This is a 72.25 aftermarket top overhaul kit featuring 2 new pistons, moly coated for low friction w/dual rings, pins, circlips , Hard anodized crown is 40% stronger than OEM. full major overhaul gasket w/ crank seals kit as shown. This set exceeds the MFGs specs , Designed to replace the oem elkos in all respects. Smoother running due to better balance, stronger and better heat transfer. These are hard anodized crowned (keeps the heat up top) and feature moly coated skirts to reduce friction and heat. We run em in our trikes and use them in our shop for the past 10+ years This is set is for 72.25 mm 1st oversize bore 503 rotax.
Engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls
All pistons, rings, pins and circlips are manufactured to OEM specifications
All individual components are interchangeable with original parts
Piston weight compatible with original piston
NOTE. Most international orders will require additional shipping cost, We will supply a quote for your order via email,
Rotax 503 piston and gasket kit for ultralight aircraft engines top end set 72.25 mm moly coated
