REAR SPROCKET STEEL 51 JTR215.51 420 MX-21551

The Rear Drive Sprocket JTR215.51 with 51 teeth and 420 chain compatibility is designed for a variety of Honda off-road motorcycles, including CR80, CR85, and CRF150R models. Manufactured from high-quality C45 high-carbon steel and finished for durability, this sprocket offers a strong and reliable upgrade or replacement.

Features

• Made from C45 high-carbon steel

• Heat treated and sandblasted to reduce surface tension

• Finished in powder-coated black or bright zinc plated (BZP)

• Meets or exceeds motorcycle industry compound quality standards

• Direct OEM replacement

Specifications

• Tooth Count: 51

• Chain Size: 420

• Inner Diameter (I.D.): 110 mm

• Pitch Circle Diameter (PCD): 130 mm

• Mounting: 4 counter-sunk holes, 8.5 mm

• Finish: Silver

• Part No.: SR209-51.S.DR

Cross-Reference OEM Part Numbers

• JTR209.51

• MX-21551

• L17-0151

• MX-215451

• SR209-51.S.DR

Vehicle Fitments

• 1985 Honda CR80 RF (49T Standard)

• 1986 Honda CR80 RG (49T Standard)

• 1987 Honda CR80 RH (49T Standard)

• 1987–1991 Honda CR80 RJ, RK, RL, RM (49T Standard)

• 1992–1995 Honda CR80 RN, RP, RR, RS (49T Standard)

• 1996–2002 Honda CR80 RT, RV, RW, RX, RY, R-1, R-2 (49T Standard)

• 1996–2002 Honda CR80 R2-T, V, W, X, Y, 1, 2 Expert (54T Standard)

• 2003–2004 Honda CR85 R-3, R-4 (49T Standard)

• 2003–2004 Honda CR85 RB-3, RB-4 Expert (55T Standard)

• 2005–2007 Honda CR85 R-5, R-6, R-7 (49T Standard)

• 2005–2007 Honda CR85 RB-5, RB-6, RB-7 Expert (55T Standard)

• 2007–2018 Honda CRF150 R-7, R-8, R-9, A–J (50T Standard)

• 2007–2018 Honda CRF150 RB-7, RB-8, RB-9, A–J (56T Standard)