did the brake fluid level in the MC drop too low (i.e. below the small hole at the bottom of the resevoir)?   If so, you need to bleed the brakes (you prolly do anyway).

In my opinion, brake bleeding kits only help to draw most of the brake fluid down tot he caliper, but not in removing air from the lines...

okay... you drained all the brake fluid?

close up the bleed valve at the caliper.  open the MC and have a bottle of brake fluid handy...  make sure the union bolts are are on there good and tight (not over tight, of course).  start pumping the brake lever.  you should occasionally see air bubbles coming up from the bottom of the MC.  Keep doing this.  for a long time.  you will not get any pressure for quite a while.  Whenever the MC gets low, add more fluid.  DO NOT let the level of fluid go down to the little hole...  after a while, the air bubbles will stop coming up... now you can bleed the brake at the caliper.  You can leave the bleed valve at the caliper closed b/c as you actuate the brake lever, it will force brake fluid down there and the air bubles, being less dense, will rise.  It MAY be quicker to leave the blled valve open and just keep pouring brake fluid intot he MC and ground (i.e. out the bleed valve), but most likely air will keep slipping in through the valve....

ALSO, you are using eitehr DOT4 or 3 bake fluid, right?  Not 5?  5 will eat the brake lines, I think.  Also, don't mix the different spec fluids...  If you've done this, you need to flush the whole system...

sice you've taken all the fluid out of the lines, a mighty vac kit would definitely be a time save instead of just pumping away at the lever...

i found speed bleeders on ebay.  they replace the stock bleeders.  they have teflon coating on threads, and a spring loaded ball check valve.  when loose, the check valve works, when tite, the bleeder is shut off just like the stock bleeders.  I have all my parts now and will give it a try soon.

vroom1776 wrote on 12/31/69 at 16:00:03:

I thought it pulled the fluid way too fast for the amount in this bike.  It'll dang sure drain it quick when you're changing the brake line though.

Yeah, they have a kit like that for about $2 at Harbor Freight.