Re: How tight should the chain be??
mine's got about 1/2" to 3/4" of play.
when i put it together (using Manic Mechanic adaptor and aluminum sprocket) i get it as tight as possible, so there's no play at all. after a short ride, the teeth on the sprocket and the chain wear in so it loosens up a little.
i'm also not running a chain tensioner.