I have to comment on this topic. I recently purchased a motor from gasbike.net and I would not recommend it. The cheapo I got off ebay is much better than the one I received from gasbike. The silver slant 66cc is a POS! Just sayin.
From now on it's Skyhawk and I would definitely try one of the PK8O's from Ozark Cruisers. Consistent quality seems to be the issue with these no name engines. I want to know that what I buy will be of higher quality and will last.