KYMCO X-Town 250 ABS Service Manual page 21

1. GENERAL INFORMATION
9. Check oil level and condition
Correct
10. Remove cylinder head cover
and inspect lubrication
Valve train lubricated properly
11. Check for engine overheating
Not overheating
12. Accelerate or run at high
speed
Engine does not knock
1-19
Incorrect
Valve train not
lubricated properly
Overheating
Engine knocks
 Lean fuel mixture
X-Town250/300 ABS
Possible cause
 Oil level too high
 Oil level too low
 Contaminated oil
 Clogged oil
 Clogged oil control orifice
 Fan motor not working
 Excessive carbon build-up in
combustion chamber
 Use of poor quality fuel
 Wrong type of fuel
 Drive and driven pulleys/clutch
slipping
 Worn piston and cylinder
 Worn type of fuel
 Excessive carbon build-up in
combustion chamber
 Ignition timing to advanced
(faulty ECU)