The duration is tuned using the “leak jet” located in the float bowl (part #42 on the schematic) If the leak jet is larger, gas leaks out of the accelerator pump bowl faster, therefore a shorter squirt. The accelerator pump system works as follows… a plunger is moved up and down with opening and closing of the throttle
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This plunger pushes against a diaphragm (part #47.
The standard leak jet is replaceable, but it ain’t easy (you have to remove the float bowl for access)
R&d’s power pump2 sells for $139.95 and allows for easy changes, both on the trail and the track. The bigger the leak jet, the more pressure is bled off, and the less fuel is squirted into the throat of the carburetor The smaller the leak jet, the less pressure is bled off, and the more fuel is squirted into the throat of the carburetor to help reduce hesistation when twisting the throttle Now that this is clear as mud, hope it helps.
We have the best prices on dirt bike, atv and motorcycle parts, apparel and accessories and offer excellent customer service. The leak jet is part of the accelerator pump How big it is controls how much gas returns, or leaks back into the bowl, and doesn't squirt out This changes the duration of the squirt
