Anybody have some advice for me on bleeding a 2001 Arctic Cat brake system?

Ok, here's the deal. I bought a new Arctic Cat master cylinder. I installed it and now I cannot get the system to bleed. The brake handle has almost no resistance at all. I started bleeding at the rear caliper and worked my way around to the front. I even gravity bled them for awhile. I worked on it for about three hours yesterday until I couldn't stand it no more. I need some advice please.

 

they're a pain. mine have been to the shop 5 times under warrenty. i did the same , blead them, changed the master cylinder, and the rubber piece in the handle. they allways worked great when i picked my bike up, but as soon as i got it home, it was back to having no brakes. just from the ride home on the trailer. didnt make sence. i gave up and rode it anyways. finally i needed new brake pads so i replaced them. i dont know what that did but they worked for 2 yrs. now its back to no brakes again. the dealer said not to use the bleeders on the calipers but to pump the hand lever slowly. still never got it right. i havent heard any issues with the new ones os i guess they fixed the problem.