ 0.012 in)
PERIODIC MAINTENANCE 2-6
②
①