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TROUBLESHOOTING
ENGINEL.Aa<SPOWER
Possible cause
1. Raise wheel off the ground and spin by
hand
I
Wheel spins freely
I
2. Check tire pressure
I
Pressure normal
3. Accelerate rapidly from l o w to second
I
Engine speed reduced when clutch i s
released
4. Accelerate lightly
I
Engine speed increase
l
5. Check i g nition timing
I
Correct
Wheels do not
spin freely
Pressure l o w
Engine speed
doesn't change
accordingly
when clutch
is released
Engine speed does
not increase
Incorrect
Brake dragging
Worn or damaged wheel bearing
Drive chain too tight
Faulty tire valve
Punclured tire
Clutch slipping
Worn clutch discs/plates
Warped clutch discs/plates
Weak clutch spring
Additive i n engine oil
SE valve knob ON position
Clogged air cleaner
Restricted fuel flow
Clogged muffler
- •
Faulty ignition control module
Faulty ignition pulse generator
6. Test cylinder compression
I
Normal
7. Check carburetor for clogging
I
Not clogged
I
8. Remove spark plug
I
Not fouled or discolored
9. Check oil level and condition
I
Correct
·········-- Incorrect
·························- Clogged
Fouled or
discolored
Incorrect
Valve stuck open
Worn cylinder and piston rings
Leaking cylinder head gasket
I m proper valve timing
---··········- •
Carburetor not serviced frequently
enough
Plug not serviced frequently enough
Spark plug i s the i n correct heat range
Oil level too high
Oil level too l o w
Contaminated oil
10. Remove cylinder head cover and i n spect -· Valve train not ---- ·······- •
lubrication
lubricated
properly
Valve train lubricated properly
I
20-2
Clogged oil passage
Clogged oil control orifice
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