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JT Sprockets 420 Steel Rear Sprocket (JTR832)

Part # JTR832.39
Item #207234
Fits 34 motorcycles
  • Yamaha
    • LB50 Chappy
    • LB50 · 1978–1982
    • DT50 MX Auto
    • DT50 MX Auto · 1986–1988
    • DTR50 (DT50R)
    • DTR50 (DT50R) · 1988–1996
    • FS1
    • FS1 DX
    • FS1 DX · 1978
    • FS1 E DX
    • FS1 EA
    • FS1 SE
    • GT MX D,E,F · 1977–1979
    • MX80 · 1980–1982
    • TY80
    • DT80 M
    • DT80 MX · 1983
    • DT80 · 1977–1983
    • GT80 · 1973–1982
    • DT50 M End. · 1978–1982
    • RD50 MX Auto
    • YSR50 · 1986–1992
    • DT50 M · 1978–1980
    • TY50 M · 1978–1981
    • RX50 · 1983–1984
    • YZ80 · 1974–1977
    • DT50
    • DT50 · 1983–1995
    • DT50 MX · 1981–1987
    • RD50 · 1977–1978
    • RD50 M Spoke Wheel · 1978
    • DT50 R · 1997–1998
    • DT50 R X-Limit
  • MBK
    • 50 X-Limit SM · 1997–1998
Regular price$13.99
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JT Sprockets 420 Steel Rear Sprocket (JTR832)
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.
  • Available in zinc-black (zbk) and self-cleaning (SC) variants on select tooth counts.
  • Built by JT Sprockets — the world's largest sprocket manufacturer, with sprocket production for major OE bike brands.
  • Sized for 520 pitch across stock and shorter/taller gearing options.

Spec: type: rear_sprocket · teeth: 39 · part_number: JTR832.39

Fitment

Fits 34 motorcycles across Yamaha, MBK — including Yamaha LB50 Chappy; Yamaha LB50 1978–1982; Yamaha DT50 MX Auto; Yamaha DT50 MX Auto 1986–1988; Yamaha DTR50 (DT50R); Yamaha DTR50 (DT50R) 1988–1996; Yamaha FS1; Yamaha FS1 DX. Verify fit for your exact bike with the fitment checker at garamoto.com.

Specifications

Sprocket PositionRear
MaterialC49 high carbon steel
Surface TreatmentHeat-treated and beadblasted
Best ForOff-road / Trail, Street

Verified from Garamoto’s catalog & fitment data.

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