Bleeding brakes - VFR.

hello all.
Bleeding the breaks on the vif after fitting some nice goodrich braided lines.

Now im pretty sure that the lines and calipers are full as it shoots out when you open the nipples and compress the lever.
But no compression what so ever, so is there somthing i missing??

Which brings me to:
the whole in the resivour where the fluid goes through to the master cyclender normaly has a little metal cover with a hole in it. this has come free ( dont know how but it has ) could this be effecting why im not getting and compression.

Also not sure if theres a leak on the master cylender or not but it worked fine before i put the lines on

Thanks Brock.

[johnnyrod]

The plate is there just to prevent the fluid fountaining inside the reservoir so it doesn't matter. You might still have air in the m/cyl, or another high point in the system. My method is the usual beelding, then lean the bike over until the banjo of the m/cyl is pointing a little downwards and then feather the lever a few times to get the bubles out. If it's really bad you see the bubbles and hear a squishing sound. Maybe there's a better way but it works for me! If that isn't it, could be knakcered m/cyl seals, it'll pump but not much pressure.

Already put on side stand but ill hike it over when i get home to see if i can shift any more air.
also this is just after a caliper rebuild so new seals, cleaned up pistons and re greased.

Could pulling the pistons out abit to draw fluid through help you think?
Im willing to try anything atm.

[johnnyrod]

Check the angle of the top banjo bolt, the sidestand might not be enough to make it point downwards, I lean mine right over and support it with my knee at about 45 degrees, it's only for a minute. The seals I'm talking about are in the master cylinder not the calipers. Personally wouldn't have used piston grease, can make the pistons suck back in, but it seems to be a moot point. Tugging the pistons wouldn't help though. I presume you're sure you have all the air out of the calipers? You don't have a brake line set-up that loops from one caliper in a hooop over to the other, do you? You don't see it much but it makes a high spot in the middle of the line, plus they're illegal for racing and generally a bad idea.

Nope standard 2 line set.
I know the master cyclender seals should be ok as they worked fine only a few days ago and theres no sign of leeking or drips that i can see.
I suppose more bleeding, leaning will have to be done 1st.
ill investivage the calipers to make sure im not getting any air stuck in them 1st though

Check that the bleed nipple is uppermost on the caliper too, sometimes their at a slight angle and air stays at the top of the piston area so loosen the bolts and tilt it. Or, take the caliper off, pump the lever till the pistons move out a bit, then squeeze them back in holding the inlet hose uppermost and that should push all the air up the pipe to vent at the master cylinder.

[johnnyrod]

If the m/cyl seals are duff the fluid doesn't usually escape to the outside world, it just won't hold pressure. The fluid leaks back into the reservoir so you don't see it happen. Method above shoudl also work but some people say you can damage the seals by forcing fluid backwards, not sure how much of that is true though.

My bleeding trick, which I have used the last 2 times (in the last 2 weeks, new calipers and line, then new master cylinder) is to first backwards bleed, that is attack a syringe full of oil onto the calipers bleed niples and push oil up the system, do one at a time and then once that feels ok. Then bleed down from the top like you might normally, make sure keep going till the lever feels solid like you want it and then you are done.

Often when the master has air in it it simply wont prime at all. A real pain in the ****.

After that mine have felt absolutely solid, so providing no physical issues it should be fine.

Should be ok if you squeeze them slowly i would think, i`ve done it that way before on various things with no probs.

Haha i have defeated it!
Tilting and light tapping on the calipers for a few mins either side and it all came out, almost spitting so i suppose there was just abit not shifting, strange how this never happened with the sv.
anyways
Thannks guys for all the advice