BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD PISTON & PISTON KITS PISTON & PISTON KITS 1398 FITS MODEL BORE (MM) X STROKE (MM) DISPL. (CC) BORE SIZE (MM) OVER SIZES (MM) PK KIT PART # PISTON PART # REPL. RING SET PART # REPL. CIRCLIPS PART # REPL. WRIST PIN PART # TOP-END BEARING PART # GASGAS 2-STROKE (CONT) MC 85 21-23 47 85 47 - - 0903-0586 1850CS CW14 S-517 B1012 ArmorGlide skirt coated. x 48.95 EC 125 00-11, MC 125 00-11 54 125 54 STD - 0910-0729 2126CS CW15 - - Racer’s Choice GP Style. x 134 56 2.0 - 0910-0730 2205CS Electra coated. 54.5 Nikasil Bore – Cylinder sleeving or replating required for oversizes. MC 125 21-24 54 124 54 STD - 786M05400 2126CS CW15 S-467 B1013 Nikasil Bore - Cylinder sleeving or replating required for oversizes. x 54 56 2.0 - 786M05600 2205CS Pro-Lite. MC 125 21-24 54 124 54 STD - 0910-2882 2126CD CW15 - B1013 Racer’s Choice GP Style; double ring. x ArmorGlide skirt coated. 54 Electra coated. EC 200 00-14, EC 200R 14-17 62.5 199 62.5 STD - 0910-2879 2461CD CW18 S-477 - x 65 EC 250 97-14 66.4 249 66.4 STD - 0910-0778 2614CD CW18 S-508 B1037 x 72 EC 250 97-14 66.4 249 66.4 STD - 824M06640 0912-0106 CW18 S-508 B1037 x 72 EC 250 21-23 66.4 249 66.4 STD - 0910-0778 2614CD CW18 S-508 B1037 Double ring. x Pro-Lite. 72 EC 250 21-23 66.4 249 66.4 STD - 824M06640 0912-0106 CW18 S-508 B1037 Racer’s Choice 250cc; Single ring. Titanium nitride ring. x 72 ArmorGlide skirt coated. Electra coated. EC 300R 14-18, EC 300 00-14 72 293 72 STD - 0910-1699 2835CD CW18 S-508 - x 72 GASGAS 4-STROKE EC 250F 10-15 77 250 77 STD 0903-0559 0910-0808 - CW16 0913-0008 - 12.5:1 Compression x 263 79 2.0 - - 3110XG Nikasil Bore - Cylinder sleeving or replating required for oversizes. 53.6 EC 250F 10-15 77 250 77 STD 0903-0558 - 0912-0140 CW16 0913-0008 - 13.5:1 Compression x 263 79 2.0 - - 3110XG 2 Ring. Race Only.ArmorGlide skirt coated. 53.6 Nikasil Bore - Cylinder sleeving or replating required for oversizes. EC 250F 21-23 78 250 78 STD - 0910-3166 - - - - 13.8:1 Stock Compression x ArmorGlide skirt coated. 52.3 Strutted forging. EC/EX 250F 24, MC 250F 24-25 81 250 81 - - 0910-6911 - - - - 14.5:1 Compression x - ArmorGlide skirt coated 48.5 - EC/EX 350F 21-24 88 350 88 - - - - CW18 - - 14.2:1 Compression x ArmorGlide skirt coated 57.5 EC 450F 13-15 95 449 95 STD - 0910-0373 - CW18 - - 12.3:1 STD bore; 13.5:1 for +2.00 bore x ArmorGlide skirt coated. 63.4 Nikasil Bore - Cylinder sleeving or replating required for oversizes. EX/MC 450F 21-23 95 449 95 STD - 0910-6542 - - - - 12.75:1 Compression x ArmorGlide skirt coated 63.4 EX/MC 450F 21-23 95 449 95 STD - 0910-6930 - - - - 13.5:1 High Compression x ArmorGlide skirt coated 63.4 EX 450F 24, MC 450F 24-25 95 450 95 STD - 0910-6921 - - - - 13.1:1 Compression x - ArmorGlide skirt coated. 63.4 - EC 500F 24 95 450 95 STD - 0910-6927 - - - - 12.75:1 Compression x - 72 - HIGH-PERFORMANCE PISTONS (CONT)
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