High-performance heavy-duty two-stroke expansion chamber engineered to deliver robust, tractor-like bottom-end and midrange power for final-generation Honda CR250R motocross and off-road applications. Constructed from tough 18-gauge carbon steel to withstand severe rock strikes, heavy trail abuse, and extreme thermal cycling while significantly improving low-end torque and throttle response.
Specs & Details
- Manufacturer Part Number: 78-1120
- Alternative Part Number: FMF 025015 / 1820-0504
- Component Type: 2-Stroke Expansion Chamber / Exhaust Pipe
- Material & Construction: Heavy-gauge 18-gauge carbon steel with a nickel-plated finish
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Honda | CR 250R | Two-Stroke Motocross / Off-Road | 2005–2007 |
TSO Garage Note
The ultimate armor upgrade for converting the final generation of Honda's legendary aluminum-frame CR250R into a woods or off-road machine. This heavy 18-gauge chamber fills out the bottom-end power delivery so you can hook up effortlessly in tight, technical terrain, while easily absorbing the brutal rock and log impacts that would crush a thin stock motocross pipe.
