13
3-5 Adjustment of valve clearance
The valve clearance must be measured when the gasoline engine is cold.
a)
Remove the bolts (M6×16), cylinder head
cover, gasket, spark plug cap and spark
plug
in turns
The oil will overflow after removing the cylinder cover, wipe off the spilled oil.
b) Rotate the crankshaft slightly to make the
piston be at the top dead center of the
compression stroke, be careful the false
timing, (insert the screwdriver into the spark
plug hole to detect the height of the plug)
c) Loosen the valve lock with 10 mm wrench,
the spacing between the valve lock top surface
and the valve adjusting nut top surface shall
be about 3 mm
d) Put the 0.15 mm feeler gauge at the location
shown in the drawing
e) Tighten the valve lock with 14 mm wrench
or loosen the valve adjusting nut until there is a
resistance when moving the feeler gauge
f) Fix the 14 mm wrench, tighten the valve
Feeler gauge
Hexagon flange bolt
Spark plug
Cylinder head
cover gasket
Cylinder head
cover
