hey guys,don't get me wrong-i really appreciate all the hard work and advice i see here,but i've got a serious concern. are these chinese kits really feasible as a regular commuter,or do they require so much maint. and have so many problems that they are basically just something to toy around with for fun? they are cheap-it just seems from all the problems i'm hearing ,(and exp.) ,that you basically have to rebuild the thing and re-engineer it almost every time you ride it-at least any distance. does anyone out there have all the bugs out to where they can ride it on a reg. basis without something screwing up?, and if so,what all did you change?