RFX Race 12 Teeth Gearbox output pinionRef : RFX00567A / 1123290003

RFX Race Sprocket 12 Teeth (Manufacturer Ref: FXFS 57-12 55ST)

Designed for motocross and use on small displacement bikes, this RFX front sprocket is CNC machined from high-strength steel and carburized for a high surface hardness (up to 60 Rockwell). Its silver finish and precise machining ensure a perfect fit on the output shaft; the standard version is compatible with 415 pitch chains.

• Number of Teeth: 12 teeth
• Material: Carburized alloy steel
• Color: Silver
• Chain Pitch: 415
• Version: Standard

A robust and precise front sprocket is a key element of the transmission: it allows for adjusting the gearing to modify acceleration and top speed according to your usage. The CNC machining with tight tolerances minimizes play with the chain and contributes to even wear, which is beneficial in motocross where starts and changes in throttle are frequent. Some RFX references also feature lightening holes to reduce rotating mass.

Common compatibilities (examples): KTM 50 SX MINI (2023), HUSQVARNA TC 50 MINI (2023), KTM 50 SX (2023).