10
JJ.
INSPECTION
AND
ADJUSTMENT
14. SPARK PLUG
I.
Remove tl,e spark plug
cap
from the spark plug.
Unscrew
the plug, using a spark plug wrench, and
remove the spark plug from
the
cylinder
head
2. Check the spark plug for
de
posits and electrode cro~o,i
A spark plug with burned electrodes
or
blistered
insulator should
be
replaced with a new one.
fouled
spark plug can be cleaned in spark plug cleaner
or
\\~th a
wire
brush.
3.
Using a feeler gauge, adjust the gap to specification.
Specified spark plug gap: 0.6-
0.?mm
(0.024-0.028-in.)
To adjust. bend the side electrode only.
4.
Clean the plug seat and screw the plug into the threaded
hole in the cylinder head.
15.
DRIVE
CHAIN
Checking drive chain tension
I.
Raise the rear
wheel
off
the ground with the main stand.
Shift the transmission
into
neutral.
2 Check the tension
of
the drive chain. This can he made
by
applying a thumb pressure
at
a poi
nt
midway
be-
tween the sprockets and measuring the
sag.
Specified sag: 20nun (3/4.Jn.)
3.
To
adjust, pt)' out the colter pin, loosen the rear axle
nut
and lock nuts, and turn tho adjusting bolts in
or
out
as
necessary.
The index marks on the right and left drive chain
adjusters should
be
alig,1ed
wi1h
the same notches in the
.side
scates
on
the
rear
fork.
4.
Tighten the rear axle
nut
Insert the cotter pin with
tJ,e
end th.rough
Lhe
ax
le and secure w,th the lock
nul
5.
Check the rear brake pedal play and,
if
neccssat)', adjust
Ori't't
chain
lubrication
L
Using
pliers,
remove
the
retajning
clip
from
the
chain
joint; take
0111
the chain from the sprockets.
2.
Wash
the removed chain in solvent and dt)' with a
compressed
air.
3.
Check
for
exces,sive
or
abnormal
wear
to the
chain
and
sprockeL1t
Replace
with a new one
if
worn
or
damaged
too badly beyond
use.
4.
Luhricate
the
chain
with
lubric~Hlts.
5.
Reinstall the drive chain.
Make
sure that the closed end
of
the
retaining
clip
is
in
the
normal
tlirClillOH
of
rotation.
6.
Adjust the chain tensmn.
Fig.
2-32
(1)
(2)
Spark plug gap
Side electrode
Fig.
2-33
Urive chain sag
Fig. 2-
34
(1)
(3)
(5)
Fig.
2-3S
(I)
(A)
Cotter pin
(2)
Index mark
(4)
Lock
nut
(6)
Retaining
c1ip
Rotating direction.
Rear axle nut
Scale notch
Adjusting bolt
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