Honda CRF50F 2004-2015 - Page 205

TROUBLESHOOTING
16-4
8. Spark Plug Inspection
Remove and inspect the spark plug.
Is the spark plug in good condition?
NO _ . Pl ug no t serviced frequently enoug h
• Incorrect spark plug heat range
YES - GO TO STEP 9.
9. Engine Oillnspeetion
Check the oil level and condition.
Is the engine oil in good condition?
NO _ . Oil level t oo high
• Oil level t oo low
• Contaminated oil
YES - GO TO STEP 10.
10. lubrication In spection
R emove cy lind er h ea d cover and inspect lubric ation.
Is the valve train lubricated properly?
NO _ . Clogged oil passage
• Clogged oil control orifice
YES - GOTDSTEP1' .
11 . Over Hea ting Insp ection
Check for engine over heating.
Is the engine over heating?
YES _ . Ex cessive carbon build - up in comb ust ion chamber
• Use of poor quality fuel
• Clutch
slipp ing
• lean fuel mixture
• Wrong type of fuel
NO
- GOTO STEP 12.
12 . Engine Knocking Insp ection
Accelerate or run at high speed.
Does the engine knock?
YES _. Worn piston and cylinder
• Wrong type of fuel
• Ex cessive c arbon build - up in com bustion chamber
• Ignition timing too advanced ( faulty ignition co ntr ol module)
• lean fuel mi xture