BOLD MAGENTA part numbers are new for 2026 SPROCKETS PARTS-UNLIMITED.COM OFFROAD | 2026 SPROCKETS 663 FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # NOTES REAR SIZE PART # NOTES YAMAHA (CONT) YZ250F 01-06 13-48 520- 13 1212-1951 ST 50 1211-2649 BLK YZ250F 07-11 13-49 520- 13 1212-0512 SC 50 1210-2603 GR YZ250F 12-23 13-50 520-114 14 1212-1952 ST 50 1210-2806 TWBLU YZ250FX 15-22 13-51 520-114 14 1212-0830 SC 51 1210-2444 SC WR250F 01-06 13-52 520-114 51 1211-2580 BLU WR250F 07-10 13-50 520-114 51 1211-2650 BLK WR250F 11-19 13-50 520-114 52 1211-2581 BLU WR250F 20-23 (CONT) 13-51 520-114 52 1211-2651 BLK 52 1210-2807 TWGD BW350 87-88 14-37 520-76 12 JTF422-12 - - 13 JTF422-13 14 JTF422-14 TT350 86-87 14-50 520-108 13 1212-2008 ST 40 1211-2602 BLK 14 JTF575-14 44 JTR853-44 ST 15 JTF575-15 44 1211-2603 BLK 45 JTR853-45 ST 46 JTR853-46 ST 46 1211-2604 BLK 48 JTR853-48 ST 48 1211-2605 BLK 49 JTR853-49 ST 50 JTR853-50 ST 50 1211-2606 BLK 51 1211-2607 BLK 52 JTR853-52 ST XT350 85-00 19-55 428-130 19 JTF576-19 44 1210-2689 ST 47 JTR1842-47 ST 49 JTR1842-49 ST 50 JTR1842-50 ST 51 JTR1842-51 ST 52 1210-0418 ST 54 JTR1842-54 ST 55 JTR1842-55 ST DT360 74 15-44 520-104 12 1212-0520 SC - - MX360 73-74 15-51 520-106 13 1212-0521 SC RT1 70-71 14-39 520-102 14 1212-0522 SC RT1MX 70 14-44 520-110 15 JTF565-15 SC RT2 72 15-39 520-102 16 JTF565-16 RT3 73 15-39 520-102 RT1MX 70 14-44 520-110 DT400 75-76 14-40 520-104 12 1212-0520 SC - - 13 1212-0521 SC 14 1212-0522 SC 15 JTF565-15 SC 16 JTF565-16 DT400 77 16-40 520-102 10 JTF569-10 40 1211-2602 BLK DT400 78 16-43 520-102 11 JTF569-11 40 JTR853-40 ST IT400 77-78 15-46 520-106 12 JTF569-12 41 JTR853-41 ST IT400 79 14-46 520-102 13 JTF569-13 42 JTR853-42 ST YZ400 77-78 14-50 520-106 14 JTF569-14 43 JTR853-43 ST YZ400 79 14-50 520-108 15 JTF569-15 44 JTR853-44 ST IT425 80 14-46 520-102 16 JTF569-16 44 1211-2603 BLK 17 JTF569-17 45 JTR853-45 ST 46 JTR853-46 ST 46 1211-2604 BLK 48 JTR853-48 ST 48 1211-2605 BLK 49 JTR853-49 ST 50 JTR853-50 ST 50 1211-2606 BLK 51 1211-2607 BLK 52 JTR853-52 ST FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # NOTES REAR SIZE PART # NOTES YAMAHA (CONT) IT400 76 15-46 520-104 12 1212-0520 SC 40 1211-2602 BLK MX400 75 14-50 520-106 13 1212-2002 ST 40 JTR853-40 ST YZ400 76 14-50 520-106 13 1212-0521 SC 41 JTR853-41 ST 14 1212-2003 ST 42 JTR853-42 ST 14 1212-0522 SC 43 JTR853-43 ST 15 JTF565-15 SC 44 JTR853-44 ST 16 JTF565-16 44 1211-2603 BLK 45 JTR853-45 ST 46 JTR853-46 ST 46 1211-2604 BLK 48 JTR853-48 ST 48 1211-2605 BLK 49 JTR853-49 ST 50 JTR853-50 ST 50 1211-2606 BLK 51 1211-2607 BLK 52 JTR853-52 ST YZ400F 98 14-49 520-114 12 1212-0520 SC 40 1211-2602 BLK 13 1212-2002 ST 40 JTR853-40 ST 13 1212-0521 SC 41 JTR853-41 ST 14 1212-2003 ST 42 JTR853-42 ST 14 1212-0522 SC 43 JTR853-43 ST 15 JTF565-15 SC 44 JTR853-44 ST 16 JTF565-16 44 1211-2603 BLK 45 JTR853-45 ST 46 JTR853-46 ST 46 1211-2604 BLK 48 JTR853-48 ST 48 1211-2605 BLK 49 JTR853-49 ST 50 JTR853-50 ST 50 1211-2606 BLK 51 1211-2607 BLK 52 JTR853-52 ST WR400F 99-01 14-49 520-114 13 1212-0521 SC 48 1211-2577 BLU 15 JTF565-15 SC 49 1211-2578 BLU 50 1211-2579 BLU 51 1211-2580 BLU 52 1211-2581 BLU YZ/WR426F 00-02 14-50 520-114 13 1212-2002 ST 46 1210-2408 ST YZ450F 03-04 14-48 520-114 13 1212-0521 SC 47 1210-1550 ST YZ450F 05-06 14-51 520-114 14 1212-2003 ST 48 1210-2441 SC YZ450F 07-09 13-49 520-114 14 1212-0522 SC 48 1211-2577 BLU WR450F 03-06 14-50 520-114 15 JTF565-15 SC 48 1211-2647 BLK WR450F 07-19 13-50 520-114 15 1212-1277 RB 48 1210-2601 GR YZ450F 19-23 13-49 520- 16 1212-1278 RB 49 1210-2442 SC YZ450FX 16-23 13-50 520- 49 1211-2578 BLU 49 1211-2648 BLK 50 1210-2443 SC 50 1211-2579 BLU 50 1211-2649 BLK 50 1210-2603 GR - 50 1210-2806 TWBLU 51 1210-2444 SC 51 1211-2580 BLU 51 1211-2650 BLK 52 1211-2581 BLU 52 1211-2651 BLK - 52 1210-2807 TWGD JT SPROCKETS continued on next page. KEY TO NOTES: AL = Aluminum. LW = Lightweight front. RB = Rubber cushioned. SC= Self-cleaning steel. ST = Steel. BLK = RaceLite black aluminum sprocket. BLU = RaceLite blue aluminum sprocket. GLD = RaceLite gold aluminum sprocket. GR = Twinstar, graphite T6 aluminum center with high carbon steel outer ring.Also available in blue (TWBLU), and gold (TWGD). ORG = RaceLite orange aluminum sprocket. RED = RaceLite red aluminum sprocket. JT SPROCKETS (CONT)
RkJQdWJsaXNoZXIy OTcxOTk3