Engine Lacks Power - KYMCO Super 8 50 Service Manual

1
. GENERAL INFORMATION

ENGINE LACKS POWER

1. Raise wheel off the ground
and spin by hand
Wheel spins freely
2. Check tire pressure
Pressure normal
3. Accelerate lightly
Engine speed increase
4. Check ignition timing
Correct
5. Test cylinder compression
Normal
6. Inspect fuel flow
Normal
7. Inspect the fuel injector
Normal
8. Remove spark plug
Not fouled or discolored
1-20
Wheels do not
spin freely
Pressure low
Engine speed does
not increase
Incorrect
Incorrect
Abnormal
Abnormal
Fouled or discolored
SUPER 8 50
Possible cause
 Brake dragging
 Worn or damaged wheel bearing
 Faulty tire valve
 Punctured tire
 Air cleaner dirty
 Restricted fuel flow
 Clogged muffler
 Pinched fuel tank breather
 Faulty ECU
 Faulty ignition pulse generator
 Valve stuck open
 Worn cylinder and piston rings
 Leaking head gasket
 Improper valve timing
 Faulty pressure regulator
 Faulty injector
 Faulty spark plug