CFMoto CF500 - Page 252

19. Troubleshooting
Complaint Symptom and Possible Causes Remedy
Valve Chatter
1. Excessive valve clearance
2. Worn or broken valve spring
3. Worn rocker arm or camshaft
Replace
Replace
Replace
Noise from Piston
1. Worn piston
2. Worn cylinder
3. Carbon deposit in combustion chamber
4. Worn piston pin or pin hole
5. Worn piston ring or piston ring groove
Replace
Replace
Clean
Replace
Replace
Noise from Timing chain
1. Stretched chain
2. Worn sprocket wheel
3. Faulty chain tensioner
Replace chain & sprocket
Replace chain & sprocket
Repair or replace
Noise from Clutch
1. Worn or damaged crankshaft spline
2. Worn inner race spline
Replace crankshaft
Replace inner race
Noise from Crankshaft
1. Rattling bearing
2. Worn or burnt crank pin bearing
3. Excessive thrust clearance
Replace
Replace
Replace
Noise from CVT
1. Worn or slipping drive belt
2. Worn rollers in primary sheave
Replace
Replace
Engine is
noisy
Noise from Transmission
1. Worn or damaged gear
2. Worn or damaged input or output shafts
3. Worn bearing
4. Worn bushing
Replace
Replace
Replace
Replace
Slipping
Clutch
1. Worn or damaged clutch shoes
2. Weakened clutch shoe spring
3. Worn clutch housing
4. Worn or slipping drive belt
Replace
Replace
Replace
REplace
19-3