Upgrade the power delivery of your two-stroke motocross bike with the FMF Factory Fatty Pipe, manufacturer part number 024073 and vendor part number 78-1313F. Designed for an all-around power increase throughout the rev range, this performance expansion chamber helps improve throttle response and usable power for riders who demand strong acceleration across the track.
The FMF Factory Fatty Pipe features an electro-nickel-plated finish designed to resist chipping and discoloration during regular riding and racing use. The Factory pipe includes hand-pounded welds and no coating, matching the appearance and construction style of FMF works bikes. This combination of performance-focused design and durable construction makes it a practical upgrade for serious Yamaha mini motocross applications.
Fitment includes the 2019–2025 Yamaha YZ85, as well as the 2022–2025 Yamaha YZ85LW models where specified. This FMF pipe is intended for riders seeking improved engine performance while retaining compatibility with the factory two-stroke platform. Verify the model year and configuration before installation to ensure proper fitment. Brand: FMF. Manufacturer part number: 024073. Vendor part number: 78-1313F.
Features:
- Power Increase: Designed to provide an all-around increase in power throughout the engine's usable power range.
- Electro-Nickel-Plated Finish: Helps resist chipping and discoloration for lasting appearance and durability.
- Factory Construction: Includes hand-pounded welds and an uncoated finish inspired by FMF works bikes.
- Fitment: Fits 2019–2025 Yamaha YZ85 models and 2022–2025 Yamaha YZ85LW models where specified.
- Brand and Part Number: FMF Factory Fatty pipe, manufacturer part number 024073 and vendor part number 78-1313F.
Fitment:
2019 Yamaha YZ85
2020 Yamaha YZ85
2021 Yamaha YZ85
2022 Yamaha YZ85
2022 Yamaha YZ85LW
2023 Yamaha YZ85
2023 Yamaha YZ85LW
2024 Yamaha YZ85
2024 Yamaha YZ85LW
2025 Yamaha YZ85
2026 Yamaha YZ85
2026 Yamaha YZ85LW