Re: Caveat emptor. Let The Buyer Beware.
You've come the the right forum, friend!
You'll get some good help here from members, including members who've gone into the biz of making and supplying bikes and parts.
I've done bi'ness with two of those companies mentioned, and I concur. Real people, good service, satisfaction with the products bought.
Now that I'm thinking of it, and while I'm on line, I think I'll go visit a couple those companies and buy the carb/air breather and muffler I've been longing after.