Topic: 5/8 Hayabusa Brake Master Cylinder

[tank410]

I am planing to do the dual disc conversion on my CB500. I have just bought a set of 550 forks form Honda!. I had a caliper and GL1000 master cylinder give to me when I bought the bike. But after close inspection the reservoir is cracked at the base. So my question is will a Hayabusa's master cylinder work?

[Wayne Meuir]

It'll probably work, but you may not have a mirror mount on it if the Busa has the mirrors mounted on the fairing.

I used a M/C of a Naked SV650 on my Waterbuffalo and it works great and has the mirror mount hole.

Wayne

[alltherightpills]

Are you asking if the ratio between the caliper piston and the mc bore will be okay?

vintagebrake.com/mastercylinder.htm has a chart that will show you what size mc to use depending on how big your caliper pistons are and how many you have. 

I recently used this chart to get a new mc off of ebay.  I didn't get into the perfect ratio range that he suggests, but I got close and my brakes feel awesome, and they work really well now too.

[tank410]

I am not worried about the mirror mount I running bar end mirrors

vintagebrake.com/mastercylinder.htm has a chart that will show you what size mc to use depending on how big your caliper pistons are and how many you have. 
I recently used this chart to get a new mc off of ebay.  I didn't get into the perfect ratio range that he suggests, but I got close and my brakes feel awesome, and they work really well now too.

So if I am reading the chart right with 2 38mm pistons I need a 11mm master cylinder.

[754]

that will be 7/16.

I used stock 750 m/c with good results..

[chippyfive50]

Don't know your budget, but the NISSIN MC (14mm) is REAL NICE.....$129.00  super smooth...
here is my setup..dual 750 disks on my 550.