TROUBLESHOOTING
ENGINE LACKS POWER
1.
Drive Train Inspection
Raise the front wheel off the ground and spin it by hand.
Does the wheel spin freely?
NO - • Brake dragging
• Worn or damaged wheel bearings
• Bent axle
YES - GO TO STEP 2.
2.
Tire Pressure Inspection
Check the tire pressure.
Is the tire pressure correct?
NO - • Faulty tire valve
• Punctured tire
YES - GO TO STEP 3.
3. Clutch Inspection
Accelerate rapidly.
Does the engine speed change accordingly?
NO - • Clutch slipping
• Worn clutch shoes/outer
• Weak driven face spring
• Additive in engine oil
• Weight roller stuck
YES - GO TO STEP 4.
4. Engine Performance Inspection
Accelerate lightly.
Does the engine speed increase?
NO - • Faulty starting enrichment (SE) valve
Clogged air cleaner
Restricted fuel flow
Clogged muffler
Clogged fuel cap breather
Faulty fuel pump
YES - GO TO STEP 5.
5. Spark Plug Inspection
Remove and inspect the spark
plug.
Is the spark plug in good condition?
NO - • Plug not serviced frequently enough
• Incorrect spark plug heat range
• Incorrect spark plug gap
YES - GO TO STEP 6.
6. Engine Oil Inspection
Check the oil level and condition.
Is the engine oil in good condition?
NO - • Oil level too high
• Oil level too low
• Contaminated oil
YES - GO TO STEP 7.
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