So in messing with my sons GL1200 I found a vacuum hose dangling. Goes to the CDI, so I figured some sort of advance since there is advance on 1st and 2nd gear. I checked the Manuals I have and I'll be danged if i can find it. I even looked at mine (same bike) but its so tight I cant see where it goes. I will lok in the manual again tomorrow if no-one knows the answer.