I am working on Cafe CB650 Project and I have a few questions I can't find answers to in the searches I have done.
1. The PO made some changes on my bike. I need to confirm that my current 5/8" master cylinder will work properly with the 42.8mm single piston caliper I have on my bike. The searches I have done tell me the hydraulic ratio would not be right. The MC should be ~12mm to get the right power.
![](http://i963.photobucket.com/albums/ae116/adrianm1972/21a515ae.jpg)
![](http://i963.photobucket.com/albums/ae116/adrianm1972/e97bea11.jpg)
2. I would like to get brass swing arm bushings but all the p/n cross ref's I look up say the 1981-82 CB650 swing arm uses a unique bushing. Is this correct. I have read that they are dimensionally similar to other bikes but a diff p/n due to a change in material.
I just want to make sure I order the right stuff. I have been caught out a couple times and ended up ordering the wrong parts because the PO had changed to something from another model/year.
Here is my build thread on Do the Ton (prob going to move it here as I am here a lot more often now):
http://www.dotheton.com/forum/index.php?topic=34165.0