BOLD MAGENTA part numbers are new for 2025 SPROCKETS PARTS-UNLIMITED.COM OFFROAD | 2025 SPROCKETS 631 SPROCKETS (CONT) FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # REAR SIZE PART # OPTIONAL COLOR YAMAHA (CONT) WR250F 11-13, 15-16 13-50 520-114 13T 1212-0991 46T R150A-520-46 Silver WR250F 17-19, 23 - 520-114 14T 1212-0992 47T R150A-520-47 Silver WR250F 20-24 - 520-116 48T 1211-0025 Black YZ250F 10-11 13-49 520-114 48T 1211-0164 Blue YZ250F 12-18 13-50 520-114 48T R150A-520-48 Silver YZ250F 19-25 - 520-114 49T 1211-0026 Black YZ250F 60th Anniversary 16 - 520-114 49T 1211-0165 Blue YZ250FX 15-22 - 520-114 49T R150A-520-49 Silver 50T 1211-0027 Black 50T 1211-0166 Blue 50T 1211-2776 Hard Anodized 50T R150A-520-50 Silver 51T 1211-0028 Black 51T 1211-0167 Blue 51T 1211-2777 Hard Anodized 51T R150A-520-51 Silver 52T 1211-0029 Black 52T 1211-0168 Blue WR200 91-92 13-52 12T R257-520-12 - - - 13T R257-520-13 WR250 91-92, 94-96 14-52 12T R252-520-12 - - - WR250 93 14-51 13T R252-520-13 WR250 97 13-48 14T R252-520-14 YZ250 88-93 14-49 15T R252-520-15 YZ250 94-97 13-49 YZ250 98 14-49 YZ250WR 89 14-49 YZ250WR 90 14-51 YZ250 10-20 14-50 520-114 12T R289-520-12 46T R150A-520-46 Silver YZ250 21-24 - 520-120 13T R289-520-13 47T R150A-520-47 Silver YZ250G 16 - 520-114 14T R289-520-14 48T 1211-0025 Black YZ250X 16-22 - 520-114 14T R289U-520-14 48T 1211-0164 Blue 15T R289-520-15 48T R150A-520-48 Silver 49T 1211-0026 Black 49T 1211-0165 Blue 49T R150A-520-49 Silver 50T 1211-0027 Black 50T 1211-0166 Blue 50T 1211-2776 Hard Anodized 50T R150A-520-50 Silver 51T 1211-0028 Black 51T 1211-0167 Blue 51T 1211-2777 Hard Anodized 51T R150A-520-51 Silver 52T 1211-0029 Black 52T 1211-0168 Blue TT350 86-87 14-50 - - - 49T R131-49 Silver 50T R131-50 Silver 51T R131-51 Silver FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # REAR SIZE PART # OPTIONAL COLOR YAMAHA (CONT) WR450F 11-15 13-50 520-114 12T R289-520-12 46T R150A-520-46 Silver WR450F 16-25 - 520-114 13T R289-520-13 47T R150A-520-47 Silver YZ450F 10-13 13-48 520-114 14T R289-520-14 48T 1211-0025 Black YZ450F 14 13-49 520-114 14T R289U-520-14 48T 1211-0164 Blue YZ450F 15-17 13-48 520-114 15T R289-520-15 48T R150A-520-48 Silver YZ450 18-25 - 520-114 49T 1211-0026 Black YZ450F/60th Anniversary 16 - 520-114 49T 1211-0165 Blue YZ450FX 16-24 - 520-114 49T R150A-520-49 Silver 50T 1211-0027 Black 50T 1211-0166 Blue 50T 1211-2776 Hard Anodized 50T R150A-520-50 Silver 51T 1211-0028 Black 51T 1211-0167 Blue 51T 1211-2777 Hard Anodized 51T R150A-520-51 Silver 52T 1211-0029 Black 52T 1211-0168 Blue YZ490 82 14-44 12T R252-520-12 49T R131-49 Silver YZ490 83-84 14-46 13T R252-520-13 50T R131-50 Silver YZ490 85 14-44 14T R252-520-14 51T R131-51 Silver YZ490 86-90 14-48 15T R252-520-15 WR500 92-93 15-50 12T R252-520-12 49T R131-49 Silver 13T R252-520-13 50T R131-50 Silver 14T R252-520-14 51T R131-51 Silver 15T R252-520-15 TT600 83-86 14-50 - - - 49T R131-49 Hard Anodized 50T R131-50 Hard Anodized 51T R131-51 Hard Anodized
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