Rear Brake fade! - MVAgusta.net
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post #1 of 22 (permalink) Old 11-28-2009, 06:26 AM Thread Starter
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Rear Brake fade!

Are any of you guys in the warmer areas experiencing pretty severe rear brake fad when the bike gets hot. Last couple of rides I've been for by about 1/2 and hour in I've got nearly no rear brake at all. As soon as she cools down a bit all is ok again.
I've bled the brakes and all is Ok there. Pads are fine too.
Is anyone else finding this and more importantly does anyone have a fix? Would Dot5 fluid help?

MV Agusta 05 F4 1000
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post #2 of 22 (permalink) Old 11-28-2009, 06:44 AM
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Can't recall ever using mine Andy....so nothing constructive to add from me.

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post #3 of 22 (permalink) Old 11-28-2009, 06:46 AM
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I was going to suggest you move the reservoir, but I see you have a 1000 and it has been moved already.
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post #4 of 22 (permalink) Old 11-28-2009, 07:47 AM Thread Starter
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Can't recall ever using mine Andy....so nothing constructive to add from me.
Yeah I didn't think I used mine much either but man you notice when its not there suddenly!

I was just thinking about some heat sheilding around the master cylinder. Think that would help?

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post #5 of 22 (permalink) Old 11-28-2009, 09:48 AM
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First thing I would check is to see if the pads are dragging on the rotor excessively. If so the rotor will get hotter than hell and may cause fade. I think anyway.

What I do is simply ride the bike a reasonable distance without using the suspect brake. Don't touch the pedal. Then pull over and put your hand on the rotor. If it's slightly warm that's fine as there's always a little drag. If it's too hot to touch then the pads are dragging waaaay too much and you need to research the cause.

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post #6 of 22 (permalink) Old 11-28-2009, 10:21 AM
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rear brakes dont really work anyway!!!!theyre crap!!
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post #7 of 22 (permalink) Old 11-28-2009, 10:39 AM
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rear brakes dont really work anyway!!!!theyre crap!!
You took the words right out of my mouth, your right the rear brake on a F4 is crap, I even tried different pads, but they were still crap.
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post #8 of 22 (permalink) Old 11-28-2009, 10:48 AM
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There is a good chance your rotors are glazed. Clean them with a scotch brite pad, re-bed them and see if that helps.
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post #9 of 22 (permalink) Old 11-28-2009, 04:55 PM Thread Starter
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No guys the pads are not dragging. The heat build up is at the mastercylinder. I've already checked the rotor for excessive heat when the brake has not been used and its all good. When the problem occurs the pedal and the mastercylinder are hotter than hell but the rotor is fine.

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post #10 of 22 (permalink) Old 11-28-2009, 05:23 PM
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Quote:
Originally Posted by devilboy View Post
rear brakes dont really work anyway!!!!theyre crap!!
So many people don't seem to understand rear braking. It's not meant to be the huge anchor like front brakes, but a way of balancing the bike. Try a little rear brake coming in to a corner and you'll find it helps turning in, unlike a handful of front brake that stands the bike up. Just my 2 cents worth.

Andy, I havn't found the brakes get worse on a ride, but I do find they need to be bled fairly often, but then again having a 750 my reservoir does sit on the back of the engine.
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