Retail $1,499.00 ELIMINATING THE BUTTERFLY Ample air flow coupled with complete fuel atomization is an essential requirement in any high performance engine. Modern four stroke engines all utilize a butterfly valve in their throttle bodies. The disturbance in air flow due to the use of a butterfly valve diminishes any engines ability to reach is performance potential. Butterfly valves are positioned in the middle of the incoming air stream, splitting the air into two separate paths, right when the fuel is being injected. This diminishes the fuels opportunity to be dispersed evenly into the incoming air stream, which reduces fuel atomization and engine performance. ROTATING GATE VALVE (Patent Pending) Description continues - https://www.r1dean.com/shop/fuel-injection/honda-crf450r-genius-throttle-body/ Motocross Action product reviews: https://motocrossactionmag.com/mxa-team-tested-rd-genius-throttle-body/ I bought this for my 2021 CRf450, then broke my femur (car accident) The femur break was very bad and I've had to sell the bike and extra parts to pay for medical bills.