Aluminum Sprocket for KTM

NIBBI RACING · DRIVETRAIN COMPONENTS NIBBI Racing Aluminum Sprocket for KTM Built for riders looking to reduce rotating mass without compromising drivetrain strength, the NIBBI Racing Aluminum Sprocket is CNC-machined from 7075-T6 aluminum alloy and finished in a distinctive orange anodized coating. Available in 49T, 50T, 51T and 52T configurations, it is designed for compatible KTM off-road, enduro and motocross applications. Product Features Lightweight by Design A performance-focused sprocket combining lightweight aluminum construction, CNC machining and an open circular cutout structure. 7075-T6 Aluminum Alloy CNC-machined from high-strength 7075-T6 aluminum alloy to provide a lightweight alternative to conventional steel rear sprockets. Circular Cutout Design Large circular openings reduce unnecessary material in the sprocket body, helping lower overall weight while creating a distinctive racing-inspired look. Hard Anodized Surface The orange anodized finish enhances surface hardness and wear resistance while giving the drivetrain a highly visible performance appearance. Self-Cleaning Grooves The sprocket profile incorporates self-cleaning features designed to help move dirt and debris away from the chain contact area during off-road use. Reduced Rotating Mass Aluminum construction and extensive weight-relief machining help reduce rotating and unsprung mass compared with a typical steel sprocket design. Four Tooth Options Available in 49T, 50T, 51T and 52T options so riders can select gearing based on their motorcycle setup and intended riding conditions. Gearing Options Available Tooth Counts Select the required tooth count according to your motorcycle setup and desired final-drive gearing. 49T Rear Sprocket 50T Rear Sprocket 51T Rear Sprocket 52T Rear Sprocket Technical Information Specifications Specification Details Product Type Rear Motorcycle Sprocket Material 7075-T6 Aluminum Alloy Tooth Options 49T / 50T / 51T / 52T Inner Circle Diameter 4.92 in Bolt Center Distance 5.91 in Surface Finish Anodized Color Orange Design Lightweight Circular Cutout Structure Additional Feature Self-Cleaning Groove Design Vehicle Application KTM Fitment Reference The following KTM models are listed as compatible applications. Confirm the original sprocket mounting dimensions and drivetrain specification before purchase. Model Year Model Year 125 SX 1991–2024 350 EXC-F 2011–2024 125 EXC 1991–1998 350 SX-F 2011–2024 125 EXC 1999–2007 360 SX 1996–1997 125 EXC 2008–2016 380 SX 1998–2002 125 XC-W 2017–2019 380 EXC 1998–2002 125 XC 2021–2024 400 SX-F 1999–2002 144 SX 2008 400 LC4/E 1997–2001 150 XC-W 2017–2019 400 EXC-F 2000–2002 200 EXC 1998–1999 450 SX-F 2007–2024 200 EXC 2000–2010 450 EXC-F 2003–2024 200 EXC 2011–2016 450 SMR 2004–2014 200 MXC 1998–1999 450 SMR 2021–2024 200 MXC 2000–2010 500 EXC 2012–2024 250 SX 1995–2024 505 SX-F 2007–2012 250 EXC 1991–2024 520 EXC-F 2000–2002 250 SX-F 2006–2024 525 SX-F 2003–2012 250 EXC-F 2002–2003 525 EXC-F 2003–2012 250 EXC-F 2004–2024 525 SMR 2004–2005 300 SX 1990–1996 530 EXC-F 2008–2011 300 SX 2023–2024 625 SXC 2003–2007 Fitment & Gearing Notice Before ordering, verify the motorcycle model and year, sprocket bolt pattern, inner diameter, bolt-center dimensions, chain specification and required tooth count. Changing rear sprocket tooth count changes the final-drive ratio and may affect acceleration, engine RPM and road speed characteristics. Model and year alone should not replace dimensional verification of the original sprocket.