Rebuilding brakes - Qiuck question

[Matchless]

Maybe not your problem, but.... I replaced my front master cylinder and thereafter had good braking, but had to pull the lever nearly right in. Triple checked everything and discovered that I had replaced a 5/8 bore with a 1/2 inch bore M/C cylinder. Apparently at least a 5/8 bore size is needed for a twin disk bike. This morning I fitted a 5/8 inch M/C and my brakes are back to normal, just needs a bit of a harder pull than the smaller bore one

[TheRedlineMan]

OK, i installed the lines, replaced all the seals, and put the whole kit back together. the rear brakes are working great. nice and solid feel with no excess lockup. the fronts, however, still feel soft. i bled the system and can't see any more air coming out. i replaced the front lines with a double-banjo fitting from the master cylinder and lines that go directly to the calipers. i'm bypassing the anti-dive thingie.

could there be air somewhere and i don't know it? or could the master cylinder plunger be leaking? i don't see anything dripping, but maybe it's not building pressure? the brakes work, but you have to squeez the lever 90% before they start to engage.

any help would be great.

thanks,
brian

Keep bleeding them, they can be cantankerous things to do. With the new braided steel lines you aren't finished till the lever action is a lot firmer than before.

[chef1366]

Take off the brake leve and the M/C cap. Then push in the piston with a phillips screwdriver or the old piston. This pushes the piston into the master cylinder farther than the lever does and it get the last of the little bubbles out of the M/C.

[baco99]

cool. i think i got it flushed out now. still doesn't bike immediately, but there's plenty of pressure once the handle is down about 20%. can't wait to ride it!