High-performance heavy-duty two-stroke expansion chamber engineered to deliver robust, tractor-like bottom-end and midrange power for first-generation KTM 200 off-road and enduro 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: 78-1523
- Alternative Part Number: FMF 025006 / 1820-0084
- 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 |
| KTM | 200 SX / EXC / MXC | Two-Stroke Motocross / Off-Road | 1998–1999 |
TSO Garage Note
The ultimate trail armor for putting usable bottom-end grunt into early-generation KTM 200s. This heavy 18-gauge chamber beefs up low-end torque so you can lug through tight, technical singletrack without constantly slipping the clutch, while easily shrugging off the brutal rock and log strikes that would crush a stock pipe.
