Causes of Problem

Remedy

• Incorrect electrode gap of spark plug

• Worn out electrodes of spark plug

• Fouled spark plug

• Aged spark plug

• Ignition timing too much advanced

• Insufficient/Interrupted HT voltage reaching to spark plug terminals

• Fuel leaking

• Idling speed setting too high

• Low compression

• Clogged air cleaner

• Sticky valves

• Incorrect valve clearance

• Clogged exhaust system

• High internal friction

• Overloaded engine

• Clutch slipping

• Brakes dragging

• Tyres under-inflated

• Gear shifting untimely/driving unsteady

• Adjust

• File and adjust gap

• Clean

• Replace

• Adjust

• Check the ignition system & rectify

• Rectify

• Adjust carburetor

• Rectify

• Clean/replace

• Clean/replace

• Adjust

• Clean

• Rectify

• Avoid overloading

• Adjust/replace clutch plate

• Adjust

• Inflate to correct pressure

• Improve driving habits