Condition
Excessive engine oil
consumption
2-2. CARBURETOR
Condition
Fuel overflow from
carburetor
2-3. EXHAUST AND MUFFLER
Condition
Poor muffling per-
formance
2-4. CLUTCH
Condition
Slipping clutch
Possible cause
"Oil pumping" (Oil finding its way into
combustion chambers.)
1. Sticky piston ring
2. Worn piston ring groove and ring
3. Worn pistons or cylinders
Oil leakage along valve stems
1. Defective valve stem oil seals
2. Badly worn valve stem
Possible cause
2. Float level set too high
3. Float ruptured and containing some fuel
4. Broken or otherwise defective gasket
5. Loose float chamber securing screws
Possible cause
1. Loose exhaust pipe connection
2. Broken muffler gasket
3. Broken manifold, pipe or muffler
4. Exhaust manifold loose in place
5. Interference between body and muffler
Possible cause
1.
Loss of clearance at the tip of release fork
2. Clutch facings dirty with oil
3. Clutch facings excessively worn
4. Weakened diaphragm spring
5. Distorted pressure plate or flywheel surface
6. Improper clutch pedal free travel
Correction
Remove carbon and
replace rings
Replace piston and ring
Replace pistons and
rebore as necessary
Replace
Replace
Correction
I
Clean or replace
Adjust as prescribed
Replace
Replace
Retighten
Correction
Retighten
Replace
Repair or replace
Retighten
Repair, eliminating any
contact
Correction
I
Adjust as prescribed
Replace
Replace
Replace
Replace
Adjust and, as necessary,
replace clutch facings
2-9