Improve the performance of your compatible two-stroke motorcycle with the FMF Fatty expansion chamber pipe, manufacturer part number 025238 and vendor part number 78-1545. Designed for select KTM, Husqvarna, and GasGas motocross models, this FMF pipe is engineered to support strong power delivery and responsive throttle performance across the usable riding range.
The FMF Fatty pipe is built for direct fitment on 2019–2021 Husqvarna TC 125, 2019–2021 KTM 125 SX, 2019–2021 KTM 150 SX, and 2021 GasGas MC 125 motorcycles. Its application-specific design helps maintain proper compatibility with the original motorcycle configuration, making it a practical replacement or performance upgrade for riders who demand dependable two-stroke response on the track.
FMF is known for developing high-performance exhaust components for powersports applications. This expansion chamber is suited to riders seeking a durable, purpose-built exhaust solution from a trusted manufacturer. Verify the motorcycle year, make, and model before ordering to ensure proper fitment. Professional installation is recommended, and exhaust springs, seals, and related mounting hardware should be inspected or replaced as needed during installation.
Features:
- Brand: FMF
- Product Type: Fatty two-stroke expansion chamber pipe
- Manufacturer Part Number: 025238
- Vendor Part Number: 78-1545
- Fitment: 2019–2021 Husqvarna TC 125
- Fitment: 2019–2021 KTM 125 SX
- Fitment: 2019–2021 KTM 150 SX
- Fitment: 2021 GasGas MC 125
- Performance: Designed to support responsive throttle control and strong two-stroke power delivery
- Application: Motocross replacement or performance exhaust component
Fitment:
2019 Husqvarna TC 125
2019 KTM 125 SX
2019 KTM 150 SX
2020 Husqvarna TC 125
2020 KTM 125 SX
2020 KTM 150 SX
2021 Gas-Gas Mc 125
2021 Husqvarna TC 125
2021 KTM 125 SX
2021 KTM 150 SX
2022 Gas-Gas Mc 125
2022 Husqvarna TC 125
2022 KTM 125 SX
2022 KTM 150 SX
2023 Gas-Gas Mc 125