Fix It

Remove the bolts holding the cover of your scooters variator in place. The variator is a part of your scooters transmission system. It looks like two large sprockets connected by a rubber belt. There will be anywhere between six to ten bolts holding the cover in place.

Remove the lug nut holding the toothed sprocket in place.

Remove the transmission washer from the peg that is connected the belt to the toothed sprocket to increase your scooters speed or add a washer to the peg to decrease your scooters speed.

Replace the lug nut holding the toothed sprocket in place.

Replace the bolts holding the cover of your scooters variator in place.

Hold down all three buttons on the face of the Power Commander unit and turn on the bikes ignition. Release all the buttons once the engine is idling normally. The Power Commander manual recommends waiting approximately 20 seconds before making any adjustments.

Note the position of the indicator light on the "Fuel Richness Gauge." The three buttons along the bottom of the Power Commander represent the "High," "Mid" and "Low" areas of your engines rpm range. As you press each button, the Fuel Richness Gauge will display a quantity for each of the three areas.

Tap the button once to increase the richness of the fuel mixture, noting the increasing level on the Fuel Richness Gauge. Increasing the richness will increase acceleration and throttle response, but may also increase wear on the engine. Hold each button down to decrease the fuel richness where necessary.

Think about how your engine reacts at different speeds. If your bike accelerates sluggishly from a standing start but you encounter an unmanageable burst of speed at around 50 miles per hour, increase the "Low" meter and decrease the "Mid." This should redistribute the power more evenly across the engines range.

Allow the bike to idle for another 15 to 20 seconds after completing your adjustments. This will cause the Power Commander to save any changes you have made.

Locate the two idle mixture screws (one on each side) of the Holley carburetor and turn both screws carefully counterclockwise with a screwdriver until they bottom out and you feel resistance. Do not over-tighten the idle screws.

Turn both screws one-and-a-quarter turns clockwise with a screwdriver to find the idle adjustment starting point. Start the motor and allow it to warm up for about five minutes.

Remove the rubber vacuum hose from the metal vacuum port on the side of the carburetor and attach the vacuum gauge hose to the end of the port. Have someone place the car in gear and hold it still while you are adjusting the idle mixture screws.

Turn the idle screws one quarter-turn clockwise at a time in sequence with a screwdriver until you have the highest vacuum readings for both idle mixture screws. Put the car into park and leave it idling.

Repeat the procedure in Step 4, adjusting the idle mixture screws with a screwdriver while the vehicle is in park, until you get the highest vacuum readings. Remove the vacuum gauge from the carburetor vacuum port and reattach the vacuum hose to the port.