vacuum advance unit


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racer59
Posts: 7
Joined: Wed Jun 15, 2011 11:01 pm
Location: Grafton,WI
Motorcycle: 1982 GL1100 interstate

vacuum advance unit

Postby racer59 » Sat Jun 18, 2011 5:54 pm



When I suck on the vacuum hose leading to the advance unit it does effect the way the bike runs. BUT, when I suck on that hose it does not hold that vacuum that I created. Should it?



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virgilmobile
Posts: 7655
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: vacuum advance unit

Postby virgilmobile » Sat Jun 18, 2011 6:49 pm

Yes it should hold a vacuum and change the timing.Starting at 1.6" and maxing out at 3.8".I guess that vacuum should be avaiable at the hose from the carb.

The vacuun advance canister is leaking


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