This is a aftermarket top overhaul kit featuring 2 new teflon moly coated pistons, oem style w/dual rings, pins, circlips , 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, stonger and better heat transfer. 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 bore 503 rotax. .25mm oversize .010". This kit is a spacial order takes us up to 7 days to get these special oversize pistons.
International orders will require that u pay via the paypal option and and additional express mail shipping charge of $78.00 that we will invoice you for separately after your purchase.