The FMF Factory Fatty Pipe is a high-performance replacement expansion chamber designed to improve power delivery across the usable RPM range. Manufacturer part number 025240, this FMF pipe is engineered for two-stroke motocross applications and is an appropriate fit for select KTM, Husqvarna, and GasGas models. Its tuned design helps enhance throttle response, midrange pull, and overall engine performance while maintaining the responsive character expected from a competition-focused two-stroke engine.
Fitment: This FMF Factory Fatty Pipe fits the 2019-2021 Husqvarna TC 125, 2019-2021 KTM 125 SX, 2019-2021 KTM 150 SX, and 2021 GasGas MC 125. Confirm the model year and motorcycle configuration before ordering to ensure proper compatibility. The pipe is intended as a direct performance-oriented replacement for the original expansion chamber and is designed to work with the listed engine and chassis applications.
FMF manufactures the Factory Fatty with a formed expansion-chamber profile that supports strong, predictable power characteristics for motocross riding and racing. The pipe's construction is built to withstand the demands of off-road use, while its application-specific design supports proper fitment around the motorcycle's frame and engine. Installation should follow the motorcycle manufacturer's service procedures, and replacement seals, springs, or mounting hardware should be inspected before installation.
Vendor part number: 78-1545FR. Manufacturer part number: 025240. Choose the FMF Factory Fatty Pipe when you want a purpose-built exhaust upgrade for compatible KTM, Husqvarna, and GasGas 125-150 two-stroke models.
Features:
- Performance: Tuned expansion chamber designed to improve throttle response and power delivery
- Application: Replacement pipe for select two-stroke motocross motorcycles
- Fitment: Fits 2019-2021 Husqvarna TC 125, 2019-2021 KTM 125 SX, 2019-2021 KTM 150 SX, and 2021 GasGas MC 125
- Brand: FMF
- Model: Factory Fatty
- Manufacturer Part Number: 025240
- Vendor Part Number: 78-1545FR
- Construction: Built for the demands of motocross and off-road riding
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