This is a top overhaul kit featuring 1 new aftermarket  piston  kit and gasket set as shown. This set exceeds the MFGs specs , Designed to replace the oem elkos in all respects.

These are becomming hard to get, get while they last

 Smoother running due to better balance, stonger and better heat transfer. The std & .020 bore pistons are hard anodized crowned  and feature moly coated skirts for reduced friction and heat. The .010 pistons are not moly coated

We run em in our trikes and use them in our shop for the past 9+ years

This is set is for  std bore 277  rotax 72.00 MM bore

Oversizes available in .25mm (.010) .5mm (.020) just specify in the check out box