Joyner JNSZ800DL, Owner'S Manual, Page: 90 / 94

tensioner belt tightly.
3. Checking and adjusting valve clearance
The clearance between admission valve and exhaust valve is 0.13-0.18mm under cold status.
when measuring the clearance, you should make the work circle of rocker lean against the base
circle of cam, shown as in Fig .50 .
①
adjusting bolt of rocker
②
rocker nut
③
valve rod
Fig .50
When adjusting valve clearance, make the key slot center of timing sheave of camshaft connect
with the mark “.” On the flange. the connecting line corresponding to the mark “
↑
”on the back
cover and camshaft center should be 0
°
,120
°
,240
°
,and confirm that the cambered surface
of work circle of rocker has leaned against the base face circle of cam. And then adjust the
clearance between admission valves and exhaust valves of cylinder1,3,2 in turn. shown as in
Fig .51 .
adjusting No.3 cylinder adjusting No.2 cylinder clearance of valve
clearance of valve
adjusting No.3 cylinder timing sheave of camshaft
clearance of valve
Fig .51
g. Check and adjust firing advance angle
1. According to shown as in Fig .52 , it should be .4-0.5mm. check clearance of
platina contacts of distributor firstly, if it can not meet demand, you can unscrew
the fastening bolts
①②
of the distributor and adjust them.
About engine
41