BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD PISTON & PISTON KITS PISTON & PISTON KITS 1388 FITS MODEL COMPRESSION RATIO CYLINDER BORE (MM) PISTON DIAMETER (MM) DISPL (MM) PISTON VERSION TOP-END KIT PART # GASGAS MC50 21 STD 39.50 39.47 50 Cast Replica 0910-3116 HONDA CR80R 92-02 STD 47.00 46.95 80 Cast Replica 0910-3360 CR85R 03-04 STD 47.50 47.45 85 Cast Replica 0910-3028 CR85R 05-07 STD 47.50 47.45 85 Cast Replica 0910-3027 CR85RB 03-04 STD 47.50 47.45 85 Cast Replica 0910-3028 CR85RB 05-07 STD 47.50 47.45 85 Cast Replica 0910-3027 CR125R 92-97 STD 54.00 53.94 125 Cast Replica 0910-3357 CR125R 98-99 STD 54.00 53.94 125 Cast Replica 0910-3358 CR125R 00-02 STD 54.00 53.94 125 Cast Replica 0910-3019 CR125R 03 STD 54.00 53.94 125 Cast Replica 0910-3018 CR125R 04 STD 54.00 53.93 125 Cast Replica 0910-3020 CR125R 05-07 STD 54.00 53.94 125 Cast Replica 0910-3021 CR250R 97-01 STD 66.40 66.35 250 Cast Replica 0910-3022 CR250R 02-04 STD 66.40 66.35 250 Cast Replica 0910-3023 CR250R 05-07 STD 66.40 66.35 250 Cast Replica 0910-3024 CRF250R 04-07 12.9:1 78.00 77.95 250 Forged Replica 0910-3724 12.9:1 78.00 77.96 250 Forged Replica 0910-3725 13.4:1 78.00 77.95 250 Forged High Comp 0910-3736 13.4:1 78.00 77.96 250 Forged High Comp 0910-3737 13.4:1 78.00 77.97 250 Forged High Comp 0910-3738 CRF250R 08-09 13:1 78.00 77.95 250 Forged Replica 0910-3760 13:1 78.00 77.96 250 Forged Replica 0910-3761 CRF250R 10-13 13.2:1 76.80 76.76 250 Forged Replica 0910-3769 13.2:1 76.80 76.77 250 Forged Replica 0910-3770 14.1:1 76.80 76.76 250 Forged High Comp 0910-3775 CRF250X 04-16 13.4:1 78.00 77.97 250 Forged High Comp 0910-3724 12.9:1 78.00 77.96 250 Forged Replica 0910-3725 13.4:1 78.00 77.95 250 Forged High Comp 0910-3736 13.4:1 78.00 77.96 250 Forged High Comp 0910-3737 13.4:1 78.00 77.97 250 Forged High Comp 0910-3738 TOP-END PISTON KITS • All pistons are heat-treated with a T-5 hardening and tempering cycle •All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life •Cast piston kits are gravity-cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston •Forged pistons are forged from 2618 aluminum for superior strength and durability •Forged High Compression pistons improve power and torque across entire rpm range •Forged Replica pistons are forged OEM replacements •Replica pistons and all rings are OEM replacements • Top-end piston kit includes piston, rings, pins, circlips, top-end gaskets, wrist pin bearing when applicable and cam chain when applicable 4-Stroke PISTON VERSIONS Cast Replica – Cast OE replacement piston Forged Replica – Forged OE stock compression piston Forged High Comp – Forged high-compression pistons
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