REAR SPROCKET STEEL 42 JTR301/210.42 520, DOUBLE DRILLED JTR301, JTR210

The Rear Drive Sprocket SR301-42.S.DR is a 42-tooth steel sprocket designed for 520 chain applications. It features dual mounting hole configurations (countersunk CSK 8.5 mm and plain CTB 10.5 mm) for broad compatibility. Constructed from C45 high-carbon steel, it is heat-treated and sandblasted for durability and stress resistance, and finished in either powder-coated black or bright zinc plating.

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: 42

• Chain Size: 520

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

• Part No.: SR301-42.S.DR

Cross-Reference OEM Part Numbers

• JTR301.42

• JTR210.42

• L17-0242

• MX-80342

Vehicle Fitments

Honda Off Road

• 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

• CR250 R-3 2003

• CR250 RN, RP 1992–1993

• CR250 RR 1994

• CR250 RS

• CR125 RV 1997

• XR250 1990–2004

• XR250 RT to R-4 1996–2004

• XR400 RT to R-4 1996–2004

• XR600 1991–2001

• XR650 1993–2017

• XR650 R-Y to R-7 2000–2007

• XR650 L-J 2018

• XR250 III S (Baja) 1996

• XR250 S 1996

• XR250 Baja

• CRM250 K, K2, L

• CRM250 RP2MD24

• CRM250 ARMD32

Honda Road

• CRF230 M-9, A 2009–2010

• XL250 S2, 3S2MD30

• XL250ME06

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