Caliper seal roll?

[TUG]

My SRAD brakes lose pressure on their own, with the bike not moving over a few hours, but i don't know why, Its the well known problem with TOKICO calipers, and tbh other than stripping them for the 15th time (i fucking shit you not) and cleaning all the red grease out an seating them 'dry' i have no other explination for them being out of whack. I'll try re-seating the fork lowers and check the runout on the discs on sunday.
I'm just making a record and asking to see if others have experianced this.
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Haz ER-5, innit!

[lonner]

[TUG]

I'm sorry if a come across a bit brash here, but i've rebuilt brakes many times on a whole list of bikes, I've done everything you listed to no avail.
Aparrantly what i'm experiancing is Seal roll you can see the pistons return once the lever is released. Its got brand new seals in it, brand new braided hoses and a K5 radial master cylinder. So i've eliminated everything bar the calipers and discs.
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Haz ER-5, innit!

[Rockhopper]

The seals are meant to pull the pistons back i thought?

What exactly are the symptoms you are experiencing?

[TUG]

To an extent yes but not pull the piston back to a point where you have to pump the brakes again like your bleeding them to "seat" the pads to the disc again.
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Haz ER-5, innit!

[finpos]

Try OEM seals if you are not using them already, also possibly new pistons.

f.

[TUG]

[MaybeGuy]

ive always lubed the seals with brake fluid. You could try tears.
Any corrosion on the pistons?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[TUG]

[MaybeGuy]

they could be out of spec i suppose. crack out the haynes and a micrometer and see how they measure up.

seals in the right way?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[TUG]

[MaybeGuy]

well theres 8 pots in total, so dont turn them all around as that would be pretty thick, as statistically some of them have to be right.

find the edge and make sure its in right. fattest edge of the seal goes in first.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[sickpup]

[smegballs]

[bladerunner]

if the pistons are pulling back over time with the bike not moving..erm HELLO how can that be disk run out? I know the probs your having Ben..took me a fair while to get mine sorted and tbh if your taking the seals out and turning them round....not sure how well they like it happening 15 times unless your uber careful and keep them wet. I always clean out behind the seals and make sure that's spotless as well as using dot 4 safe grease to prevent any initial drag! Dont forget that they might need a bit of bedding in. i usually do this with the caliper off the wheel ,pump the pistons out a good few times and slide them back.

Only other real issue is blocked breather in the MC cap or the such!!
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[sickpup]