Aftermarket Carburetors


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  • Installing a V.O.E.S. for the Mikuni HSR carburetor

    Installing a V.O.E.S. for the Mikuni HSR carburetor

    Understanding the VOES

    When I got rid of my stock carb and installed a Mikuni HSR42 flat-side, I was a happy camper except for one thing. I seemed to have a bit less power in the low and mid rpm ranges.

    This, I discovered, was because the Mikuni HSR carbs have no TPS. The stock, Mikuni CV carb has a built in Throttle Position Sensor (TPS) that puts out a small, variable, voltage signal. This signal increases in voltage as the throttle is rolled on. The ignition module, a black...
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  • Fabricating a TPS Driver

    Fabricating a TPS Driver


    All Road Stars built before the fuel injected, 2008 models vary their ignition timing via a small sensor attached to the carburetor. This sensor is called the Throttle Position Sensor -- or TPS. Theoretically, the more you twist your right wrist, the more demand is placed on the engine, and the less the ignition timing should be advanced. In real life riding this theory has a few holes, but in my experience the TPS still out-performs other available methods...
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    Last edited by Tykes_Place; 03-03-2018, 05:55 PM.

  • Installing a Genesis Carburetor

    Installing a Genesis Carburetor


    Some Road Star owners love the stock, 40mm Mikuni, CV carburetor. Others favor their aftermarket Mikuni HSR 42mm or 45mm, while still others are sold out to the S&S Super-G, using an aftermarket manifold.

    However, it is hard to argue with the incredible performance of the Genesis Big Air, 48mm carb from P.S.I. It is an enormous improvement, as others have also written. See Appendix-A for more information and my experiences with this amazing carburetor....
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    Last edited by Tykes_Place; 03-03-2018, 05:42 PM.
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