bleeding front brakes problem

[Ish]

Hi

On my B1H ZX6R there is too much play in the lever where the lever moves about 1/3 of its total movement before the brakes start to bite. The bike has braided hoses.

Yesterday we tried to bleed the brakes with a pressure bleeder at a friends garage. We used the method of bleeding from the reservoir down and also from the calipers up. We also cracked off all the banjos to get any air that may be stuck.

While there was as light improvement it's still not a solid lever.

I don't know if it's relevant but when we finished bleeding and the pressure bleeder was still switched on the lever was solid but as soon as the bleeder was removed the play in the lever came back.

Could this me a master cylinder problem or am I missing something else?

 

[Ish]

Could be the seal on the MC's cap has had its chips, tho I don't see what loosening the banjo's accomplishes as all your doing is introducing air & knackering the compression washers on the banjo's, which are only good for so many compressions before they stop making an effective seal.

Loosened banjo while system was under pressure.

 

[Ish]

if you pump the lever does it get rid of the free play? solid lever

tried tying the front brake on and leave it overnight then see

tokico brakes are a bit crap tbh,my front brake lever is slightly soft till I pump it

Pumping doesn't get rid of the free play.

Will try tying overnight.

 

[Ish]

Also been advised to blank off brake hoses to rule out whether is a caliper or master cylinder issue so will try this as well.

 

[Ish]

Haven't had a chance to go back to my mates garage yet to narrow down the problem but have found options to deal with either case. If it's MC you can buy a rebuild kit for about £20 and if it's calipers found a place that refurb the calipers including repainting for £144. Mine do need repainting so may take this option rather than a seal kit.