Big Gun Rev Box

If you are looking to swap out your stock 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

Fitment:

• CRF/XR 50 (All Years)
• CRF/XR70 (All Years)
• CRF/XR 100 (All Years)
• CRF/XR80 (All Years)