REAR SPROCKET STEEL 39 [JTR301/210.39] 520, DOUBLE DRILLED JTR301, JTR210, L17-0239, MX-80339

The Rear Drive Sprocket SR301-39.S.DR is a 39-tooth steel sprocket compatible with 520 chain size, featuring dual-fitment mounting holes: countersunk (CSK 8.5 mm) and plain (CTB 10.5 mm). It is constructed from high-carbon C45 steel, heat-treated, and finished in black powder coat or bright zinc plating for durability and corrosion resistance.

Features

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  Made with C45 high-carbon steel

  
  


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  Heat-treated and sandblasted to reduce surface tension

  
  


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  Dual bolt pattern: Countersunk 8.5 mm & Plain 10.5 mm

  
  


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  Finished in powder-coated black or silver BZP

  
  


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  Meets or exceeds motorcycle industry compound standards

  
  


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  Direct OEM replacement

  
  

Specifications

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  Tooth Count: 39

  
  


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  Chain Size: 520

  
  


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  Mounting: Dual fitment (CSK 8.5 mm and CTB 10.5 mm)

  
  


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  Part No.: SR301-39.S.DR

  
  

Cross-Reference OEM Part Numbers

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  JTR301.39

  
  


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  JTR210.39

  
  

Vehicle Fitments

Honda Off Road

• 
  

  CR125 RV 1997

  
  


• 
  

  CR250 RN, RP 1992–1993

  
  


• 
  

  CR250 RR 1994

  
  


• 
  

  CR250 RS

  
  


• 
  

  CR250 R-3 2003

  
  


• 
  

  CRF150 F-3,4,5 2003–2005

  
  


• 
  

  CRF150 F-6 to F-J 2006–2018

  
  


• 
  

  CRF250 R-A

  
  


• 
  

  CRF250 M-D, E, F 2013–2015

  
  


• 
  

  CRF250L 2013–2016

  
  


• 
  

  CRF450 R-4 to R-E 2004–2014

  
  


• 
  

  CRF450 R-F to R-J 2015–2018

  
  


• 
  

  CRF450 RX-H, J 2017–2018

  
  


• 
  

  XR250 RT to R-4 1996–2004

  
  


• 
  

  XR400 RT to R-4 1996–2004

  
  


• 
  

  XR600 1991–2001

  
  


• 
  

  XR650 R-Y to R-7 2000–2007

  
  


• 
  

  XR650 L-J 2018

  
  


• 
  

  CRM250 K, K2, L

  
  


• 
  

  CRM250 RP2MD24

  
  


• 
  

  CRM250 ARMD32

  
  


• 
  

  XR250 III S (Baja) 1996

  
  


• 
  

  XR250 S 1996

  
  


• 
  

  XR250 Baja

  
  

Honda Road

• 
  

  CRF230 M-9, A 2009–2010

  
  


• 
  

  XL250ME06

  
  


• 
  

  XL250 S2, 3S2MD30

  
  

Betamotor Off Road

• 
  

  250 RR 2T 2013–2018

  
  


• 
  

  300 RR 2T 2013–2018

  
  


• 
  

  390 RR 2015–2018

  
  


• 
  

  390 RS 2015–2016

  
  


• 
  

  430 RR 2015–2018

  
  


• 
  

  430 RS 2015–2016

  
  


• 
  

  450 RR 2013–2014

  
  


• 
  

  480 RR 2015–2018

  
  


• 
  

  498 RR 2013–2016