JT Sprockets
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JT Sprockets 525 Steel Rear Sprocket, 42T (JTR3.42)

Part # JTR3.42
Item #206903
Fits 9 motorcycles
  • BMW
    • F650 GS (JTR3.41 for 10.5mm bolts) · 2008–2012
    • F650 GS SE · 2012
    • F700 GS · 2013–2018
    • F800 GS (JTR3.42 for 10.5mm bolts) · 2008–2018
    • F800 GS Adventure · 2013–2018
    • F800 GS Triple Black · 2012
    • F800 GS Trophy · 2012
    • F800 R (JTR3.47 for 10.5mm bolts) · 2009–2018
    • F800 R (JTR3.47 for 10.5mm bolts) · 2019–2020
$36.99
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WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
JT Sprockets Steel Rear Sprocket — JTR3.42 (42T)
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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