BOLD MAGENTA part numbers are new for 2025 PISTON & PISTON KITS PARTS-UNLIMITED.COM ATV/UTV | 2025 PISTON & PISTON KITS 1081 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 • Kits include piston, rings, wrist pin and circlips •Replacement two-stroke piston rings sold individually; four-stroke piston rings sold as a set NOTE: Top End Kits include Piston Kit and a Top End Gasket Kit, top-end bearing and cam chain. PISTON VERSIONS Cast Replica – Cast OE replacement piston 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 High Comp – Forged high compression pistons FITS MODEL DIAMETER (MM) PISTON VERSION PISTON KIT PART # TOP END KIT PART # RING PART # WRIST PIN PART # CIRCLIPS PART # ARCTIC CAT DVX400 04-07 89.96 Forged Replica 0910-0978 - 0912-0236 - - 89.97 Forged Replica - 0910-3839 0912-0236 - - 89.98 Forged Replica - - 0912-0236 - - DVX400 04-07 (407cc Big Bore) 90.96 Forged Big Bore - - - - 0913-0057 DVX400 04-07 (Big Bore) 93.95 Forged Big Bore - - 0912-0237 - 0913-0057 93.96 Forged Big Bore - - 0912-0237 - 0913-0057 93.97 Forged Big Bore - - 0912-0237 - 0913-0057 93.98 Forged Big Bore - - 0912-0237 - 0913-0057 DVX400 04-07 (compression 13.5:1) 89.96 Forged High Comp - - 0912-0236 - 0913-0057 89.97 Forged High Comp - - 0912-0236 - 0913-0057 89.98 Forged High Comp - - 0912-0236 - 0913-0057 HONDA TRX400EX 99-08 84.95 (STD) Cast Replica 0910-1065 - - - 0913-0057 TRX400EX/X 99-14 84.97 Cast Replica 0910-1065 - - - 0913-0057 85.47 Cast Replica 0910-1066 - - - 0913-0057 85.97 Cast Replica 0910-1067 - - - 0913-0057 86.95 Cast Big Bore 0910-1068 - - - 0913-0057 87.95 Cast Big Bore - - - - 0913-0057 88.95 Cast Big Bore - - - - 0913-0057 TRX400EX 99-08 88.94 Cast Stroker 0910-26364 - 0912-0390 - - TRX450R 04-05 (compression 10.5:1) 93.97 Cast Replica - - 0912-0237 - - 93.98 Cast Replica - - 0912-0237 - - 93.99 Cast Replica - - 0912-0237 - - TRX450R 04-05 (compression 11.5:1) 93.95 Forged High Comp - - 0912-0237 - - 93.96 Forged High Comp - - 0912-0237 - - 93.97 Forged High Comp - - 0912-0237 - - TRX450R 04-05 (compression 13.1:1) 93.95 Forged High Comp - - 0912-0237 - - 93.96 Forged High Comp - - 0912-0237 - - 93.97 Forged High Comp - - 0912-0237 - - TRX450R 04-05 (479cc Big Bore; compression 10.5:1) 96.96 Cast Big Bore - - 0912-0324 0913-0097 - 96.97 Cast Big Bore 0910-19671 - 0912-0324 0913-0097 - 96.98 Cast Big Bore - - 0912-0324 0913-0097 - 96.99 Cast Big Bore - - 0912-0324 0913-0097 - PISTON KITS, RINGS,WRIST PINS AND CIRCLIPS continued on next page. 0910-0978 1 Replacement Cylinder Works Big Bore pistons. 4 For use with Hot Rods stroker crankshaft #4240 (Parts Unlimited PART #0921-0086).
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