APRILIA pegaso 650 i.e. Service Manual page 292

REPAIR INFORMATION
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DEFECT
The engine runs too nois-
ily
The clutch "slips"
The clutch does not "dis-
engage"
The clutch sticks during
engagement
Gears cannot be engaged
or are difficult to engage
8 - 6
- 00
SYMPTOM AND POSSIBLE CAUSES
Piston rings or grooves worn or broken
The noise seems to be coming from the clutch or clutch casing
Clutch discs worn
Sides of primary drive teeth worn
Bell housing, clutch hub and spring carrier disc worn
Flexible couplings on clutch housing have excessive play
Noise with clutch engaged – clutch bearings worn
Primary transmission worn or broken
The noise seems to be coming from the flywheel casing
Timing gears worn or broken
The noise seems to be coming from the crank gear
Connecting rod bearings worn
Driving shaft bushes or countershaft bearings worn
Excessive end play in drive shaft or balance shaft
Balance shaft gear unit faulty
The noise seems to be coming from the gearshift
Gears or propeller shafts worn or broken
Primary gear unit worn
Gearshift bearings worn
The noise is heard when the engine is started
Freewheel gear, gear or housing worn or faulty
Double gear or intermediate gear of the starter motor worn
Starter motor toothing broken
Clutch control adjusted incorrectly
Clutch clearance insufficient
Clutch discs worn or distorted
Clutch springs exhausted
Support plate worn or distorted
Motor oil not to spec.
Motor oil not to spec.
Clutch discs stuck together
Clutch discs or support plate distorted
Clutch housing worn
Clutch control adjusted incorrectly
Clutch discs worn or distorted
Clutch disc guide grooves inside clutch housing worn
Smooth disc guide grooves in clutch disc hub worn
Thrust-bearing surfaces of the clutch housing or support plate
worn
Engagement teeth of speed gears worn
Propeller shafts worn
Selector shaft gearshift mechanism faulty
Mechanism spring broken or worn
Index lever spring broken or worn
Selector lever return spring broken or worn
The gearshift forks are worn or distorted
See the subsection entitled (The clutch does not "disengage") for other possible
causes
Pegaso 650 I.E.
REMEDY
Replace (*)
Replace (*)
Change complete primary
drive (*)
Change worn component
(*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
Adjust slack with special
washer or shimming
washers (*)
Change split gears springs
(*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
Adjust
Adjust clutch clearance
Replace (*)
Replace (*)
Replace (*)
Use motor oil conforming to
spec.
Use motor oil conforming to
spec.
Clean or replace (*)
Replace (*)
Replace (*)
Adjust (*)
Replace (*)
Replace the clutch hous-
ing (*)
Replace the disc hub (*)
Replace (*)
Replace (*)
Replace (*)
Repair or replace (*)
Replace (*)
Replace (*)
Replace (*)
Replace (*)
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Release 00/2002-02