New to Suzuki 83 GS550L in Wisconsin, needs some work.

[Steve]

I have done a couple sets of BSW30 carbs. Yeah, they are a little different, but the o-ring kit will work just fine.

With just a little time and effort, they can look like this:



.

[LAB3]

Some people prefer to use carb dip, I've been using Pine-Sol for literally decades, two parts Pine-Sol to one part water. Granted, your carbs will darken just a bit especially after rinsing them with straight water afterwards, if that's an issue for you then go with the carb dip. After you've used the dip it's still plenty good as an all around cleaner and degreaser for your other parts, you might want to try soaking that chain in it, then some oil for a few hours after that.

[Wingsconsin]

I am not far away from you -
Madison is about 50 miles - I own an ultrasonic cleaner that those carbs will do well to visit.
I use Simple Green and water and can get those carbs fairly clean -
I have not done a set of those like yours are -- but once they are apart we can clean the heck out of them .
I also have some carb jet files (needles) to poke through each jet hole and be sure they are open.
Just reach out if you want a little help -- I can provide a work space and some tools -
Just the GSR thing to do.