78 750 still will not run with choke off

Posted by dumbar on Jun 19, 2011; 10:10pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/78-750-still-will-not-run-with-choke-off-tp3084074.html

This set of carbs has a second set of hoses connecting the bodies of  the carbs.  there is also an open fitting coming out of this set of conecter hoses that is connected to nothing. I have a second set that has only the one set of connection hoses located toward the rear(or inlet side).other than that the carbs look identical.  The engine runs fine with the second set, but still will only run if choke is on with the first set. I think both sets are 78 (Keihin). What is the purpose of the second set of connector hoses and should the outlet be pluged or conect to ?what?.