Big Gun Rev Box Tools Air-cooled engines run hotter when

Air-cooled engines run hotter when modified (with big bore kits) and/or subjected to heavy loads such as racing use

we couldn't wait for the OG model to arrive on US shores and the newest version has us with equal anticipation

Installation Note: It will save a lot of time and

Handlebars

2 1/4" longer than stock

Big Gun Rev Box Tools Air-cooled engines run hotter whenUpgrade your bike's performance with the Big Gun Rev Box, a cost effective alternative to expensive OEM CDI replacements. This plug and play unit increases RPM limits and advances timing curves for better performance. Compatible with multiple Honda models including CRF50, XR50, CRF70, and XR70. Maximize your ride today!