Baja Shifter 90 Model SF90 (double-seat): Owner’s Manual Version:1.0 April 2005
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D. Carburetor Adjustment
Never make unnecessary adjustments. The manufacturer recommended settings are correct for most
applications. It's not necessary to disassemble the screw unless the carburetor needs to be replaced. Prepare a
50r/w tachometer before the adjustment.
1) Warm up the engine for about 5~10 minutes;
2) Tighten the airscrew gently and back out 2-3/8 turns
anticlockwise;
3) Connect the tachometer, and adjust the throttle to limit
the idle speed (the standard value is 1500 RPM);
4) Slowly turn the airscrew anticlockwise; observe the RPM
of the engine, and stop the adjusting as the RPM reaches
the top speed;
5) Adjust the screw, and adjust the idle speed to an ideal value;
6) Repeat the steps d and e until the rotate speed of the engine
becomes stable.
Carburetor Idle Speed Adjust Screw
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