Procom Programmable Performance CDI Fits Yamaha - 151232Programmable PROCOM Performance CDI allows you to adjust both timing and rev limit for the engine. All of the 9 preloaded timing maps provide a 500 RPM increase in RPM limit over stock and can be selected by simply turning a switch dial on the top of the unit. These maps were custom made for these UTVs and will offers different ignition timing for various conditions. This Procom Performance CDI also has a built in USB port and it comes with Windows