Thanks for that, I do see that there are 2 bleed nipples on the front calliper, they are not working, so will find out what they look like inside when I strip them down, does look to be overcomplicated.

I do see that the diagrams you posted were for the 800, have been struggling to find decent details or a manual, would appreciate it if you could let me know where you got these from.

If I find the callipers are stuffed and need replacing, do you know what years and models  I could use to replace them with that will bolt straight up and only have a single chamber and line for the front, would like to go to a less complicated system if possible, if callipers are useable, then will stick to the current system for now as you suggested.Thankyou

Hi Guys,
I have only recently got a 2012 CF500-X5 that needs a bit of work.

Currently on the braking system, I have 2 master cylinders, 1 on the handlebars and 1 connected to the footbrake which also has a cable activation from the other side of the handlebars.

Following the plumbing I see that they are all connected, 2 front callipers and 1 rear, and all operate when using any of the braking mechanisms, even the front calliper has 2 pipes coming into it for a single piston.

This doesn't seem right, would like to have front and rear braking systems independent of each other in case of line breakage or something similar.

Has anyone replaced the distribution blocks, and blocked extra junction holes to separate the breaking circuit?,
if so which circuit do you use for the front and which for the rear?,
guess the footbrake master has more volume to run the 2 front calliper and the hand operated master for the single larger rear. does this seem the best option?

Would appreciate any advice as this is my first 4wd ATV.