Re: Looking for cheapest reliable motor.
2door/Tom and wayne z just gave you the best advice you could hope to get for the questions you ask, I agree 100% with each of them.
In my opinion, " Brand " doesn't mean squat on these china girls, one of my engines was the cheapest thing BGF on ebay was selling at the time winter 2009, it has given me the least trouble and has more miles on it than my other engines, easiest starting of the three and just runs good all the time everytime.
As it has been said already, any & all of these engines / kits are a gamble, but most of them, if put together right will work out just fine, many of the problems that are had on these kits are do to people lacking the tools and/or the ability to make them like they should be.
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!