I was just looking aroung the internet this morning when I came across your post from last year about a Rotax 185. I am actually rebuilding the original ultralight that that engine was used for. It called a Lazair and it was a twin engine.
Anyway, I wonder if you still have that engine. I would be interested in buying it from you. I already have 2 engines and what I would really like to buy is the belt drive on your engine. That belt drive allows me to swing a bigger, more efficient prop. I would love to be able to copy yours and make 2 more. Hell, I'll even rent it from you for a week and give it back.
What do you think?