Brake bleeding help

[twister500]

07 E-ton viper 90 r. Replaced the rear caliper and pads. Tried to bleed the sysem and can't see any more air (bubbles) coming out. I ran 2 cans of brake fluid thru the system and still have a LOW handle. Did I miss something or should I look at a new master cyl.?

[beltburner]

make sure the disc isn't way out of spec from worn out pads. we had that issue as my girls like to ride the brake