Yeah the parts are very hard to come by , I check Craigslist and market place everyday
I found MotoSport to have the best overall pricing with parts, and they were the only supplier with the carb holders in stock.
My 7S looked good when I bought it yet it took $1300 bucks in parts and tires and fork work to get it up to snuff.
My brake pistons and seals and pads I get from BrakeCrafters.
I don’t know how familiar you are with the zr7 but I vastly improved the handling with new springs and damper rods from Traxxion Dynamics. I have a thread on it somewhere.
I had two other bikes and a big scooter when I bought my 7S as a winter project. I didn’t realize at the time how much I would enjoy this bike. It ain’t the fastest but it ain’t bad and with upgraded forks, it handles like a cartridge fork bike because the damper rods I have have actual shim stacks in them set up for my riding style. No more excessive diving on the brakes. Money well spent.
Im keeping it.