This is a aftermarket Rotax 503 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 mm std bore 503 Rotax.
International orders will require that u pay via the paypal option and and additional express mail shipping charge of $68.00 that we will invoice you for separately after your purchase.
Rotax 503 piston and gasket kit for ultralight aircraft engines top end set 72 mm moly coated