High-performance heavy-duty two-stroke expansion chamber engineered to deliver robust, tractor-like bottom-end and midrange power for late-90s and turn-of-the-millennium Kawasaki KX250 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: 78-1231
- Alternative Part Number: FMF 022019 / 1820-0063
- 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 |
| Kawasaki | KX 250 | Two-Stroke Motocross / Off-Road | 1997–2000 |
TSO Garage Note
The ultimate armor upgrade for transforming late-90s KX250 power into a tractable off-road or woods setup. This heavy 18-gauge chamber beefs up low-end torque so you can hook up in slick or technical terrain, while easily absorbing the brutal rock and stump impacts that would instantly crush a thin stock motocross pipe.
