I've got them on my America. Have just rejetted the carbs and have only started it up and ran it for a few minutes. It's not back on the road yet though. It should be soon, I'll let you know how they work. I'm not positive, but I think the id for the filter was 42mm. I used a calper and converted inches to mm. I'll get the number for the filters when I get home. They are the type you have to oil.
