42
Crank connecting
rod of the engine
1. The engine doesn’t
start or the
motorcycle breaks
down (when the
carburettor and
ignition plug work
well but the
compression pressure
is inadequate)
1. The piston ring is worn
out or broken;
2. The piston ring is stuck;
3. The air inlet valve leaks;
4. The air cylinder lid
leaks;
5. The starting spring is
broken;
6. The starting gear is worn
out.
1. Replace the piston;
2. Clean the piston ring;
3. Readjust or replace the
air inlet valve;
4. Replace the air
cylinder pad;
5. Replace it;
6. Replace it.
