When the front caliper on my sherco went i found it wasnt much more expensive to change the caliper to the indestructible ajp 4 pot, but you will need a new hose at the same time.
Another thing to look out for is the rear brake caliper, make sure you keep plenty of pad in these as the pistons in the rear caliper are very short and are easily damaged if they come out too far, mine started cocking to one side and wouldn't return once they came out and in the end i replaced the whole system with ajp and havent had a problem since.
Also if you do in future decide to change to an ajp rear, make sure you change the rear wheel disk side spacer to the thicker one