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Problem
Indication
Cause(s)
Solution
Blue exhaust smoke
Mechanical fault
Excess engine oil
Drain the excess engine oil
Piston ring worn out
Change
Valve pipe worn out
Change
Cylinder wall damage
Change
Valve rod worn out
Change
Valve gasket damage
Change
Lack of power
1. Fuel supply fault
Carburetor jet blocked
Clean/ Change
Improper fuel level in float bowl
Adjust the height
Air filter is not clean
Clean/ Change
Intake manifold leak
Tighten/ Change
Excess engine oil
Drain the excess engine oil
2. Electrical fault
Spark plug is not clean
Clean/ Change
Insufficient spark plug gap
Clean/ Adjust
Ignition coil defect
Change
CDI defect
Change
Magneto defect
Change
3.Mechanical fault
Incorrect valve clearance
Adjust
Valve spring weak
Check, remove or change
Improper air circulation
Adjust
Cylinder worn out
Change
Piston Ring worn out
Change
Cylinder head damage
Change/ Repair
Cranskshaft or cam shaft worn out
Change
(
I
)
Engine failure