FMF Factory Fatty Pipe 025101 — KTM / Husqvarna / Gas Gas 50cc 2009-2023

Product Description

The FMF Factory Fatty Pipe is the gold standard in performance expansion chambers, bringing the legendary "works" pipe aesthetic and power characteristics to your 50cc machine. Designed for riders who demand championship-level performance, this pipe is engineered to broaden and smooth out the power delivery across the entire RPM range.

Crafted with precision, the Factory Fatty utilizes lightweight 20-gauge steel for the body and durable 19-gauge steel for the header. Featuring hand-pounded seams for optimal flow transitions, this pipe provides significant gains in low-end grunt, mid-range pull, and over-rev capability. It is the ultimate upgrade for any 50cc racer looking to gain a competitive edge.

Top Features: FMF Factory Fatty Pipe

• Broadens and smooths the power curve for improved rideability
• Delivers increased low-end, mid-range, and top-end over-rev
• Constructed from durable, lightweight steel (20-gauge body/19-gauge header)
• Hand-pounded seams ensure smooth exhaust flow and increased durability

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Will I need to change my jetting when installing the Factory Fatty?
A: Yes, adding a performance expansion chamber changes the engine's airflow characteristics. We highly recommend re-jetting your carburetor to ensure the engine runs at the correct air/fuel ratio for peak power and reliability.

Q: Is this pipe compatible with the stock silencer?
A: The Factory Fatty is designed to bolt onto the stock mounting points and is generally compatible with the factory silencer, though pairing it with an FMF Powercore silencer will yield the best results.

Expert Pro-Tip: Because these 50cc expansion chambers are made of thin-gauge steel to save weight, they are susceptible to denting. After washing your bike, coat the pipe in a light layer of WD-40 or a dedicated pipe conditioner to prevent surface rust, as the raw finish on Factory pipes is susceptible to oxidation.

Recommended Pairings:
o KTM 50 SX Performance Parts
o Husqvarna TC 50 Performance Parts
o Gas Gas MC 50 Performance Parts

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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