Gentlemen, I have had my 500 for about a month. Engine and Body done well but previous owner stopped there. I just put new wheels and tires on and working on other misc. items. Does anyone know what the lug nuts should be torqued to? Also, horn doesn't work. How is the horn button removed? Tried to pry it off gently with no success. One more question; Is the size of the engine displayed on the engine where the serial number is? How do you tell what size engine you have?