Been contemplating swapping out the stock MC on the 360 for a while now. The clearance on the stock M/C to the clipon mounting hardware is not enough to allow me the proper angle on the lever for comfortable operation. I've done a bit of research, and I know the caliper piston is 38mm, and the stock MC piston is 14mm.
As of right now, the front brake lever 'feel' is not great, there is short travel and progressive braking is not ideal. According to the MC ratiio chart that I see linked all over the place (http://www.vintagebrake.com/mastercylinder.htm) the factory ratio for the CB360 is at 7.37:1, and their 'sweet spot' is somewhere between 14:1-12:1 range. I take that chart with a grain of salt, as every brake set up is different. But I do believe a slightly higher ratio would result in a better feel at the lever. I have read about a few people switching to a MC with a 12.7mm piston, which would put the ratio somewhere between 9:1-10:1.
Here's one of the master cylinders I found with 12.7mm piston: http://www.ebay.com/itm/291462071546?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack=true
If there are other options that are compatible from modern sport bikes I'd consider that possibility, but I don't love the look of the floating plastic reservoir on a vintage bike. I've already bought new stainless brake lines, so I'd like to keep those compatible as well.
As of right now, the front brake lever 'feel' is not great, there is short travel and progressive braking is not ideal. According to the MC ratiio chart that I see linked all over the place (http://www.vintagebrake.com/mastercylinder.htm) the factory ratio for the CB360 is at 7.37:1, and their 'sweet spot' is somewhere between 14:1-12:1 range. I take that chart with a grain of salt, as every brake set up is different. But I do believe a slightly higher ratio would result in a better feel at the lever. I have read about a few people switching to a MC with a 12.7mm piston, which would put the ratio somewhere between 9:1-10:1.
Here's one of the master cylinders I found with 12.7mm piston: http://www.ebay.com/itm/291462071546?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack=true
If there are other options that are compatible from modern sport bikes I'd consider that possibility, but I don't love the look of the floating plastic reservoir on a vintage bike. I've already bought new stainless brake lines, so I'd like to keep those compatible as well.