Fits Honda CRF250R 04-12 Four stroke pistons must withstand much higher cylinder pressures compared to 2 stroke pistons. This is why Vertex 4 stroke pistons are forged from the highest quality 2618 aluminum alloy. The wrist pins are either case hardened or Nitride coated ensuring the hardest wear resistance possible. All pistons have a Molybdenum coating on the skirt to reduce wear and aid run in. Vertex pistons are original equipment for many European manufactures inc KTM. The pistons are super strong and suitable for all levels of racing or roosting with you mates. The piston kits includes piston, pin, clips and piston rings.
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