Vertex Piston Top End Kits

All pistons are heat treated with a T-5 or T-6 hardening and tempering cycle. All piston skirts are coated with a high-tech Molybdenum Disulphide coating for faster break-in time and increased piston life.


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  • 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 engines displacement, torque, and peak horsepower.
  • Forged Replica pistons are forged O.E.M. replacements.
  • Replica pistons and all rings are O.E.M. replacements.
  • Top end piston kit includes piston, rings, pins, circlips, top end gaskets, and wrist pin bearing when applicable.
  • Replacement two-stroke piston rings sold individually; four-stroke piston rings sold as a set.
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