4-1
ZHEJIANG KAYO MOTOR CO., LTD.
Compressive
force
With
cylinder
pressure gauge
Abnormal
Cylinder and piston ring
worn, cylinder washer;
sand hole on compressive
position, air valve, piston
ring stuck
Carb mouth
Smooth
Stuck
Clean
Spark
Good condition
Worn, discolor
Clean
Engine
Normal
Overheated
Cylinder and piston worn,
low gas mixture, fuel poor
quality, carbon deposit,
ignition
advance,
cool
water system
Speed up
Normal
Instable knock
Carbon deposit, low gas
mixture, fuel poor quality,
ignition advance
Engine failure (low speed and idling)
Check as the sequences of below form
Item
Check/adjust
Trouble
Reason
Ignition time
Timing light
Correct
Incorrect
CDI problem
Air screw
On carburetor
Normal
Abnormal
High gas mixture
(release), low gas
mixture (tight)
No air