Main wiring broken or short circuit
Ignition coil broken or short circuit
2.7.3
Poor idle
Dirty spark plugs
Incorrect spark plug gaps
Incorrect ignition timing
Dirty air filter
Faulty carburettor float needle valve
Faulty carburettor choke valve
Leaks in the contact of carburettor and inlet tube
Obstructed carburettor idle jet
Leaking head gasket
Severely worn cylinder, piston, piston rings
2.7.4
Poor acceleration and loss of power
Brakes binding
Air filter grill dirty
Dirty spark plugs
Incorrect spark plug gap
Incorrect ignition timing
Incorrect adjustment of carburettor
Faulty choke valve in carburettor
Dirty or obstructed carburettor jets
Faulty carburettor float needle valve
Dirty fuel filter
Blocked fuel lines
Leaking cylinder head gasket
Worn cylinder, piston, piston ring