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JT Sprockets 420 To 428 Conversion Front Countershaft Sprocket

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JT 420 To 428 Conversion Front Countershaft Sprocket

Stop replacing chain and sprockets as much with one of these 420 to 428 JT conversion countershaft sprockets. Allows you to run the stronger 428 chain rather than the stock 420.
  • Allows you to run the stronger 428 chain over the standard 420 size
  • JT Sprockets are made exclusively from the finest Japanese 545C high carbon steel
  • Heat treated and hand finished to meet or exceed OEM standards
  • Outlasts any mild steel or surface hardened sprocket as much as two and three times over
  • Item # 44678
  • SKU #
  • Mfr. Part #

FitmentView All

Kawasaki Models

  • KDX80 : 1986–1988
  • KX100 : 1995–2009, 2011–2014
  • KX100 Monster Energy : 2009
  • KX60 : 1986–2003
  • KX65 : 2000–2009, 2011–2014
  • KX65 Monster Energy : 2009
  • KX80 : 1986–2000
  • KX80 Big Wheel : 1987–1994
  • KX85 : 2001–2014
  • KX85 Monster Energy : 2009

Suzuki Models

  • RM100 : 2003
  • RM60 : 2003
  • RM65 : 2003–2005

Yamaha Models

  • DT100 : 1977–1983
  • DT50 : 1988–1990
  • MX100 : 1979–1983
  • PW80 : 1991–2005
  • RT100 : 1990, 1992–2000
  • XT225 : 1992–2007

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