Air and Fuel› Fuel Injection Systems and Components - Electronic
Big Gun
Big Gun 2004 Kawasaki KX 250F Rev Box
SKU: B0AC 40-R12
Moderate — 2–4 hours
Description
Part #: 40-R12
If you are looking to swap out the 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.
MIA's Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Big Gun |
| Part Number | B0AC 40-R12 |
Videos
Raptor 700r biggun slip on exhaust & powerbox settings
Big Gun Exhaust Tech Talk - Power Box 101
Big Gun Power Box tuner *install* for King Quad 500
Big gun evo exhaust upgrade and power box raptor 700 2016
Yamaha Raptor 700r Big Gun Evo R exhaust installed
BigGun fuel tuner installed on 2022 Yamaha Raptor 700r
Big Gun Exhaust Tech Talk - Spark Arrestor & Vortex Installation
2017 Klx110L BBR Rev Box Install and POSITIVE Review
Ltr450 Big gun evo r slip on
Big Gun's recommended tune for the Highlifter 850, is it any good?
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy