82
VI. SERVICE DATA
Engine - cont'd
Trouble Prohahle cause
Remedy
-
Engine operation
i~
erratic
at
high
speed.,. 9. Insufficient gasoline
is
fed
to
carburetor Clean
or
add
gasoline
(cont'd)
-
Exhau.,t gases arc very smoky. I. Excessive engine oil
Adjust oil level
Recheck with level
gauge
2 Worn cylinders and piston
ring.s
Replace
3. Worn valve guides
Replace
4.
Scored
or
scratched cylinders
Replace
Engine does not develop sufficient power.
I. Improper tappet adjustment Adjust
2
Weak
valve springs Replace
3. lmcorrect valve timing
Adjust
4.
Worn cylinders and piston rings
Replace
5.
Improper valve seating
Replace
6.
Incorrect ignition tinting
Adjust
7.
Defective
p<)ints
Repair
or
replace
&.
Incorrect plug gap Repair
9.
Clogged carburetor jets Clean
10. Incorrect float level
Adjust
11.
Clogged air cleaner element
Clean
Engine
is
overheating.
I
I.
Carbon deposits
on
cylinder head
Oecarbon
ize
2 lnsu fficien t engine oil Add
to
specified level
3. Defective oil pump
or
clogged
oil
Clean
passages
4.
Too
low a float level
Adjust
I
5.
Advanced
ign
it.ion timing (knocking)
Adjust
Frame
Trouble
Probable cause
Remedy
Steering
is
hard.
I.
Excessively tightened steering stem Adjust
2.
Damaged steering stem steel balls Replace
3.
Bent steering stem Replace
4. Low
tire
inflation
pressure
Adjust
5.
Excessively tightened steering cone
Adjust
Motorcycle pulls
to
one side. I. Unequal tension
of
left and right Replace
shock absorber springs
2
Bent front forks
Repair
or
replace
3. Bent front
ax
le
or
incorrect wheel
Replace
or
repair
aJignmenl
-
Fr
ont
wheel wobbles.
I.
Dcformcd rims Replace
2
Worn front wheel bearings
Replace
3. Loose spokes
Retighten
4.
Dcfecti"e
tire
Replace
5.
Loose ax le and related parts
Retight.en
Front
shock
absorb•"'
are spongy.
I.
Weak
springs Replac~
2 Insufficient damper oil
I
Add
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