FMF Fatty Pipe 025019 for 2000–2003 KTM 125 SX

The FMF Fatty Pipe, manufacturer part number 025019 and vendor part number 025019, is designed for an all-around power increase across the power range of compatible KTM two-stroke motocross motorcycles. This performance expansion chamber improves power delivery throughout the engine’s operating range, making it a practical choice for riders seeking stronger, more usable performance from their 125 SX.

Finish and Construction: The pipe is electro-nickel plated for a durable, non-chip finish that resists discoloration during normal use. FMF Fatty pipes are engineered to provide broad power gains while maintaining responsive throttle control. The electro-nickel finish offers a clean appearance and added protection for off-road riding conditions.

Fitment: This FMF Fatty Pipe fits the 2000 KTM 125 SX, 2001 KTM 125 SX, 2002 KTM 125 SX, and 2003 KTM 125 SX. Verify the motorcycle model year and existing exhaust configuration before installation. The Fatty design is intended for riders who want balanced performance improvements throughout the powerband rather than a power increase limited to low or high engine speeds.

FMF offers several pipe profiles for different riding requirements, including Gnarly models for additional low-end torque and Factory Rev models for stronger middle- and upper-RPM performance. The Fatty configuration provides the versatile, all-around power characteristics commonly suited to motocross and general off-road riding. Installation should be completed using the appropriate mounting hardware, seals, and manufacturer-recommended procedures.

Features:

• All-around power increase throughout the power range

• Electro-nickel-plated finish helps resist chipping and discoloration

• Performance expansion chamber designed for responsive two-stroke power delivery

• Fits 2000–2003 KTM 125 SX models

• FMF Fatty profile provides balanced performance across the powerband

• Brand: FMF

• Manufacturer part number: 025019

• Vendor part number: 025019