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Vacuum line question

Posted: Thu Sep 03, 2015 6:24 pm
by n5926g
Afternoon guy,s. I am in the process of "buttoning up" my 90 GL1500...After some confusion about the #12 hose,I have figured that one out(self induced)...Now...I have a "spare" #1 hose,and it is NOT the one going to the valve between the carbs...THAT line is in-tact,and goes to its control valve..( saw it with my borescope )the "other" #1 comes directly off the intake of the center LH cylinder...I do have a FSM,but the diagram is very vague.The book does agree however that there are in fact TWO #1 hoses....Can anyone tell me where that second hose hooks up to? :shock: