IAME X30 125cc RL - TaG, Assembly Instructions & User Manual

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- 22 - MAN-043E ENG
3.3 CARBURETTOR ADJUSTMENT GUIDE
1 T.O.
*
RICH LEAN
1
¼
T.O.
¾
T.O.
1
½
T.O.
*
T.O. = TURNS OPEN
Normally the correct setting of the mixture screws, after engine run-in, is the following:

L (close the screw completely and then open): 1 1/4 T.O. (1 turn and 15’)

H (close the screw completely and then open): 1 T.O. (1 turn)
Based on various factors as altitude, ambient temperature etc. It might be
necessary to reset the carburetor to optimize the performance of the engine.
WARNING:
Never lean too much as lean mixture will overheat engine and cause seizure
Do not force H or L closed. It may damage the precision machined orifice and render the carb. inserviceable.
The adjustment of screw must be performed with warm engine.
(H)
Adjust T.O. from closed to
approximately 1 1/6 T.O.
(1 turn and 10’)
(L)
Adjust T.O. from closed to approximately
1 T.O. (1 turn)
(I)
Close by further 1 ½ T.O.
after contact with throttle
lever.
Start the engine and warm it. If RPM too
high adjust counterclockwise until clutch is
disengaged.
If RPM
decreases
Turn c.c.w until. max. RPM is
reached.
Adjust further
fractionally for rich idle.
Trigger accelerator.
(L)
Slowly adjust clockwise.
If RPM
increases
Continue to turn clockwise
until max. RPM is reached.
Adjust c.c.w. fractionally for
rich idle.
Engine is now idling at max. attainable
RPM, or slightly lower on rich side.
Adjust I counterclockwise until 2.000 ÷
2.500 RPM is reached.
Recheck L screw for optimum setting
required.
Adjust H until best possible free speed is
reached. Turn clockwise for higher RPM.
Counterclockwise for lower RPM.
Adjust L slightly richer by
1/8 ÷ ¼ T.O.
Bad
acceleration
Return to idle and check acceleration for
quick response and smooth pick-up. Good
acceleration
Engine is ready to operate.
( I ) THROTTLE
SPEED SCREW
( H ) HIGH SPEED FUEL MIXTURE
( L ) LOW SPEED FUEL MIXTURE