Yost Parts & Accessories

Yost Performance build the Power Tube — a CNC-machined brass replacement for the stock emulsion tube in Keihin CV40, S&S Super E/G, and Mikuni HSR carbs that atomises fuel into a finer mist. The result on a carburetted Harley is sharper throttle response and an end to the popping and spitting most riders just learn to live with.

One of the simplest bolt-in gains you can make to a carburetted bike, fitted in under an hour and obvious on the first ride. Worth speccing on a Shovelhead, Evo, or early Twin Cam still running its original carb.