Which Motor, Dealer?

I have purchased a new bike and have completely disassembled it for paint, precision tuning and choice part fitment all with a motor in mind. I have not yet purchased a motor and I'm having trouble sifting through the vast array of dealer claims. All of these motors have the same cases as far as I can tell from pics. Some claim to have Japenese bearings, small end roller bearings or needle bearings. I would think that they all have roller bearings @ the big end and the premiums have needle bearings @ the small end instead of a bronze bushing. What are the other differences? Some claim EPA compliance others don't. Is this important? Why? Above 49cc, actual displacement seems ambiguous. They range in price from $49.95 (the cheapest and self professed non premium), and "premium motors" range from $150-$350. I am willing to pay more for quality but it seems I'm not getting all the info I need to be able to make an educated decision. From the info on the websites that I've seen the $150 motor is the same as the $350 one. I know that these are inexpensive chinese motors and even the most expensive one is reletively inexpensive but who wants to pay $350 when they can spend $150 for the same thing. Please Help! Dealers Welcome! P.S. I'm aware that in text it can be easy to insult without intending to do so. I don't want to insult anyone, I just wish to have all the same info I would if I were buying a Honda, a Ford a BMW etc, etc. Thanks!

i would suggest you get the one tha t has the arrow pointing forward ( from the drivers side)

Welcome to the forum.

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If it ain't broke, and you mess with it long enough, it will be.

Thanks, That's helpful. I know it's not a "huge" decision but lots of times when I start something new I hear "you should have gone to ....... to get one" after I've already gotten it. It's an "I told you so" in disguise. I found your other thread on the subject and found it helpful as well.

Got mine from Kings Motorized bikes (just engine kit), runs great, started right up and i mean right up, surprised me cause i wasnt expecting it to start that quick and almost lost it and crashed! lol, but as far as bearings i would think you would have to get them yourself and replace them all, just dont trust what the companies claim especially when they come from a PLACE THAT POISONS BABY FORMULA JUST TO SAVE MONEY!

Thanks! I'm going to buy the cheap one and see if I can rebuild it w/ some descent bearings, a cylinder hone a piston and rings (maybe wiseco or pro-x have something). It'll be fun. I'm also going to buy a premium one to install and get going.