Owner`s manual

Raider Classic 250 (double-seat): Owner’s Manual EEC Version:2.0 Feb. 2007
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C. 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.
a. Warm up the engine for about 5~10 minutes;
b. Tighten the airscrew gently and back out 2-3/8
turns anticlockwise;
c. Connect the tachometer, and adjust the throttle
to limit the idle speed (the standard value is
1500±100 RPM);
d. Slowly turn the airscrew anticlockwise; observe
the RPM of the engine, and stop the adjusting as
the RPM reaches the top speed;
e. Adjust the screw, and adjust the idle speed to an
ideal value;
f. Repeat the steps d and e until the rotate speed of
the engine becomes stable.