The story that I heard was this: (not sure how accurate it is but I did hear it from 3 different people so it might be).
Honda went to China to see about having the companies there make their engines to save a lot of money but only if the quality was there. They gave 3 companies the blueprints, instructions, etc... to get started.
Honda went back a while later that year and checked on the progress. Nothing would last an hour so they told them it was not acceptable and would come back. They came back but the engines would not last 100 hours so they left again. After a 3rd or 4th trip back they gave up and wanted the plans back and started thinking of another plan.
While the china plants had the plans, employees copied the blueprints and sold them to their friends, competitors and out of town companies.
Later on Honda found out about this and started the legal work to shut them down and sue the companies making the engines, kind of hard to do.
Now there are over 300 companies in china making the Honda clones and some are almost to the Honda quality.
Briggs&Stratton moved over there to make the stuff cheaper, that story was on Discovery channel about moving jobs overseas, they also showed a furniture company that moved most of it's operations there also.
From what I hear is that out of many, many brands out there some are good and from what you pay for them and how long you get out of them, it is not a bad deal.
The Honda parts and clone parts are mostly interchangeable but some parts wear out very fast or are substandard like the pull cord assembly, muffler and bolts, head bolt areas, and carburetor bolt areas, some of the guys I talked to just drill them out larger and tap them for larger bolts and they hold up ok.
I have a good friend that has had 8 or 10 of the Carrollstream engines and switched to the dealer on ebay, said that his subs switched because of their friends switching because of better pricing and better customer service and he is happier with that brand of clone.
I got one of those Carrollstream engines but they did not pack it good at all, it got here dented and I had to wait 2.5 or 3 months for replacement parts because of container delays from china or whatever B.S. they felt like saying at the time.
I will not buy from them again, too much B.S. to deal with.
I have heard of some of the other clone brands out there but I do not know of anyone that is using them or how well they hold up.
Remember as always.....You get what you pay for and sometimes pay for what you get. hahahahahahaha