Dirt Racing Rear Sprocket Steel 42 [JTR301/210.42] 520, Double Drilled JTR301, JTR210

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⚠️ Fitment note: The Make/Model filter is for guidance only. Please verify model / year / engine size in the product description before purchase. The product description is the def initive fitment reference. If you’re unsure, message us and we’ll confirm fitment. 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 Show more