Trying to bleed the front brakes on this r6 track bike im building.. (2001) When i bought the bike the brakes were squishy, so i figured they needed to be bled, so i thought i'll just replace the lines to SS while im at it. Replaced the lines, replaced all the copper washers. I've been bleeding for about 30mins with no luck. I've bled lots of brakes and clutches and never had this issue. I'm thinking the master cylinder is possibly bad? Is that common on these bikes? The method is as follows:
Dot 4 fluid full, submerge hose in fluid, pull handle in all the way, open valve, allow bubbles to come out, close valve... Pump furiously, repeat about 100x... Any ideas?
Thanks!