Gilera Nordwest, Workshop Manual

Page: 111 / 136

Control unit test
A common tester results isn’t able to take any readings; therefore it is
advisable to replace the CDI control unit.
Spark plug cap resistance: 1 k
Ω
(fig. 5).
Replace if out of specification.
Spark plug
Check spark plug condition: in case it is
overheated, fouled or worn, replace it.
Measure electrode gap;
Gap 0.6 ÷ 0.7 mm.
If it is out of specification, clean and adjust it.
Spark plug must be checked every 1,000 km and replaced every 8,000 km.
Warning: The spark plug use, having different heat ranges or incorrect
thread, may cause serious damages to the engine.
TROUBLESHOOTING
The engine start to run but not regularly
The following parts could be faulty:
Ignition Coil.
Control box.
Pick-up.
HT cable.
Spark plug.
Loose wires.
Incorrect spark advance.
Lack of spark to spark plug
Ignition not turned on.
Loose, broken or short-circuited electrical wires between;
Ignition coil and spark plug.
Pick-up and ignition control unit.
Control unit and ignition coil.
Ignition coil faulty.
Control unit faulty.
Pick-up faulty.
Attention: If the battery tension is lower than 6 V, the engine won’t start
due to a special device.
17 - 5,2