My 80 honda express 2 just started to kill today. I just changed the headlight yesterday, but I don't think this has anything to do with it. Electrics seem to be fine. It back-fired a few times and then would kill after losing power. I had to restart it several times to get home. I felt like it would build up pressure in the cylinder, and like I said sometimes backfire. Is this just a spark plug problem, or something worse? A slight squeaky noise seemed to becoming from the engine too. All my fluids are full. Is there maybe a problem with oil getting to the piston? Arg I just get something fixed and something else has to go wrong.