BOLD MAGENTA part numbers are new for 2025 SPROCKETS PARTSCANADA .COM OFFROAD | 2025 SPROCKETS 427 FRONT SPROCKET KEY: GR = GROOVED ST = STANDARD UL = ULTRALIGHT ULG = ULTRALIGHT GROOVED 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 13 GR 1212-0991 46 R150A-520-46 Silver WR250F 17-19, 23 - 520-114 14 GR 1212-0992 47 R150A-520-47 Silver WR250F 20-24 - 520-116 48 1211-0025 Black YZ250F 10-11 13-49 520-114 48 1211-0164 Blue YZ250F 12-18 13-50 520-114 48 R150A-520-48 Silver YZ250F 19-25 - 520-114 49 1211-0026 Black YZ250F 60th Anniversary 16 - 520-114 49 1211-0165 Blue YZ250FX 15-22 - 520-114 49 R150A-520-49 Silver 50 1211-0027 Black 50 1211-0166 Blue 50 R150A-520-50 Silver 51 1211-0028 Black 51 1211-0167 Blue 52 1211-0029 Black 52 1211-0168 Blue 52 R150A-520-52 Silver 53 R150A-520-53 Silver WR200 91-92 13-52 - 12 GR R257-520-12 - - - 13 GR R257-520-13 YZ250 10-20 14-50 520-114 12 GR R289-520-12 46 R150A-520-46 Silver YZ250 21-24 - 520-120 13 GR R289-520-13 47 R150A-520-47 Silver YZ250G 16 - 520-114 14 GR R289-520-14 48 1211-0025 Black YZ250X 16-22 - 520-114 14 ULG R289U-520-14 48 1211-0164 Blue 15 GR R289-520-15 48 R150A-520-48 Silver 49 1211-0026 Black 49 1211-0165 Blue 49 R150A-520-49 Silver 50 1211-0027 Black 50 1211-0166 Blue 50 R150A-520-50 Silver 51 1211-0028 Black 51 1211-0167 Blue 52 1211-0029 Black 52 1211-0168 Blue 52 R150A-520-52 Silver 53 R150A-520-53 Silver TT350 86-87 14-50 - - - 50 R131-50 Silver WR450F 11-15 13-50 520-114 12 GR R289-520-12 46 R150A-520-46 Silver WR450F 16-25 - 520-114 13 GR R289-520-13 47 R150A-520-47 Silver YZ450F 10-13 13-48 520-114 14 GR R289-520-14 48 1211-0025 Black YZ450F 14 13-49 520-114 14 ULG R289U-520-14 48 1211-0164 Blue YZ450F 15-17 13-48 520-114 15 GR R289-520-15 48 R150A-520-48 Silver YZ450 18-25 - 520-114 49 1211-0026 Black YZ450F/60th Anniversary 16 - 520-114 49 1211-0165 Blue YZ450FX 16-24 - 520-114 49 R150A-520-49 Silver 50 1211-0027 Black 50 1211-0166 Blue 50 R150A-520-50 Silver 51 1211-0028 Black 51 1211-0167 Blue 52 1211-0029 Black 52 1211-0168 Blue 52 R150A-520-52 Silver 53 R150A-520-53 Silver YZ490 82 14-44 - - - 53 R131-50 Silver YZ490 83-84 14-46 - YZ490 85 14-44 - YZ490 86-90 14-48 - WR500 92-93 15-50 - - - 50 R131-50 Silver TT600 83-86 14-50 - - - 50 R131-50 Hard Anodized
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