You might consider this item: GL1100 Carburetor Repair Manual written by noted GL1100 guru Howard Halasz
This Tech Tip is provided courtesy of Howard Halasz – noted GL1100 Guru. Howard is a frequent contributor of technical columns and other information to GWRRA’s Wing World Magazine.
“A common failure with all GL1100s is the vacuum advance part of the pulse generator assembly. The units for the 1980 models use a higher advance angle than the unit for the 1981-1983 models.
Unfortunatley, the vacuum portion of this assembly is not rebuildable. GL1100 pulse generators are no longer available from Honda and good used units are hard to find now. But, the work-around is easy. Simply plug the vacuum fitting at the the #3 carburetor – the loss of vacuum advance will never be noticed other than a very slight decrease in fuel economy. Performance loss is also negligible.
Sometimes you will notice a tar like substance on the frame right below the GL1100 transistor spark units. This is usually a tell tale sign that the units are about to fail if they haven’t already failed. To prolong the life of the transistor spark units, disconnect them and remove them from the frame. Mix some 5-minute epoxy glue and fill the units where the tar melted out of them. Let the epoxy glue set until it is completely cured, and then reinstall the units.
Another GL1100 weakness, particularly with the ’83 models, is early turn signal flasher failure. The ’80-’82 models rarely had these failures, but they were quite common with the ’83s. Using an automotive flasher connected to the gray wire and black wire will fix the problem a lot cheaper and better than replacement with the Honda OEM flasher.
A unique electronic Honda flasher was used only on the ’83 models. It used a black 3-pin connector rather than the standard 2 blade flasher connectors on all other GL1100s.”
Howard Halasz, Wing World Technical Contributor – Houston, TX