87
2. Electric System
problem
① Ignition time is late or early
②Spark is weak or no spark
Adjust ignition time
Check from plug to magneto
3. Air pass problem ①Leakage on engine
②Air filter is dirty
③Cylinder, piston, ring worn out
④Leakages on connecting face
⑤Block in exhaust pipe
⑥ Leakage on Air inlet pipe
Repair
Clean or change filter
Repair or change
Repair or change
Dredge
Repair or change
4. Engine cooling
system
① Block in water channel or radiator
② Air in Cooling system or coolant is
not enough
③ Water pump problem
④ Unsuitable coolant
⑤ Constant temperature unit problem
⑥ Fault on motor of fan or switch of
heat-sensor
Clear
Release air, refill
coolant
Change
Change
Change
Change
5. Miscellaneous ① Carbon accumulated on top of
piston
② Too many or less lube
③ Unsuitable lube used
Clear
Drain or Refill
Change
Noise from Noise on air valve ① Gap on valve is too big Adjust
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