I know I've read a good bit about this topic on several other threads on this forum, so please excuse the new post. I would like some additional clarification. As usual, I am pretty confused about who and what and where the deal is with the manufacturer. In this case I am interested in the"Pitster Pro" XTR 150 engine. I ask because I am looking to buy a number of these motors for a motorcycle to be built here in the States. Pitsters motors are available here in the US and meet (I believe) off-road EPA certification. They say these motors are made by Loncin. According to what I've read either all or part of these bikes/motors are Puzey designs? I'd love to know a bit more about the quality of these motors and how they hold up vs. the SYM Wolf 150, and the Zongshen 125. Are these Loncin motors any good? I'd also love to be able to buy these from the actual inventor/manufacturer if possible (well, I guess not all the way back to Honda).

Thanks
Richard