Motorcycle Fast Gear Shift Sensor For Honda CB500X CBR500R CB500F CBR250RR AfricaTwin CRF1000L CBR300R How it works: There's a sensor integrated into the shift linkage that detects when the shifter moves and cues the bike's ECU to interrupt spark. So right as you're toeing the shifter there's a milliseconds-long cut in power that lets those gears down in the transmission shift over on their shafts, no clutch or throttle blip required. Fit for Honda CB500X CBR500R CB500F CBR250RR AfricaTwin CRF1000L CBR300R Package included: one set of Gear Shift Sensor