Noticed a wierd clacking noise when i was riding my RC the other day. put the bike up on the rear wheel stand, started it and put it into gear to let the wheel spin and the chain was bouncing all over the place, almost seemed like it was binding up or something. Replaced the chain today and the same thing is happening so i pulled of the front sprocket cover and checked in there. nothing that looks like it was binding the chain but it was bad enough that on the stand in 1st gear it would bind and stall the engine out so i took the front sprocket completely off and it was still making the clacking noise but only in gear not in neutral. sounds now like the transmission was binding? anyone have any suggestions or had this problem before? any help would be appreciated only been without my bike for a day now and im already going crazy.