Engine
-
cont'd
Trouble
Engine is noisy. (cont'd)
Clutch slips.
VI. SERVlCF
DATA
Probable cause
5. Crankshaft
I)
Loose crankshaft bearings
'.!)
Loose connecting
rod
big
ends
6. Noisy gears
1)
Worn transmission gears
or
inter
-
ference between
gears
2)
Worn splines
3)
Worn primary gear
or
interference
between gears
I. Improper clutch adjustment
(no
play
in
clutch
lever)
2 Weak
clutch
springs
3.
Wom
or
warped pressure pla1e
4.
Warped clutch plat.es
5.
Worn
or ·
warped
friction
dis.cs
Replace.
Replace
Replace
Replace
Replace
Adjust
Replace
Replace
Replace
Replace
Remedy
1-
------
-------
-
--
--,
1-
-
Clutch drags.
Transmission gears fail
to
be shifted
smoothly
or
sequentially.
1.
Improper clutch adjustment (excessive
play
of
clutch lever)
2 Unequal
clutch
spring 1ension
3. Warped clutch plates
Adjust
Replace
I.
Deformed shift drum stopper Repair
or
replace
2. Broken gearshift drum Replace
3. Deformed gearsltift forks Repair
or
replace
81
._
__
_____
______
___
_.__
_
____
_
_,
Change pedal fails
to
return.
Transmis.sion gears disengage accidentally.
I.
Broken gearshifl return spring Replace
2. Interference between crankcase and Repair
gearshift spindle
J.
Worn
main
shaft or countershafl
shifting gears
2 Bent ur worn gearsltift forks
Replace
Repair or replace
Replace 3. Weak gcarsltifl drum slopper sp,ing
------
+-
____
_;_
_ _
£nginc operation is erratic
at
low
speeds.
I.
Improper tappet adjustment
2 Improper cylinder head valve
seat
contact
3.
Defective valve guides
4.
I ncorrcct ignition timing
5.
Defective points
6.
Too large a poinl gap
7.
Weak spark l defective condenser
or
ignition coil)
8.
Incorrect float level
9.
Improper
,arbnrctor
air
screw adjustment
Engine operation
is
errJtic
at
high speeds.
I.
Weak
"alvc springs
2.
Incorrect
valve
tjming
3.
Too
small a plug
gap
(defective auto·
matic advancer)
4.
Retarded ignition timing
5.
Weak
point
arm spring
6.
l)efective ignition coil
7. Incorrect float level
(too
low)
8.
Clogged
air
cleaner clement
Adjust
Recondition
Replace
Adjust
Repair
Adjusl
Replace
Adjust
Adjust
Replace
Adjust
Adjust
Adjus1
Replace
Replace
Adjust
Clean
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