Although this one was cleaner than the Ace 90 when I started, it gave me more trouble. A bad air leak resulted in a fried stator and a spun counter shaft bushing. I got lucky. Replaced the bushing, (it was still a snug fit so it didn't damage the boss), and the cylinder and head were re-decked. Machinist says he removed about .008" total from the head and cylinder decks. Most of it came off the head. Re-assembled and re-sealed; as soon as I fired it up it was immediately obvious that I got it right the second time. Runs fantastic!
The only other major modification is that I'm using a 6v 35/35w halogen semi-sealed beam that I've talked about before. Very simple mod to the trim ring to make it work. It's function is very satisfactory.
Looking forward to the Poker Run and Bad Rock..
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Roger