I can't help you in this type of application, but...
I use a lot of Nippon rings in MX related builds and have found them to be of excellent quality in comparison to some others I've used for those types of builds.....55-75hp @ up to 14k rpm 4 stroke and 30-60hp @ up to 10.5krpm 2 stroke
They are generally about 2.0mm and low tension in those applications, but I've never had a quality or blow-by scenario that I could blame on thise rings.

Last edited by usp4u; 11/23/22 02:19 AM.