G2 Ergonomics Quick Turn Throttle KTM Duke/RC 125 200 390 with Delrin Bushings Quick Turn Throttle for Competition Use Only! Machined from 6061 aluminum in the USA! Self-lubricating Delrin bushings at each end of tube eliminate aluminum-to-aluminum contact and provide an ultra-smooth feel. Fits inside the stock throttle housing to stock cables. Works with all known aftermarket cruise controls.