How do you remove the seat and gas tank 1985 Honda shadow 700c?

You will need 10mm and 12mm wrenches. Start by removing the tool kit on the back of the buddy seat. Remove the two nuts near the top of the Tool Kit compartment. The buddy seat comes off as you pull the seat towards the back. The main seat has two bolts at the back near where the buddy seat tongue hooked under it. Remove those two bolts and the main seat comes off just like the buddy seat. The main gas tank has one bolt at the back and two bolts at the front. take off the bolts and the bushings that pass through the rubber grommets. Before removing the two hoses running from the main tank to the secondary gas tank, you will want to have drained all of the gas from the tanks, which is probably easiest to do by removing the fuel hose that runs from the petcock to the fuel filter and draining into a clean gas can.