The one day you forgot to put the chain on...
Discussion
My fazer was taken from driveway after I forgot to put chain on bike, then dumped on road approx 30 metres away as they realised it wouldn't start (dodgy side stand switch, would have worked if side stand was up). So after a replacement ignition barrel and new brake lever I took it to work. Little did I know there was no rear brake pressure. Checked it over at work brake pedals fine, pistons fine and moves straight. Attempted to bleed the rear brake as I thought that it being on the side for a few hours maybe air got in the master cyclinder, but the nut is seized and is rounding off, it's pretty small and I've ordered socket which should fit, any tips? The residue is acf50 
If it was working before, you could try tying a heavy weight onto the brake pedal and leaving it depressed overnight - the air bubble *might* rise out.
Otherwise you need something to get that nipple out. You can get knackered nut extractors (which have worked well for me on other things, this type of thing) but the reality is that if you put any welly on that nipple, it will shear.
I'd imagine a replacement used caliper off eBay will probably be £20 tops, unless they're made from unobtanium? They probably used the same one on lots of different bikes.
Otherwise you need something to get that nipple out. You can get knackered nut extractors (which have worked well for me on other things, this type of thing) but the reality is that if you put any welly on that nipple, it will shear.
I'd imagine a replacement used caliper off eBay will probably be £20 tops, unless they're made from unobtanium? They probably used the same one on lots of different bikes.
Krikkit said:
Being quite a common bike is it not worth just buying a 2nd-hand caliper and swapping it over? Saves faffing about drilling it etc.
I'm pretty incompetent when it comes to maintenance so I'm a bit reluctant, once the new socket set arrives this evening (got to love Amazon prime) and if it doesn't work then I may have to.CRC25 said:
Hazarr, it worked, however there was very little fluid coming out of the nipple, after removing most and replacing with new there is now no brake pressure atall, where as there was a small amount before, could it be an easy fix or rebuild brake caliper?
You are keeping the brake pedal moving while the nipple is open.Doesn’t need to be much just enough not to draw air in before you close it.
You’ll need to do a lot of pumping and closing if you’ve run the fluid out. You need to keep it above the minimum all the time.
If you can get hold of some pipe and a syringe you can speed up the process.
trickywoo said:
CRC25 said:
Hazarr, it worked, however there was very little fluid coming out of the nipple, after removing most and replacing with new there is now no brake pressure atall, where as there was a small amount before, could it be an easy fix or rebuild brake caliper?
You are keeping the brake pedal moving while the nipple is open.Doesn’t need to be much just enough not to draw air in before you close it.
You’ll need to do a lot of pumping and closing if you’ve run the fluid out. You need to keep it above the minimum all the time.
If you can get hold of some pipe and a syringe you can speed up the process.
poo at Paul's said:
Sorry to hear about your bike, so many thieving scummy b
ds about, drives you mad.
Glad you got it back.
As for the rear brake, if you had been on PH long enough, you'd know you don't need them on the road at all....!!
So unless you are doing track days.....
I can testify to that, I didn't realise until I relied on it when pulling up to the swipe card reader at the gates of my work when I realised there was no pressure and I nearly embarrassed myself...ds about, drives you mad. Glad you got it back.
As for the rear brake, if you had been on PH long enough, you'd know you don't need them on the road at all....!!
So unless you are doing track days.....All sorted now thankfully, will have to replace the bleed valve at some point as the rounding off is annoying but good for now
update
Still no brake pressure, thought there was but still unable to hold bike on an incline, I've been defeated and will need to go to garage -_-
Edited by CRC25 on Thursday 6th September 16:30
trickywoo said:
Rubin215 said:
Push the piston back in to the caliper and then bleed it through the brake hose banjo bolt.
Pretty much guaranteed to leak if you do that.The washers are truly single use unless you re anneal them.
I would never bother to change a washer unless it was obviously deformed and it won't end up deformed unless you over tighten the banjo bolt.
Bleeding through the banjo only requires you to loosen the banjo bolt enough to let fluid past and then nip it up again before you release the pedal; the reason for pushing the piston home first is to get as much fluid (and air) back out of the caliper and into the hose so it will come out at the banjo when you loosen it.
CRC25 said:
disassembled the rear caliper and found there was no shims or seals, seal kit/shims ordered (£60 later) and if all works saved some cash and learnt something.
I assume the fact the pistons not going back using hand pressure would explain the lack of brake pressure?
If there were no seals in the caliper at all, then all the brake fluid would have leaked out and the piston would just rattle about.
Do you mean the dust seals (the thinner of the two grooves, closer to the pads)?
Rubin215 said:
CRC25 said:
disassembled the rear caliper and found there was no shims or seals, seal kit/shims ordered (£60 later) and if all works saved some cash and learnt something.
I assume the fact the pistons not going back using hand pressure would explain the lack of brake pressure?
If there were no seals in the caliper at all, then all the brake fluid would have leaked out and the piston would just rattle about.
Do you mean the dust seals (the thinner of the two grooves, closer to the pads)?
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