250GK (double-seat): Ownr`s Manual
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Prepare a 50r/w tachometer before adjustment.
a. Warm up the engine (5~10 min)
b. Tighten the airscrew gentle. Back out 2-3/8 turns counter clockwise.
c. Connect the tachometer, adjust the throttle to limit the idle speed. The standard value is (1700 RPM).
d. Turn the airscrew counter clockwise slowly and observe the RPM of the engine, stop adjusting as the
RPM reaches the top speed.
e. Adjust the screw and adjust the idle speed to an ideal value.
f. Repeat step 4 and 5 until the rotate speed of engine stables.
D. Cleaning Instructions
Keep your vehicle clean. With a clean rag, wipe off the dirt and oil from around controls. Wipe off any
spilled fuel and oil. Keep the engine clean of foreign objects and be sure to check that water tank fan is
free of debris for proper cooling.
E. Vehicle Lubrication
Lubricate the vehicle every 90 days of use. Apply several drops of oil in the specific points.