The RK 520 Quick Acceleration Chain and Sprocket Kit, manufacturer part number 9101-129PX and vendor part number 9101-129PX, is designed for BMW S1000 RR motorcycles from 2012 through 2018. This complete drivetrain kit combines performance-focused race gearing with durable steel components to support quick acceleration and responsive power delivery.
The kit includes RK’s premium 520 XW-ring sealed chain and a Driven steel-alloy front sprocket with a black case-hardened finish. The sealed-chain design helps retain lubricant and protect internal components from contamination, while the hardened sprocket is built to withstand the demands of spirited riding and repeated acceleration. The natural-finish kit is suited for riders seeking a practical performance upgrade without sacrificing drivetrain durability.
Engineered specifically for the BMW S1000 RR 2012–2018, the RK 9101-129PX kit provides compatible chain and sprocket components in one application-focused package. Its quick-acceleration gearing is intended to improve throttle response and launch performance, making it a suitable choice for track use, performance riding, or riders who want a more acceleration-oriented setup. Verify motorcycle year and model compatibility before installation.
Features:
- Application: Fits BMW S1000 RR motorcycles from 2012–2018
- Chain Size: 520-size XW-ring sealed chain
- Performance: Quick-acceleration race gearing for responsive power delivery
- Sprocket Construction: Driven steel-alloy front sprocket with black case-hardened finish
- Durability: Sealed-chain design helps retain lubricant and resist contamination
- Brand: RK
- Manufacturer Part Number: 9101-129PX
- Vendor Part Number: 9101-129PX
- Finish: Natural kit finish with black case-hardened front sprocket