Bored Throttle Bodies is a process that will allow us to take the stock OEM product and increase the over all diameter of the bore to allow more air into the engine, several aspects of performance are improved,this gives the engine increased power and torque all over the power band of the engine and the biggest increase will be the upper mid range and the top end under full power.

Spears Racing’s Preparation of the High Flow Throttle Bodies is a multi-step process that includes: boring custom fit CAD designed throttle blades (this is done per job) we do not cut to the throttle plate size , we cut our plates to the bore size, and we also are reducing shaft profile (If needed), installing button head screws, milling topside and tumble polishing. By increasing air flow up to as much as 15%.

Gains from most of the Bored Throttle Bodies can be dependent on other modifications you have done to your engine. Generally speaking, anytime a throttle body is added, there will be some added horsepower. The amounts can range from 7 to 15% increase of RWHP depending on what other modifications are done to the engine.

This is a direct bolt on to your motorcycle, this will still allow you to use your stock OEM air box or if you would like to you can fit sets of individual air pods to your throttle bodies.

Once these throttle bodies are installed onto your Motorcycle you will need to Synchronize and will need to re-set your (TPS) Throttle Position Sensor for proper readings in your ECU and for fueling on your fuel controller,also always make sure that your fuel controller is set to a zero and does read 100% at full throttle.

We also offer an Exchange Service on most of our Throttle bodies

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