Jonway Ranger 250 Manual page 33

■CHECK SPARK PLUG
The untidily of spark plug electrode and exceed
windage effect on it's work.
<way of cleaning>
The best way is using cleaner of spark plug to
clean.
If have not cleaner, please use the needle brush.
<ADJUSTING>
·Windage of side pole:0.6-7mm
(reference drawing)
<Appointed spark plug>
G7HSA(NGK)\
U22FS-U(ND)
NOTE:Don't use the spark plug vhich isn't
appointed.
NOTICE:
· Notice not to scald body because of high
temperature of engine after stopping it.
· Twist into the spark plug with hands and
wrench