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JT Sprockets 428 Steel Rear Sprocket, 51T (JTR462.51)

Part # JTR462.51
Item #JT46251
Fits 25 motorcycles
  • Kawasaki
    • KX80 G1-G2,H2 >>> 428 Chain Conversion · 1986–1987
    • KX80 L2 >>> 428 Chain Conversion · 1989
    • KX80 L3 >>> 428 Chain Conversion · 1990
    • KX80 R1-R7 >>> 428 Chain Conversion · 1991–1997
    • KX100 C2 >>> 428 Chain Conversion · 1999
    • KX80 W1-W2 >>> 428 Chain Conversion · 1998–1999
    • KX85 A1-ADF,CEF-CNF,CNS,CNS,CPF,CRF.CSF >>> 428 Chain Conversion · 2001–2025
    • KLX140 A8F,A9F,AAF,ABF,ACF,ADF,AEF,AFF,AGF,AHF,AJF,AKF · 2008–2019
    • KLX140 ALF,AMF,ANF,APF,ARF · 2020–2024
    • KLX140 R (KLX140 ASFNN,ATFNN) · 2025–2026
    • KX80 W3 >>> 428 Chain Conversion · 2000
    • KX80 Y1-Y3 Big Wheel >>> 428 Chain Conversion · 1998–2000
    • KX85 B1-BDF,DEF-DLF Big Wheel >>> 428 Chain Conversion · 2001–2020
    • KX85 DMF,DNF,DPF,DRF Big Wheel >>> 428 Chain Conversion · 2021–2025
    • KX100 C1 >>> 428 Chain Conversion · 1998
    • KX100 C3,D1-D9F,DBF-DDF,FEF-FLF,FMF >>> 428 Chain Conversion · 2000–2021
    • KLX140L B8F,B9F,BAF,BBF,BCF,BDF,BEF,BFF,BGF,BHF,BJF,BKF · 2008–2019
    • KLX140L BLF,BMF,BNF,BPF,BRF · 2020–2024
    • KLX140 RL (KLX140 BSFNN,BTFNN) · 2025–2026
    • KX100 B7 >>> 428 Chain Conversion · 1997
    • KX80 J1-J2 >>> 428 Chain Conversion · 1986–1987
    • KX80 N2,N3 >>> 428 Chain Conversion · 1989–1990
    • KX80 T1-T7 Big Wheel >>> 428 Chain Conversion · 1991–1997
    • KX100 B1-B6 >>> 428 Chain Conversion · 1991–1996
  • Suzuki
    • RM100 K3 >>> 428 Chain Conversion · 2003
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WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
JT Sprockets Steel Rear Sprocket — JTR462.51 (51T)
Product Details

A C49 high-carbon steel rear sprocket — JT's bread-and-butter replacement that swaps in like the OEM part for hundreds of street and sport fitments.

  • C49 high-carbon steel, induction-hardened on the tooth crowns for wear life that outlasts cheap stamped aluminum on the street.
  • CNC-machined to OEM bolt pattern and profile so it lines up to your hub without modification.
  • Same fitment universe as JT's zinc-black (ZBK) and self-cleaning (SC) variants on this base.
  • Built by JT Sprockets — the world's largest sprocket manufacturer, with sprocket production for major OE bike brands.
  • Sized to OEM gearing with shorter/taller tooth-count options available on select fitments.

Intended use: street, sport, sport-touring, adventure.

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