I've just recently purchaced a 2001 tomos st and was wondering if the play in the rear sprocket was normal. The rear sprocket will move just a little before it engages with the back tire. also the 4 bolts that are on the sprocket are a little loose but there is this crazy washer that gets in the way of me trying to tighten them down. Its the one that raps a little over the bolts. This model is a kickstarter if that makes any difference.