Welcome to the forums. The VIN should be stamped into the front bumper or behind the front bumper on a cross piece between the two vertical frame rails. If you find it, get the 10th digit (letter or number) and I can tell you the year.
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.