Zontes ZT125-M 2022, Руководство по обслуживанию

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d. Use a 5# hexagon wrench to remove the M5×15-5#
hexagon socket head bolts and the rocker arm limit block on
the rocker arm shaft of the intake valve and the rocker arm
shaft of the exhaust valve respectively.
e. Measure the gap between the two intake valves and the
two exhaust valves with a feeler gauge. The measured values
are subject to a slight drag. Make a record of the four valve
clearance values measured.
f. Push the intake valve rocker arm and exhaust valve
rocker arm to the side of the timing driven sprocket to
expose the valve adjusting gasket. Then, according to the
standard value of valve clearance (intake valve: 0.08
～
0.12mm (0.003
～
0.005 in), exhaust valve: 0.18
～
0.22mm
(0.007
～
0.009 in), determine the specifications of the
adjusting gasket that needs to be replaced. For example: test
The left side intake valve clearance value is 0.04mm (0.002
in), which is less than the standard value. You need to
increase the clearance of 0.04
～
0.08mm (0.002
～
0.003 in).
The thickness specification of the original adjusting gasket on
the engine is 2.36mm( 0.093in), you need to replace the
adjusting shim with 2.28
～
2.32mm (0.09
～
0.091 in).
According to this method, determine the specifications of the
adjusting shim for the four valves to be replaced, and place
them according to the records made before to prevent
mixing .
Caution: The thickness specification of laser marking on the
adjustment pad will be invisible or disappear due to
abrasion. At this time, you need to take it off and measure
the thickness with a micrometer! ! !
g. The adjusting shim is small and easy to fall into the
engine when it is taken out. The original adjusting shim can
be sucked out with a magnet rod. Then use tweezers to put
in the adjustment shim to be replaced. After replacing the
two adjusting shims on the same side, push the valve rocker
back to the side of the spark plug to press the valve adjusting
shims to prevent them from sliding out. Then replace the
valve clearance adjustment gasket on the other side in the
same way.