If everything in the transmission and clutch packs are mechanically working properly and you can manually hand shift the transmission through all the gears with the shift nub and tool under your ATV, this kit will force shift the transmission regardless of shift code being displayed. Does not require any modification to the ATV or wire harness and can be easily removed and saved for later use for diagnostics or emergencies or on-the-trail repairs. Does not require any timers or computers; utilizes common style relays found at any parts store. Timers are not needed for a constant mesh style hydraulic transmission bypass. Not for use on hydraulic style transmissions like Rincon.Quickly diagnose mechanical clutch or transmission failures by isolating the ESP electrical system from mechanical problems that can cause ES shift codes quickly and easily without ever pulling the clutch cover. One relay controls the upshift; the other relay controls the downshift while using your known good tested left handlebar up/down switches, a tested shift motor, and a healthy battery. Kits are made from quality components and professional construction. You will be pleased with the quality.High Quality Fits: 1998-2004 Foreman 450 ES only Fits all TE, FE, and ES models Note: Eliminates the need for angle sensors, speed sensors, shift computer, ECU, forward/reverse sensor, and the main wire harness. Installation: The kit plugs directly inline with your left handlebar up/down GREEN 10-wire connector. Route the wire up front under the front frame rail, then plug in the shift motor to the matching kit plug. Connect the battery to the terminals. Converts the ES system into a manual electric shift controlled transmission and will now function the same as a foot shift model with the ease of the touch of a button for an "On Demand" shift style. Also a great alternative for older electric shift ATVs equipped with computer controlled ESP systems requiring expensive or unavailable parts, or for vehicles with oversized tires or gear reduction installed that may confuse the shift computer and speed sensor, preventing proper shifting. Only requires a good battery, shift motor, and up/down shift buttons on the left handlebar control. Color: Black Material: ABS Package Contents: 1 set x Angle Sensor Bypass Harness Note: Lighting and display differences may cause the color of the item to appear slightly different from the real thing. Measurement error allowed is +/- 1-3 cm.