Both the 117-6H5-02 and the 117-63D-04 CDI Yamaha ignition packs are designed to remedy an inherent problem found on the OEM design. The OEM design of this 3 cylinder ignition system is subject to high failure largely due to moisture (such as humidity) penetrating the variable timing sensor. Plus, that timing sensor is connected to the engine throttle linkage arm, and itRead More »...