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

• Made with C45 high-carbon steel

• Heat-treated and sandblasted to reduce surface tension

• Dual bolt pattern: Countersunk 8.5 mm & Plain 10.5 mm

• Finished in powder-coated black or silver BZP

• Meets or exceeds motorcycle industry compound standards

• Direct OEM replacement

Specifications

• Tooth Count: 39

• Chain Size: 520

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

• Part No.: SR301-39.S.DR

Cross-Reference OEM Part Numbers

• JTR301.39

• 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