REAR SPROCKET ALLOY BLACK 251, JTA251.51BLK 7075-T6 Aluminium, SR251-51

CNC-machined from certified 7075-T6 Ergal, RaceLite rear sprockets pair ultra-low weight with race-ready strength. Engineered for extreme conditions, they cut rotating mass for quicker acceleration while maintaining exceptional wear resistance.

Features

• 7075-T6 Ergal aviation-grade aluminium construction


• Precision CNC machining to tight JT tolerances


• Ultra-low rotating mass for quicker acceleration


• Designed for extreme pro-race conditions


• High strength-to-weight ratio with excellent durability


• Clean, consistent tooth profile for smooth chain engagement

Specifications

• Material: 7075-T6 Ergal Aluminium


• Tooth count: 51


• Drive chain pitch: 520


• Colour: Black

Vehicle Fitment

Honda (Road) 

• 
  

  XR250 Tornado

  
  

Yamaha (Off Road) 

• YZ125 (1999-2026)


• YZ125 50th Anniversary Ed. (2024)


• YZ125 70th Anniversary Ed. (2026)


• YZ125 Monster Energy Ed (2025)


• YZ125 X (2020-2026)


• TT-R230 (2005-2026)


• WR250 F (1999-2000)


• WR250 F (Enduro Version) (2001)


• WR250 F (Off Road Version) (2001-2026)


• YZ250 (1999-2026)


• YZ250 50th Anniversary Edition (2024; 2026)


• YZ250 F (4-Stroke) (2001-2026)


• YZ250 F 50th Anniversary Edition (2024)


• YZ250 F 60th Anniversary Edition (2016)


• YZ250 F 70th Anniversary Edition (4-Stroke) (2026)


• YZ250 F Monster (2021-2023; 2025)


• YZ250 FX (2015-2026)


• YZ250 Monster (2022)


• YZ250 X (2016-2026)


• WR400 F (1999-2001)


• YZ400 F (1999)


• WR426 F (2001-2002)


• YZ426 F (2000-2002)


• WR450 F (2003-2026)


• YZ450 F (2003-2026)


• YZ450 F 50th Anniversary Ed. (2024)


• YZ450 F 60h Anniversary Edition (2016)


• YZ450 F 70th Anniversary Ed. (2026)


• YZ450 F Monster (2021-2023; 2025)


• YZ450 FX (2016-2026)