BOLD MAGENTA part numbers are new for 2023 PARTSCANADA.COM 2023 | OFFROAD ENGINE 578 DISCLAIMER: SEE PAGE 6 FOR IMPORTANT INFORMATION REGARDING CERTAIN WARRANTY AND EMISSION CONTROL REGULATION COMPLIANCE AND NOISE REGULATION INFORMATION. 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 # GAS GAS 2-STROKE MC50 21-22 Pro-Lite 39.5 50 39.5 0910-6071 - - - - - X 40 MC85 21-22 ArmorGlide 47 85 47.00 - - 0903-0586 - CW14 - B1012 x 48.95 MC125 21-22 *Nikasil Bore - Cylinder sleeving or replating required for oversizes 54 124 54.0 STD - 786M05400 - CW15 - B1013 x 54 EC 250 21-22 Pro-Lite Single Ring 66.4 249 66.4 STD - 824M06640 - CW18 - B1037 x 72 EC 250 21-22 Pro-Lite Double Ring 66.4 249 66.40 STD - 0910-0778 - CW18 S-508 B1037 x 72 GAS GAS 4-STROKE MC250F 21-22 EX250F 21-22 14.4:1 Compression ArmorGlide. Strutted forging 78 250 78.0 STD 0910-6074 - 0912-0120 - - - x 52.30 EC 350 F 21, EX 350 F 21-22 14.2:1 Stock Compression ArmorGlide 88 350 88 STD - 0910-2893 - - - - x 57.5 HONDA 2-STROKE CR80R 86-91 Pro-Lite *Nikasil Bore - Cylinder sleeving or replating required for oversizes 47 82.9 47.0 STD - - - CW14 - B1012 x 47.8 CR80R 86-02 GP style - Electra Coated 47 82.9 47.0 STD - - - CW14 - B1012 x 90.1 49.0 2.0 47.8 CR85R 03-07 Pro-Lite Nikasil Bore 47.5 84.7 47.5 STD - 833M04750 - CW14 - B1012 x 47.8 CR125M 73-78 MT125 73-78 56 123 56.0 STD - - - CW14 - B1018 x 50 CR125R 79 *Chrome Bore Cylinder sleeving or replating required for oversizes 56 123 56.5 0.5 - - - CW14 - B1018 x 50 CR125R 80-84 55.5 120 55.5 STD - - - CW14 - B1018 x 50 CR125R 85-86 54 x 54 124 54.0 STD - - - CW14 - B1006 CR125R 87 Pro-Lite *Power Valve must be modified for .040 and longer 54 124 54.0 STD - - 2126CS CW14 - B1018 x 56.0 2.0 - - 2205CS 54 HIGH-PERFORMANCE PISTONS (CONT) WRIST PINS • Wiseco wrist pins are strong, lightweight and can be used with OEM pistons, too • Wiseco 2-stroke pistons include a wrist pin, unless indicated CIRCLIPS • Two high-strength, easy-to-install circlips are furnished with every piston • Order additional inventory from the chart below • Sold in 2-pack unless noted TOP END BEARINGS • High-quality bearings are manufactured to the highest standards; case-hardened for maximum life and smooth operation at high engine speeds
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