The PROX 31.6443 Cam Chain is a high-quality replacement timing chain designed for select KTM, Husqvarna, and GasGas four-stroke motorcycles. Manufactured in Japan by BorgWarner, this cam chain is built to original equipment specifications for dependable fit, accurate timing, and long-lasting performance. It is engineered for riders and technicians seeking a reliable replacement for worn or stretched cam chain components.
Featuring a strong M-Type chain design, the PROX cam chain uses a specially heat-treated pin along with advanced pin and link connections. These construction details help provide excellent strength, smooth operation, and improved durability under demanding engine conditions. The chain supports consistent camshaft timing and is suited for performance-oriented off-road and motocross applications.
Fitment includes the 2023 KTM 450 SX-F, 2023 KTM 450 XC-F, 2023 Husqvarna FC 450, and 2023 Husqvarna FX 450. It also fits the 2024 KTM 450 SX-F, 2024 KTM 450 XC-F, 2024 KTM 500 EXC-F, 2024 GasGas EX 450F, 2024 GasGas MC 450F, and 2024 Husqvarna FE 450. Verify the motorcycle model and engine application before installation. This product is identified by PROX part number 31.6443 and is supplied as a direct-fit cam chain replacement for the listed applications.
Features:
- Manufactured in Japan by BorgWarner
- Designed to original equipment specifications
- Strong M-Type chain construction for demanding engine applications
- Heat-treated pin provides enhanced strength and durability
- Advanced pin and link connections support reliable performance
- Fits select 2023 and 2024 KTM, Husqvarna, and GasGas 450 models
- Brand: PROX
- Manufacturer part number: 31.6443
- Vendor part number: 31.6443
Fitment:
2023 Husqvarna FC 450
2023 Husqvarna FX 450
2023 KTM 450 SX-F
2023 KTM 450 XC-F
2024 Gas-Gas EX 450F
2024 Gas-Gas MC 450F
2024 Husqvarna FC 450
2024 Husqvarna FE 450
2024 Husqvarna FE 501
2024 Husqvarna FX 450
2024 KTM 450 SX-F
2024 KTM 450 XC-F
2024 KTM 500 EXC-F
2025 Gas-Gas EX 450F
2025 Gas-Gas MC 450F
2025 Husqvarna FC 450
2025 Husqvarna FE 450
2025 Husqvarna FE 501
2025 Husqvarna FX 450
2025 KTM 450 SX-F
2025 KTM 450 XC-F
2025 KTM 500 EXC-F