Zenoah BCX2600S - Manual (Page 24)

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9. Maintenance
MA14
6. While looking in the spark plug hole, pull the
starter rope slowly and bring the piston to the top
position. Check that both rocker arms should
move freely. If they do not, repeat this step. This
will be top of the compression stroke.
7. Using a flat feeler gauge, measure the clearance
between the valve stems and rocker arms.
(MA14)
(1) Feeler gauge (2) Rocker arm
(3) Adjusting nut (4) Gasket
The recommended clearance for both intake and
exhaust is .003~.006in, (0.076~0.152mm).
The feeler gauge should side between the
rocker arm and valve stem with a slight amount
of resistance, without binding.
8. If the clearance is not within specification, adjust
as follows:
a. Turn the adjusting nut using a 5/16 inch
(8mm) wrench or nut driver.(MA14)
To increase the clearance, turn the adjusting
nut counterclockwise.
To decrease the clearance, turn the adjusting
nut clockwise.
b. Recheck both valve clearances and adjust as
necessary.
9. Reinstall the rocker arm cover using a new
gasket. Torque the screw to 37~43 in-lbs
(4.1~4.7 N.m.).
10.Reinstall the engine cover. Check alignment of
the cover before tightening the screws.
Be sure to tighten the screws loosened in step
1.
11.Check the plug, see Replacing the Spark
Plug, and reinstall. Torque the spark plug to
100~110 in-lbs (11.3~12.3 N.m.).
Reinstall the spark plug wire.
■ FUEL FILTER
• When the engine runs short of fuel supply, check
the fuel cap and the fuel filter for blockage.
(MA15)
(1) Fuel filter
(1)
MA15