FMF Racing Dirt Bike Factory 4.1 RCT Exhaust
1008-7673 (MFG #: 044455)
$1,459.99
Sale price
$1,459.99
Regular price
$1,459.99
Skip to product information
FMF Racing Dirt Bike Factory 4.1 RCT Exhaust for KTM 505 SXF Dirt Bike
FMF Racing Dirt Bike Factory 4.1 RCT Exhaust for KTM 505 SXF Dirt Bike
$1,459.99
Sale price
$1,459.99
Regular price
$1,459.99
SKU:1008-7673
My Garage
Select a ride to guarantee fitment.
My Garage
Add your vehicles to your garage. Several features will then be available to facilitate your searches.
- Store vehicles in your garage
- Easily find guaranteed fit products and accessories
- Get product recommendations
Available Online
Free shipping on orders over $99
Standard Fulfillment: -
Expedited Fulfillment: -
Lowest Price Guaranteed
Fast Shipping
Easy Returns
Description
FEATURES
- The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology both internally and externally
- In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering- moving the muffler closer to the motor to centralize mass
- Constructed from only aerospace grade materials that meet their exacting specifications and is manufactured 100% at their Southern California factory
- Massive power gains throughout the RPM range
- Huge weight savings
- RTS (Rapid Tuning System)
Technical Specifications
- MFG. Part Number 044455
Vehicle Information
KTM 505 SXF Dirt Bike (2007-2008)
The KTM 505 SXF, offered as a single "505 SX-F" model during the 2007 and 2008 model years, was renowned for its incredible torque and performance. This motocross machine featured a potent single-cylinder, four-stroke engine with a displacement of 477.5 ccm (also cited as 477.3 ccm or 478cc). Its engine specifications included a 100.0 mm bore, 60.8 mm stroke, and a 12.5:1 compression ratio, utilizing a Keihin MX FCR 41 carburetor and DOHC fuel control. While the core model remained consistent, the 2008 KTM 505 SX-F received targeted refinements. These updates, shared with the 450 SX-F, included new crank webs to increase inertia weight for smoother power delivery and improved handling. The clutch was enhanced with an additional plate and extra holes in the inner hub for greater durability. Furthermore, a new 96dBa silencer was fitted to meet the 2008 FIM standards, ensuring compliance and optimized exhaust performance. These changes aimed to refine an already powerful and competitive package. FAQ:
Q: How can I ensure this part fits my KTM 505 SXF?
A: To guarantee compatibility, please use our year and model selector available on this page.
Maintenance
| Component | Interval | Details |
| Oil Filter | Every 5 to 10 hours or 6,000 km | To be replaced with engine oil. Interval depends on use (5 h for race, 10 h for recreational). For 2007, an initial change at 1 h, then every 10 or 20 h is also mentioned. |
| Drive Chain | Check and lubricate regularly | Adjust tension according to specifications. The 2008 model typically uses a 520 chain with 118 links. |
| Spark Plug | Check and replace as needed | Adjust gap to 0.7 mm (2008) or 0.6 mm (2007). Type is CR9EKB for 2007. |
| Air Filter | Every 2 to 5 hours | Clean and re-oil regularly. More frequently for aggressive or race use. Do not operate without a filter. |
| Coolant | Check level regularly | Check when cold. Top up with a 50% antifreeze / 50% distilled water mixture if needed. Monitor for leaks. |
Maintenance intervals may vary. Consult the official owner's manual for precise information.