---
product_id: 135378623
title: "Fmf Racing Fatty Ktm50sx Pro Jnr Lc 01-08 Ktm50sx Pro Jnr Lc 01-08 Expansion Chamber Pn:025091"
brand: "fmf"
price: "A$93"
currency: AUD
in_stock: false
url: https://www.desertcart.com.au/products/135378623-fmf-racing-fatty-ktm50sx-pro-jnr-lc-01-08-ktm50sx
store_origin: AU
region: Australia
---

# 15 x 9.5 x 9.5 in dimensions OEM PN: 25091 2.78 lbs weight Fmf Racing Fatty Ktm50sx Pro Jnr Lc 01-08 Ktm50sx Pro Jnr Lc 01-08 Expansion Chamber Pn:025091

**Brand:** fmf
**Price:** A$93
**Availability:** ❌ Out of Stock

## Summary

> 🏁 Rev Up Your Adventure with FMF Racing!

## Quick Answers

- **What is this?** Fmf Racing Fatty Ktm50sx Pro Jnr Lc 01-08 Ktm50sx Pro Jnr Lc 01-08 Expansion Chamber Pn:025091 by fmf
- **How much does it cost?** A$93 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/135378623-fmf-racing-fatty-ktm50sx-pro-jnr-lc-01-08-ktm50sx)

## Best For

- fmf enthusiasts

## Why This Product

- Trusted fmf brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Fit:** Designed specifically for KTM50SX PRO JNR LC 01-08 models.
- • **Durable Design:** Crafted from polished stainless steel for longevity.
- • **Enhanced Power:** Experience improved throttle response and acceleration.
- • **Unleash Your Ride:** Transform your KTM50SX with FMF's precision engineering.
- • **Lightweight Performance:** Weighing in at just 2.78 lbs for optimal agility.

## Overview

The FMF Racing Fatty Expansion Chamber (PN: 025091) is a high-performance exhaust system designed specifically for the KTM50SX PRO JNR LC models from 2001 to 2008. Weighing only 2.78 pounds and featuring a polished stainless steel finish, this expansion chamber enhances your bike's power and responsiveness, ensuring an exhilarating off-road experience.

## Description

With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you're looking for. Features: More tractable power, improved throttle control Provides power gains throughout entire power band Carbon steel with a nickel plated finish for maximum durability FMF Racing's Tru-Flo stamping process ensures a perfect fit and optimum performance. Can be used with FMF or stock silencer (unless noted) Their most popular 2-stroke pipe

## Features

- Offroad 2-Stroke > EXHAUST > Complete Systems > Full Systems
- Primary Color= Polished, Secondary Color= Stainless Steel
- Application: KTM50SX PRO JNR LC 01-08
- FMF Racing Full Systems 025091.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | FMF Racing |
| Brand | FMF |
| Item Weight | 2.78 pounds |
| Product Dimensions | 15 x 9.5 x 9.5 inches |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 025091 |
| OEM Part Number | 25091 |

## Images

![Fmf Racing Fatty Ktm50sx Pro Jnr Lc 01-08 Ktm50sx Pro Jnr Lc 01-08 Expansion Chamber Pn:025091 - Image 1](https://m.media-amazon.com/images/I/71iwyTN0bOL.jpg)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-23*