BOLD MAGENTA part numbers are new for 2023 PARTSCANADA.COM 2023 | OFFROAD ENGINE 588 DISCLAIMER: SEE PAGE 6 FOR IMPORTANT INFORMATION REGARDING CERTAIN WARRANTY AND EMISSION CONTROL REGULATION COMPLIANCE AND NOISE REGULATION INFORMATION. HIGH-PERFORMANCE PISTONS (CONT) FITS MODEL BORE (MM) X STROKE (MM) DISP. (CC) BORE SIZE (MM) OVERSIZES (MM) PK KIT PART # PISTON PART # REPL. RING SET PART # REPL. CIRCLIPS PART # (PR.) REPL. WRIST PIN PART # TOP-END BEARING PART # YAMAHA 4-STROKE (CONT) YZ250F 05-07 WR250F 05-13 12.5:1 Compression. Nikasil Bore 77 250 77.0 STD - 0910-0808 0912-0140 CW16 - - x 53.6 YZ250F 08-11 ArmorGlide Nikasil Bore 77 250 77.0 STD - 0910-1678 - CW16 - - x 53.6 YZ250F 12-13 13.5:1 Stock Compression Nikasil bore 77 250 77.0 STD 0903-1146 - - - - - x 53.6 YZ250F 12-13 14:1 High Compression Nikasil bore 77 250 77.0 STD 0903-1147 - - - - - x 53.6 YZ250F 14-15,YZ250FX 15-16, WR250F 15-17 13.5:1 Compression.ArmorGlide Boxed forging 77 250 77.0 STD 0910-6068 - - CW18 - - x 53.6 YZ250F 16-18,YZ250FX 17-19, WR250F 18-19 13.5:1 Compression.ArmorGlide Boxed forging 77 250 77.0 STD 0910-6072 - - CW18 - - x 53.6 YZ250F 16-18,YZ250FX 17-19, WR250F 18-19 14:1 Compression.ArmorGlide Boxed forging 77 250 77.0 STD 0910-6073 - - CW18 - - x 53.6 YZ450F 06-09 WR450F 07-15 12.5:1 Standard Compression. Nikasil Bore - cylinder sleeving or replating required for oversizes 95 449 95.0 STD - 0910-0373 - CW18 - - x 63 YZ450F 06-09 WR450F 07-15 13.5:1 Hi-Compression. Nikasil Bore - cylinder sleeving or replating required for oversizes 95 449 95.0 STD - 0910-0375 - CW18 - - x 63.4 YZ450F 10-13 12.5:1 Stock Compression Nikasil Bore - ArmorGlide 97 449 97 STD - 0910-2884 - CW18 - - x 60.8 YZ450F 14-17,YZ450FX 16-18, WR450F 16-18 13.5:1 Compression.ArmorGlide. Boxed forging 97 449 97 STD 0910-6069 - - CW18 - - x 60.8 YZ450F 18-19,YZ450FX 19-20 WR450F 19-20 12.8:1 Compression.ArmorGlide. Boxed forging 97 449 97 STD 0910-6083 - - CW18 - - x 60.8 YZ450F 18-19,YZ450FX 19-20 WR450F 19-20 13.5:1 Compression.ArmorGlide. Boxed forging 97 449 97 STD 0910-6084 - - CW18 - - x 60.8 WRIST PIN DIMENSIONS OD/LENGTH PART # 19mm x 45mm x 10mm 0913-0012 OD/LENGTH PART # 15mm x 41mm S-467 OD/LENGTH PART # 18mm x 2.1062” S-508 REPLACEMENT CIRCLIPS DIMENSIONS DESCRIPTION PART # 14mm circlips CW14 15mm circlips CW15 DESCRIPTION PART # 16mm circlips CW16 18mm circlips CW18 DESCRIPTION PART # 19mm circlips CW19 20mm circlips (set of two 2-pk.) CW20 TOP-END BEARING DIMENSIONS DIMENSIONS PART # 12 x 16 x 17.8 0924-0125 16 x 20 x 19.5 978835 15 x 19 x 17 B1001 18 x 22 x 22 B1003 20 x 25 x 27.8 B1004 14 x 18 x 17.5 B1006 DIMENSIONS PART # 16 x 21 x 19.5 B1008 14 x 18 x 16 B1012 15 x 19 x 20 B1013 18 x 23 x 22 B1014 16 x 20 x 19.5 B1016 14 x 18 x 20 B1018 DIMENSIONS PART # 18 x 22 x 23.6 B1022X 22 x 27 x 24.8 B1030 20 x 25 x 23 B1031 18 x 22 x 19.65 B1037 12 x 15 x 14.5 B1041 12 x 15 x 16.3 B1042
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