High Performance CDI Bicycle Engine Bike Motor Motorized Bike Part; This ignition coil is equipped with a performance spark plug wire, giving you less resistance and power loss than your stock CDI; Increase the efficiency of your engine with this high performance CDI; If you're getting less spark than before or just looking for a smoother ride, check out the Performance CDI Electron Ignition Coil and feel the performance; Cold weather and warm weather, it works better than standard cdi.