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Carburator
Idle adjustment
*Attention
The idle adjustment should be made when the engine is
warm.
It should be conducted after the warm-up of engine.
Start engine and connect the turnmeter of engine.
Adjust the accelerator pull wire and bolt stopper to specifiy
the winding number.
Winding number at idle speed ：1400±100rpm/min
Readjust the idle adjustment bolt when the gyration at idle
speed is instable or there is dificulty of slight acceleration.
Ignition timing
*Attention
The ignition timing requires no adjustment for CDI
ignition device.
Check the ignition system if the ignition timing is
incorrect.
Dismantle the left cover of engine.
Use the ignition timing light to inspect and confirm ignition
timing.
Cylinder pressure
It should be made when the engine is warm.
Dismantle spark plug.
Install cylinder pressure meter.
Full throttle, press "Start" to run motor and measure the
cylinder pressure.
Compression pressure：1.1-1.3Mpa/1400rpm
Check the following items if the compression pressure is too low:
—Damage of piston ring
—Ring wear
—Piston，cylinder wear
Check the combustion chamber and the carbon laydown on
the top of pistion if the compression pressure is too high.
Idle speed adjusting bol
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