I read through this thread from 2015. Most of the opinions are exactly opposite of my experience. As I have noted earlier, Stan Keyes and I both run Maney cylinders with alum liners that have a Nikasil coating. We did this because when running the same cylinders with the cast iron liners we could never get more than half of a race season before loosing compression and power due to ring wear. Millennium Technologies did the coating. They also used torque plates we provided to do the finish honing of the bores. I am entering my 4th year of using this cylinder on my Seeley Commando race bike. All we have done to freshen the motor is put in new rings. This year we did not even do that ( only raced half the season last year) Over the winter we did normal compression and leak down tests and did not take the head off. This is a 750 motor, with billet cases, Rob Hall ported Full Auto head, aforementioned modified Maney cylinders, JS Motorsport Cams, TT 5 speed, ect, that produces 65 HP on the dyno. It has run for 4 years with only change of the rings twice. Stan Keyes can confirm this
There are many "experts" on this site, many of which I respect, but it is very difficult to balance their opinion against my experience. So, I will let the Access Norton community know what we are working on, when finished and tested, it will be your option on whether you want to buy the product or not.