4.
MOTORCYCLE COMPONENTS CHECKING AND ADJUSTING
A
s the motorcycle had been adjused and tested before delivery, there is no need to
make any readjustment. In case there is any fault with the motorcycle, trouble
shooting should be performed as the following:
4.1 Spark Plug Gap Adjusting
W
hen new spark Plug is used or after the motorcycle has been driven for1000 km,
spark plug gap should be checked with feeler gauge. If necessary, adjust the gap to
0.6-0.7mm.When the spark plug is needed to be cleaned, it should be cleaned in gasoline
with brush (use of metal wire brush is not allowed).
4.2 Mixture Valve Opening Checking and Adjusting
I
nadequate valve opening will directly affect the engine power, which will cause
difficult starting, unsteady idling, high fuel consumption and poor acceleration. So the
valve opening must be properly adjusted.
4.2.1
Open the valve chamber cover (Item 4 in Fig-7 )
4.2.2
Apply kickstarter to operate engine crankshaft so as to make the cylinder to be
adjusted be in final compression position, i.e.inlet valve opens fully and comes down
completely.At this moment, the pisiton has gone through a complete operating cycle
(from upper limit point to lower limit point and then from lower limit point to upper limit
point) .
4.2.3
Move the adjusting screw (Item 2 in Fig.7) with screw driver and check the
opening, which should be 0.06mm for hot cylinder and 0.1mm for cold cylinder.
4.2.4
If opening does not meet the requirement, loosen nut (Item 1 in Fig.7) and
readiust the opening.
4.2.5
Check repeatedly according to para.4.2.2 and 4.2.3 and then tighten the nut.
4.2.6
Refit the valve chamber cover.
4.2.7
If the opening is still too wide , which can not be adjusted, the relative parts
such as tappet should be changed.
