After spending the better part of the last couple of months reading hundreds of posts on this forum, I've finally been able to dedicate a bit of time to working on my 1976 550F that I bought early this spring. It started out as a PO's abandoned project and so far I've replaced or reassembled the controls and reattached them to the bars; disassembled, cleaned, and reassembled the carbs; de-rusted the tank; swapped out the painted fenders for chrome; rebuilt the front caliper; painted the tank and side covers.
Here's the bike when I first got it
Here's the rust inside the tank
This is the industrial toilet cleaner I used (20-40% phosphoric acid.) Since I couldn't find Prep & Etch here (in Canada) I was able to get this stuff from a janitorial supply company for only about $4 per bottle, dumped a couple litres in and shook it up every 10 minutes or so. It's super sticky stuff so it hangs onto the sides of the tank pretty well.
This is after 45 minutes or an hour, drained, rinsed, and fogged with a light oil.
This weekend I finished the clear coat (Spraymax 2K) after painting the tank and side covers with acrylic enamel a couple weeks ago and putting on the new decals.
So that's where I'm at right now. Hopefully tomorrow I'll be getting a call from Acklands-Grainger to let me know that my tube of Dow High Vacuum Grease is in so I can lube up the front brake, reinstall, and bleed it. Then I suppose it'll be time to set the fire extinguisher close by, put some fuel to it and cross my fingers. When I momentarily hooked up the battery and turned the ignition on (just to see if anything would light up) everything seemed to work so hopefully all my connections are good. I've done all the 3000 mile maintenance stuff and I guess once I (try to) fire it up I'll be able to see what other issues I have.
Anyway, in the meantime, I thought I'd finally contribute something here but mostly I just wanted to thank everyone for unknowingly helping me, this place is truly invaluable.