Recognising Ignition Problems - MINSK Repair Manual

Recognising Ignition Problems
Experienced mechanics are able to home straight to a problem because they
recognise the symptoms caused by faulty or improperly adjusted parts. The following
list summarises these symptoms and will help you to repair your bike quicker. Always
remember though that the best approach is to start from the beginning and then to
slowly isolate the problem in a methodical fashion. Do not assume anything.
Engine Suffers Erratic Loss of Power
1. dirty sparkplug
2. ailing sparkplug
3. hot engine
4. dirty oil in petrol
5. water in petrol
6. either brake is inadvertently on
causing extra strain on engine
7. flooding in the carburettor due to
float or sticky stopping pin washer
8. pinched petrol tube
9. too little petrol in carburettor due to
poorly adjusted float
10. wet sparkplug cap or sparkplug
wire
11. faulty start/stop switch
Engine Suddenly Dies
1. no petrol in the tank
2. faulty sparkplug
3. sparkplug failure
4. one of the electrical system's wires
breaks or becomes loose
5. blocked jets in the carburettor
6. clogged petrol filter or petrol tube
7. water in the start/stop switch
8. generator failure
9. electric box failure
10. transformer failure
©Digby Greenhalgh 2000
Minsk Repair Manual
Bike Backfires
1.
2.
3.
4.
5.
6.
Bike Starts But Weakens or Fails
When Going Fast
1.
2.
3.
4.
Engine Stalls When Not Moving
1.
2.
Bike Over Revs
1.
2.
24
dirty sparkplug
faulty sparkplug
improper timing in the generator
faulty coils in the generator
magnet too close to the transducer
coil
water in the engine cut-off switch
wet air filter
water in the carburettor
blocked accelerator jet in
carburettor
improper timing of the generator
too little petrol in the carburettor
due to poorly adjusted float tank
improperly adjusted idle screw on
the carburettor
tight accelerator cable
improperly shaped gate in
carburettor