Bleeding Brakes

p.ludlow · Feb 18, 2009

Hi to you all.
Brought myself a set of syringes after reading the bleeding your hydraulic clutch thread,not got round to doing it yet.What i would like to know ,if you can bleed your front and rear brakes in the same way.If so any tips or links to this method would be great.
Also would a 500ml of brake fluid be enough to bleed the brakes font and rear plus the clutch.Really enjoying this bike now,so much i would like to do.:biggrin

spoonz · Feb 18, 2009

I've not read the thread but generally you want to bleed from the lowest point up as the air will naturally want to flow upwards.

i've had best results on the back brake by pulling the fluid through with the syringe from the caliper rather than pushing it. Obviously caliper off and nipple highest etc on the brake.

amb67 · Feb 18, 2009

Me too Spoonz.

I found that on the rear brake I actually couldn't push the fluid through to the reservoir.

On the rear you have to unbolt the caliper and hang it up so that it's about level with the exhaust bracket. Then you have to insert an object between the pads so that the pistons don't pop out.

I also found that if you gently operate the brake lever whilst drawing fluid through it makes it easier to bleed and ensures all the air is out of the circuit.

For the fronts I found that due to the bleed nipple locations (on top) all you had to do was draw the fluid through as per normal and ensure the reservoir doesn't run dry.

All in all I think it took me an hour or so to do all the brakes and clutch and used around 400ml of brake fluid.

p.ludlow · Feb 18, 2009

:thumbup Cheers for that info.My clutch not as smooth now,and the fluid is slightly black, so think its a good time to change it along with brake fluid,so all jobs are done ready for the hot summer.lol:biggrin

amb67 · Feb 18, 2009

Don't forget to service your lever pivots too, this is often an area that everyone forgets to pay attention to.

I stripped mine down the other day and removed years of ***** from them, they operate so smoothly now.

p.ludlow · Feb 19, 2009

amb67 said:
Don't forget to service your lever pivots too, this is often an area that everyone forgets to pay attention to.

I stripped mine down the other day and removed years of ***** from them, they operate so smoothly now.

:thumbup Might seem like a silly reply,but are you on about handlebar levers.:biggrin

amb67 · Feb 19, 2009

Yeah, all those pivots, springs and washers that collect years of grime.

Strip them down and you'll notice the difference, smooth action.

Mine are like new now and all for 20 mins work.

badgermilk · Feb 19, 2009

I left my front brakes bone dry for a couple of weeks. Took me ages to bleed them then, around half hour!!!!
I have a non return valve stuck on a hose from halfords that i use. Although it does not completely stop the return of the fluid only slows it down, that way air/oil comes out of the bleed nipple into the tube; bubbles rise to the top and clean bleed oil slowly seeps back into the nipple. It works a treat cos I dont loose hardly any oil wooohooo

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