I upgraded my front brake, first. On the pre 2014 bikes, the front brake system was not very good. Although a good set of pads fixed it, I wanted to go further, and did.
Along the way, I found this old chart. There was very little info available. This chart is old enough to where the guy used his rd350 as an example, so it's old. I didnt much think about the chart as it had to be hopelessly outdated, and useless. Too old. Technology changes, right? Turns out, not so much. The chart is very accurate, and what he said was right on.
So, to the rear brake. I decide the chart is too old, outdated. Technology changes. Once again, I was the fool. Turns out, the chart is still correct.
Our front master cylinder, to piston ratio fell right inline with what it should have. The rear , not so much. Our stock system uses a 14mm master cylinder and a 38mm single piston. According to the chart, that works out to a ratio of 7.37.
The old, antique, outdated chart says "Single piston calipers are much happier in the 14:1 to 12:1 range" again, it had to be bullshit....rd350? Serious? That's older than Kenors and I, put together.
I started checking the euro brands. Sure enough, the Ducati's, aprilia, and even the high end BMW s1000rr carbon frame bike . Sure enough, theirs were all in that 12 to 13 ratio. When I set my bike up at that 12.7 ratio, my rear brake started to have feel. That feel lasted all the way to the point of locking it up. You really have to work at it to lock it up. The feeling is there, and you know you are screwing up when you do.