BIG GUN - REV BOX - MINI MX - YAMAHA 40-R29

MFG Part Number: 40-R29

If you are looking to swap out the stock Yamaha TTR 125 CDI box, the Big Gun Over Rev Box is an affordable alternative to highly-priced OEM replacement boxes. It increases the overall RPM limit over the stock box and advances the timing curve.

Increases overall RPM limit
Advanced timing curve
Easy direct plug in replacement to stock CDI box
6 Month Limited Warranty