BOLD MAGENTA part numbers are new for 2024 PISTON & PISTON KITS PARTS-UNLIMITED.COM OFFROAD | 2024 1375 FITS MODEL DIAMETER (MM) PISTON VERSION PISTON PART # RING SET PART # WRIST PIN PART # CIRCLIP PART # COBRA CX50 JR/SR 06-17 38.94 Cast Replica 0910-4134 - - - 38.95 Cast Replica 0910-4135 - - - 38.96 Cast Replica 0910-4136 - - - CX 65 07-09, 12-16 44.45 Cast Replica 0910-4137 - - - GASGAS MC50 21 39.47 Cast Replica 0910-2065 0912-0346 0913-0103 0913-0058 MC65 21 44.97 Cast Replica 0910-1835 0912-0165 - 0913-0048 MC85 21 46.94 Cast Replica 0910-5163 0912-0163 0913-0027 0913-0048 46.95 Cast Replica 0910-5164 0912-0163 0913-0027 0913-0048 46.96 Cast Replica 0910-5165 0912-0163 0913-0027 0913-0048 MC125 21 53.94 Cast Replica 0910-5155 - 0913-0019 0913-0054 53.95 Cast Replica 0910-5156 - 0913-0019 0913-0054 53.96 Cast Replica 0910-5157 - 0913-0019 0913-0054 MC125 21 53.94 Cast Race 0910-5159 - 0913-0019 0913-0054 53.95 Cast Race 0910-5160 - 0913-0019 0913-0054 53.96 Cast Race 0910-5161 - 0913-0019 0913-0054 EC250 02-07 66.34 Cast Replica 0910-2553 0912-0175 0913-0038 0913-0056 EC250 21 66.34 Cast Replica 0910-2066 0912-0347 0913-0038 0913-0047 66.35 Cast Replica 0910-2067 0912-0347 0913-0038 0913-0047 EC250F 21 77.96 Forged Replica 0910-5140 - - - 77.97 Forged Replica 0910-5141 - - - MC250F 21 77.96 Forged Replica 0910-4076 - - - 77.97 Forged Replica 0910-4077 - - - MC250F 21 (+2mm big Bore) 80.96 Forged Big Bore 0910-5186 0912-0309 - - 80.97 Forged Big Bore 0910-5187 0912-0309 - - 80.98 Forged Big Bore 0910-5188 0912-0309 - - EC300 02-19 71.95 Cast Replica 0910-3186 0912-0177 0913-0038 0913-0056 PISTON KITS, RINGS,WRIST PINS AND CIRCLIPS • 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 • Big Bore pistons increase engine’s displacement, torque, and peak horsepower •Forged Replica pistons are forged OE replacements •Replica pistons and all rings are OEM replacements • Piston kits include piston, rings, wrist pin and circlips •Replacement 2-stroke piston rings sold individually; 4-stroke piston rings sold as a set PISTON KITS, RINGS,WRIST PINS AND CIRCLIPS continued on next page. PISTON VERSIONS Cast Replica – Cast OE replacement piston Cast Race – Unique cast GP-style race piston with only one compression ring Cast Big Bore – Big bore stock compression cast piston Forged Replica – Forged OE stock compression piston Forged Big Bore – Forged OE stock compression big bore piston Forged Race – Unique forged GP-style race piston with only one compression ring Forged High Comp – Forged high-compression pistons 0910-5178 0910-4658 0910-4669
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