BOLD MAGENTA part numbers are new for 2023 ENGINE PARTSCANADA .COM OFFROAD | 2023 587 DISCLAIMER: SEE PAGE 6 FOR IMPORTANT INFORMATION REGARDING CERTAIN WARRANTY AND EMISSION CONTROL REGULATION COMPLIANCE AND NOISE REGULATION INFORMATION. HIGH-PERFORMANCE PISTONS continued on next page. HIGH-PERFORMANCE PISTONS (CONT) 1 For IT250 81-82,YZ250 80-81. 2 For YZ250 82. 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 2-STROKE (CONT) YZ85 02-22 Pro-Lite *Ceramic Composite 47.5 85 47.5 STD - 805M04750 - CW14 - B1012 x 47.8 YZ85 02-22 Racer’s Choice Supermini *Ceramic Composite 52.5 103.5 52.5 5.5 - 0910-0366 - CW14 - B1012 x 47.8 YZ125 84-93 56 128 57.0 1.0 - - - CW16 - B1016 x 50 YZ125 94-96 Pro-Lite *Ceramic Composite - Cylinder sleeving or replating required for oversizes 54 124 54.0 STD - 647M05400 - CW16 - B1016 x 54.5 YZ125 97 Pro-Lite *Ceramic Composite - Cylinder sleeving or replating required for oversizes 54 124 54.0 STD - - - CW15 S-467 - x 54.5 YZ125 98-01 Pro-Lite *Ceramic Composite - Cylinder sleeving or replating required for oversizes 54 124 54.0 STD - 726M05400 - CW15 S-467 - x 54.5 0.5 - 726M05450 - 54.5 YZ125 01 Pro-Lite *Ceramic Composite - Cylinder sleeving or replating required for oversizes 54 124 54.0 STD - 726M05400 - CW15 S-467 B1001 x 54.5 0.5 - 726M05450 - 54.5 YZ125 02-04 Pro-Lite 54 125 54.0 STD - 797M05400 - CW15 S-467 B1001 x 54.5 YZ125 05-21,YZ125X 2022 Racer’s Choice GP Style Electra Coated *Crankcase clearance required for 57mm and larger bore diameter* 54 125 54.0 STD - 0910-0799 - CW15 - B1001 x 144 58.0 4.0 - 0910-1255 - 54.5 YZ250 80-82 IT250 81-82 70 246 71.0 1.0 - 452M07100 - CW18 - B10031 x 72.0 2.0 - - 2835CD B10142 64 YZ250 83-87 Pro-Lite 68 246.8 68.0 STD - - - CW18 - B1014 x 68 YZ250 88-91 WR250 88-91 Pro-Lite 68 246.8 68.0 STD - - - CW18 S-508 B1014 x 68 YZ250 92-98 WR250 92-98 *Ceramic Composite. Pro-Lite 68 246.8 68.0 STD - 677M06800 - CW18 S-508 B1014 x 68 YZ250 02-22,YZ250X 16-22 Pro-Lite *Cylinder sleeving or replating required for oversizes 66.4 249 66.4 STD - 804M06640 - CW18 S-508 B1003 x 68.5 2.10 - 0910-0207 - 72 YZ250 02-22,YZ250X 16-22 250cc Racer’s Choice Single Ring Electra Coated 66.4 249.3 66.4 STD - 0910-0367 - CW18 S-508 B1003 x 72 YZ490 82-83 IT490 83-84 87 487 87.5 0.5 - - - CW18 - B1014 x 82 YZ490 84-90 WR500 91-93 87 487 88.5 1.5 - - - CW18 - B1014 x 82 YAMAHA 4-STROKE TT-R125/L 00-21 (all) 11:1 Compression 54 128 55.0 1.0 - 4752M05500 - CW15 - - x 54 TTR250 99-06 10.5:1 Compression 73 249 73.0 STD - - - CW18 - - x 59.6
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