Maintenance Procedures; Valve Clearance - HYOSUNG Aquil GV650 Service Manual

MAINTENANCE PROCEDURES

This section describes the service procedure for
each section of the periodic maintenance.

VALVE CLEARANCE

Inspect Interval
Inspect Initial 1,000 km and Every 6,000 km.
CAUTION
The clearance specification is for COLD state.
The valve clearance specification is different for
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 camshaft is disturbed by removing it
for servicing.
● Remove the radiator cover and radiator.
(Refer to page 2-6)
● Using the fuel tank stay, lift the rear end of the fuel
tank and prop it up. (Refer to page 2-2)
● Remove the spark plug. (Refer to page 2-6)
● Remove the cylinder head cover ① and ②.
● Remove the magneto cover plug ③ and the tim-
ing inspection plug ④.
● Rotate the magneto rotor counter-clockwise to set
the front cylinder' s piston at TDC (Top Dead
Center) of the compression stroke.
(Rotate the rotor until "
with the center of hole on the crankcase.)
● To inspect the front cylinder' s valve clearance, insert
the thickness gauge to the clearance between the
camshaft and the tappet.
Valve clearance
IN.
EX.
Thickness gauge : 09900 - 20806
｜
F"line on the rotor is aligned
Standard (When cold)
0.1 � 0.2 mm (0.004 ~ 0.008 in)
0.28 � 0.32 mm (0.011 ~ 0.013 in)
PERIODIC MAINTENANCE 2-4
①
[ FRONT CYLINDER ]
④
②
[ REAR CYLINDER ]
③