Re: '75 CB550 "Autumn"
Just found a sweet deal on a set of NOS cb750 pistons/rings/pins on ebay so that's done. .25mm oversize, so that'll give me 2.75mm oversize, around 595cc. *EDIT: 596cc to be exact** Will be needing to machine the pistons a little to fit the 550's smaller combustion chamber, but that should be straightforward. Having a hard time finding a cb650 cam...anyone have one?
Stability wise, I'm not happy with the front brake caliper sitting in front of the fork, so I swapped left and right forks so the caliper would be behind the fork. Good thing both lower forks have caliper mounting holes! The right (now left) mounts do need to be machined down a little to match the other side, but other than that, it looks to be a perfect fit. Curious why Honda didn't make them mirror images of each other...
I also got the frame stripped, and will be cutting it up shortly. I know, I have to break out the camera and stop being lazy. I'll get some pics up one of these days, I promise.
I do have one though. Check out the blob of shit that came out of the (very corroded) caliper when blew the piston out. I HAD to take a cell phone pic of that. It's amazing the brake even worked.