Hi i have a 1979 xs1100 and need to know where the vacum hose,s go on the carb have 4 mikuni carbs need to know proper fuel line set up as well can anyone help me thanks.

Hi i have a 1979 xs1100 and need to know where the vacum hose,s go on the carb have 4 mikuni carbs need to know proper fuel line set up as well can anyone help me thanks.

Should be 3 vacuum hoses. The ones from the petcocks go to the rubber boots on carbs 2 and 3 (the center 2) and the one from the bottom of the engine (vacuum advance line) goes to the vacuum port on the number 2 carb (the one ON the carb not the one on the boot).

Full Service manual Yamaha XS 1100 1980 :

http://www.ringler.us/xs1100/YamXS1100Manfull.pdf

182 mb.

Also, have a look here.

http://www.xs11.com/forum/index.php