Maintenance Procedures; Valve Clearance - HYOSUNG 2010 ST7 Service Manual

2-3 PERIODIC MAINTENANCE

MAINTENANCE PROCEDURES

This section describes the service procedures for
each item mentioned in the Periodic Maintenance chart.

VALVE CLEARANCE

Inspect Interval
Inspect Initial 1,000 km and Every 6,000 km thereafter.
CAUTION
The clearance specification is for COLD state.
Excessive valve clearance results in valve noise and
insufficient valve clearance results in valve damage and
reduce power.
Check the intake and exhaust valve clearances at the
distances indicated above and adjust the valve clear-
ances to specification, if necessary.
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 camshafts are removed.
Remove the radiator cover and radiator.
(Refer to page 2-5)
Remove the right air cleaner box.
Remove the seat and fuel tank. (Refer to page 5-2)
Remove the spark plugs. (Refer to page 2-5)
Remove the cylinder head cover
Remove the magneto cover plug
timing inspection plug
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
and .
and the valve
.
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)
FRONT CYLINDER
REAR CYLINDER
④
③
①
②