High-performance two-stroke expansion chamber engineered to broaden the powerband across the entire RPM range, increasing low-end torque, mid-range punch, and top-end over-rev. Constructed using durable stamped steel with smooth hand-welded seams and a nickel-plated finish to deliver clean throttle response and maximum exhaust flow.
Specs & Details
- Manufacturer Part Number: 78-1317
- Alternative Part Number: FMF 020088 / 1820-0081
- Component Type: 2-Stroke Expansion Chamber / Exhaust Pipe
- Material & Construction: Stamped steel construction with nickel-plated finish
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 250 | Two-Stroke Motocross / Off-Road | 1995–1996 |
TSO Garage Note
The quintessential pipe upgrade for mid-90s steel-frame YZ250s. The Fatty levels out erratic power spikes and adds usable pull from off-idle all the way through over-rev, giving your 250 a much smoother, hit-on-demand power delivery that excels whether you're ripping track laps or hitting woods trails.
