I bought a 150 street bike tierra it looks like the sport bike Ninja's you know the type they call rice burners. Anyway, I also had problems Like getting it titled (though after a week or so it was titled by the michigan secretary of state.) they didn't know what it was, go figure. I also had problems with bolt and bnuts falling off. I wanted to return the thing. I then talked some friends who have harley davidson's so they looked at it they said " It's a four stroke!! " yea it going to come apart. So I'm looking at it like, oh okay. To make a long story short you have to maintain you bikes, people they're like a pet you have to do more than feed it and let it out. ( put gas in it and go.) You have to learn your bike and maintain it. You have tighten bolts when they come loose. Use lock tight if you have to. is just apart of owning a four stroke, from the boys @ H.D.
Mine is red and was bought out of flint, MI