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Does anyone here understand the working of the ignition timing vacuum advance on a GL1100? I searched the archives, but didn't find what I was looking for.
I have suspected that this unit was not advancing the spark properly with the vacuum diaphragm. I disconnected the vacuum tube from the carb and found that the port was not producing any measurable vacuum, so I connected it instead to one of the ports on the inlet manifolds. Engine speed increased and acceleration was better, except.... there was a constant ticking noise coming from the pulse generator, which I assumed was a result of the "pulsing" vacuum produced by the port on the inlet manifold.
What is the source of the vacuum at this additional port on the carb? Does something need cleaning out in order to give me a vacuum for the pulse generator? Or should I ignore it and feed it from an inlet manifold and puta restrictor in the line to even out the vacuum?
Any words of wisdom would be much appreciated.
Thanks.
Gilbert
Does anyone here understand the working of the ignition timing vacuum advance on a GL1100? I searched the archives, but didn't find what I was looking for.
I have suspected that this unit was not advancing the spark properly with the vacuum diaphragm. I disconnected the vacuum tube from the carb and found that the port was not producing any measurable vacuum, so I connected it instead to one of the ports on the inlet manifolds. Engine speed increased and acceleration was better, except.... there was a constant ticking noise coming from the pulse generator, which I assumed was a result of the "pulsing" vacuum produced by the port on the inlet manifold.
What is the source of the vacuum at this additional port on the carb? Does something need cleaning out in order to give me a vacuum for the pulse generator? Or should I ignore it and feed it from an inlet manifold and puta restrictor in the line to even out the vacuum?
Any words of wisdom would be much appreciated.
Thanks.
Gilbert