Rear sprocket came in!
This thing is a featherweight. Full 7075-T6 47 tooth 520 sprocket, not the fanciest one they sell but with the high wear rate I'm not willing to spend $80+ every time I need a new one.
Dreading the work ahead I decided to buy a front sprocket on the assumption I'd need to machine it anyway. My local race shop had one in stock for an '04-'12 CBR1000RR.
If you're unaware, every Honda (post 79 at least) uses the same output shaft spline, so it's trivial to mount any sprocket. I needed about a 530-sprocket width offset to get the front in line with the new rear, and since I was able to find no offset sprockets for the DOHC CB750 I had resigned myself to having to fabricate something.
Welllllllll I popped the CBR sprocket out and noticed that it was offset rather far to the inner side. But since sprockets are round they work the same backwards, so I flipped it around and popped my chain on to see how much more I needed to push it out.
Bam! Super super happy with the fitment, super glad I don't have to turn the teeth off the stock sprocket to make it into a spacer.
With that sorted I broke the chain to length and almost made an expensive mistake when I broke it a link shorter than intended.
Luckily it still falls within the adjustment range of the swingarm and I don't have to run two master links like a buddy of mine who bought a bigger rear sprocket and broke his new chain to match the old length
So now all that's left is to get my carbs back from my buddy who needed a set to get her bike running for an event a couple months back, then a quick harness build once my connectors come in.
Friday I plan on laying up a carbon fiber electric tray/fender for the rear to hold everything that will be hiding under the seat so look for pics of that process this weekend!