BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD PISTON & PISTON KITS PISTON & PISTON KITS 1456 FITS MODEL DIAMETER (MM) PISTON VERSION PISTON PART # RING SET PART # WRIST PIN PART # CIRCLIP PART # YAMAHA (CONT) YZ125 05-21 (+4 mm Big Bore) 57.95 Forged Race 0910-0967 0912-0173 - 0913-0054 57.96 Forged Race 0910-2117 0912-0173 - 0913-0054 YZ125X 20-21 53.94 Cast Replica 0910-0966 0912-0170 0913-0019 0913-0054 YZ125X 20-21 (+1 mm Big Bore) 54.95 Cast Big Bore 0910-3343 - 0913-0019 0913-0049 55.95 Cast Big Bore 0910-3344 0912-0366 0913-0019 0913-0049 YZ125X 20-21 (+4 mm Big Bore) 57.95 Forged Race 0910-0967 0912-0173 - 0913-0054 57.96 Forged Race 0910-2117 0912-0173 - 0913-0054 WR250 91-95/YZ250 90-95 67.95 Cast Replica 0910-0968 - - 0913-0056 WR250/YZ250 96-97 67.94 Cast Replica 0910-2541 - - 0913-0056 67.95 Cast Replica - - - 0913-0056 YZ250/X 99-22 66.34 Cast Replica 0910-2542 0912-0175 0913-0038 0913-0056 66.35 Cast Replica 0910-0970 0912-0175 0913-0038 0913-0056 WR250F/YZ250F 01-04 (compression 12.7:1) 76.94 Forged Replica - 0912-0226 - 0913-0049 76.95 Forged Replica 0910-0971 0912-0226 - 0913-0049 76.96 Forged Replica - 0912-0226 - 0913-0049 76.97 Forged Replica - 0912-0226 - 0913-0049 WR250F 01-13/YZ250F 01-07 (high compression 13.5:1) 76.94 Forged High Comp - 0912-02262 - 0913-0049 76.96 Forged High Comp - 0912-02262 - 0913-0049 76.98 Forged High Comp - 0912-02262 - 0913-0049 WR250F 05-13/YZ250F 05-07 (compression 12.5:1) 76.94 Forged Replica - 0912-0226 - 0913-0049 76.95 Forged Replica - 0912-0226 - 0913-0049 76.96 Forged Replica - 0912-0226 - 0913-0049 76.97 Forged Replica - 0912-0226 - 0913-0049 WR250F 05-13/YZ250F 05-07 (+3 mm Big Bore) 79.96 Forged Big Bore - 0912-0308 - - 79.97 Forged Big Bore - 0912-0308 - - 79.98 Forged Big Bore - 0912-0308 - - YZ250F 08-13 (compression 13.5:1) 76.95 Forged Replica - 0912-0226 - 0913-0049 76.96 Forged Replica - 0912-0226 - 0913-0049 76.97 Forged Replica - 0912-0226 - 0913-0049 76.98 Forged Replica - 0912-0226 - 0913-0049 YZ250F 14-15 76.95 Forged Replica 0910-3345 - - - 76.96 Forged Replica 0910-3346 - - - YZ250F 14-15 (high compression 14.2:1) 76.97 Forged High Comp 0910-3350 - - - 76.95 Forged High Comp - 0912-0634 - - 76.96 Forged High Comp - 0912-0634 - - 76.97 Forged High Comp - 0912-0634 - - WR250F 18/YZ250F 14-18/YZ250FX 15-18 (Big Bore) 79.96 Forged Big Bore 0910-3354 0912-0308 - - 79.97 Forged Big Bore 0910-3355 0912-0308 - - YZ250F 16-18 79.95 Pro High Comp 0910-5189 - - - WR400F 98-00/YZ400F 98-99 91.93 Forged Replica 0910-1902 - - - WR426F 01-02/YZ426F 00-02 94.93 Forged Replica - - - 0913-0060 WR450F 03-14/YZ450F 03-09 (compression 12.5:1) 94.93 Forged Replica - 0912-0238 - 0913-0056 94.94 Forged Replica - 0912-0238 - 0913-0056 94.95 Forged Replica - 0912-0238 - 0913-0056 94.96 Forged Replica - 0912-0238 - 0913-0056 WR450F 03-14/YZ450F 03-09 (high compression 13.5:1) 94.94 Forged High Comp 0910-2120 0912-0217 - 0913-0056 94.95 Forged High Comp - 0912-0217 - 0913-0056 94.96 Forged High Comp - 0912-0217 - 0913-0056 WR450F 03-14/YZ450F 03-09 (+3 mm Big Bore) 97.96 Forged Big Bore 0910-19631 0912-0313 - 0913-0056 97.97 Forged Big Bore - 0912-0313 - 0913-0056 97.98 Forged Big Bore - 0912-0313 - 0913-0056 WR450F 03-14/YZ450F 03-09 (+5 mm Big Bore) 99.96 Forged Big Bore - 0912-0297 - 0913-0056 YZ450F 10-13 96.93 Forged Replica - 0912-0352 - 0913-0056 96.94 Forged Replica - 0912-0352 - 0913-0056 96.95 Forged Replica - 0912-0352 - 0913-0056 96.96 Forged Replica - 0912-0352 - 0913-0056 YZ450F 10-15 (+2 mm Big Bore) 98.94 Forged Big Bore - - - 0913-0056 YZ450F 14-16,WR450F 16-18 96.93 Forged Replica 0910-3396 - - 0913-0056 96.94 Forged Replica 0910-3397 - - 0913-0056 YZ450F 18-19,WR450F 19-20 96.95 Forged Replica 0910-5191 - - - 96.96 Forged Replica 0910-5192 - - - YZ450FX 19-20 96.95 Forged Replica 0910-5191 - - - 96.96 Forged Replica 0910-5192 - - - 1 Replacement Cylinder Works Big Bore pistons. 2 Require three rings per piston. PISTON KITS, RINGS,WRIST PINS AND CIRCLIPS (CONT)
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