Just acquired an '82 Suzuki GS550L and would like to know of the closest servicing available for it - I am in Niagara on the Lake I would also like to acquire a manual for it...........thanks Kaspar Pold

question edited for clarity.
Question moved from Suzuki Cars to model category.

Wiring

https://www.google.com/search?q=1984+Suzuki+GS550L+fuse+block+wiring+diagram

Service Manual

SUZUKI GS550 SERVICE MANUAL Pdf Download - ManualsLib

https://www.manualslib.com > ... > Motorcycle > GS550
View and Download Suzuki GS550 service manual online. GS550 motorcycle pdf manual download.

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Get a carburetor synchronizing tool and a service manual (OEM Suzuki, Haynes or Clymer). Synching a two carb engine is easy. There's only one screw to adjust, and it's usually between the carbs.

You have either a rectifier or charging coil(magneto) issue. The rectifier changes the AC pulse from the magneto to 12V DC. If that checks out, you'll need to test the magneto. Either case you'll need to have a multimeter handy and access to the factory repair manual for the testing parameters and wiring diagrams. Good luck!

I think you are on the right track. If manually lifting a float stops the flow of gas I would suspect bad floats. Remove a float and shake it. Anything inside? It should be lite as a feather. It looks like Babbitts has them in stock for a 550M. It should be the same part for a 550L. Please rate my answer. Thanks! www.babbittsonline.com

I dont know for sure but 1200 rpm is most common.

For each carb, turn the air screw and the throttle screw inward until they LIGHTLY seat. Now open each of them one and one half turns. This is the factory setting. If the adjusting screws are seated too tight, the jet will leave a ring indention on the adjuster screw. The ring is not a good thing and will affect performance. Please rate my answer.

not sure on the exact specs but flip the carb upside down and look how the floats look to the horizon of the earth. Sounds silly but that is how pretty much all bike mechanics set them, just make them level to the earth. Good luck

One is available for download from http://www.popupportal.com/manuals/Coleman/Coleman_1982.pdf