All Years-Honda TRX250EX Recon AMRRACING STAGE 3 CDI REV Box upgrade Increased Rev Limit!,Increased Horsepower! Work with or without Digital Dash features,With a Hotter Spark! Improved Throttle Response Easier Starting Most Aggressive Timing Curve available! Eliminates stock ignition "cut out" Easy Plug & Play application, NON-Programmable, installs in minutes