Front brake pulsing ... cured itself eventually. - Page 2

Darren69 · 30-12-2015, 01:19 PM

I think also the pressure changes from the fluid when you release the level will also pull them back.

Mr Gazza · 10-01-2016, 05:37 PM

I remembered this tread this morning, when I came to a crossroads and caressed the front brake up to the line.....And there it was...The gripslipgripslipgripslip thing.

It was the first ride since Boxing day, when I gave it a good wash and observed the slight oxide patches under the pads. (post #3)

I've lost count of how many times I've laid the bike up this Winter, but a January ride is a very unexpected bonus..Maybe this is the final lay up?

So I remembered the brakes again as I approached the same crossroads from the other way on the way home.
The road is straight, dry and empty, So I wound up to some considerable knots and gave the front brake a good long hard pull....Coasting the last few yards with the brake sensitively feathered was as smooth as an Oyster slipping down Holly Willoughby's throat.

...And that concludes the case for "pad patches" for me.

Darren69 · 10-01-2016, 06:02 PM

I think I would most likely crash if I thought that about Holly Willoughby when braking!

utopia · 10-01-2016, 07:53 PM

Good info there, Gazza.
I'm now fairly convinced that this is one of the mechanisms which cause brake pulsing.
I doubt that its the only one, and it may not be the most significant but I would wager that it is part of the picture.
Furthermore, I would wager that it is highly likely that it can operate in conjunction with other factors involved in the "surface conditioning" of discs, and may make those factors even more significant.

I have now removed my discs and the plan is to fit fully floating bobbins.
I am not going to clean or abrade the braking surfaces in any way though (much to Capo's consternation), and thus I hope to be able to detect if they have any benefits in this area.
Of course that's not WHY I'm fitting them, but it could be a useful secondary experiment.
I'm not holding my breath though ... its a long(ish) shot.

ps. I found your edit amusing !!

30-12-2015, 01:19 PM	#16
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,025	I think also the pressure changes from the fluid when you release the level will also pull them back. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

10-01-2016, 05:37 PM	#17
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,827	I remembered this tread this morning, when I came to a crossroads and caressed the front brake up to the line.....And there it was...The gripslipgripslipgripslip thing. It was the first ride since Boxing day, when I gave it a good wash and observed the slight oxide patches under the pads. (post #3) I've lost count of how many times I've laid the bike up this Winter, but a January ride is a very unexpected bonus..Maybe this is the final lay up? So I remembered the brakes again as I approached the same crossroads from the other way on the way home. The road is straight, dry and empty, So I wound up to some considerable knots and gave the front brake a good long hard pull....Coasting the last few yards with the brake sensitively feathered was as smooth as an Oyster slipping down Holly Willoughby's throat. ...And that concludes the case for "pad patches" for me. __________________ Last edited by Mr Gazza; 10-01-2016 at 06:34 PM.. Reason: Had to alter Holly a little bit..

10-01-2016, 06:02 PM	#18
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,025	I think I would most likely crash if I thought that about Holly Willoughby when braking! __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

10-01-2016, 07:53 PM	#19
utopia No turn left unstoned Join Date: Jun 2010 Location: leicester Bike: M750 Posts: 4,545	Good info there, Gazza. I'm now fairly convinced that this is one of the mechanisms which cause brake pulsing. I doubt that its the only one, and it may not be the most significant but I would wager that it is part of the picture. Furthermore, I would wager that it is highly likely that it can operate in conjunction with other factors involved in the "surface conditioning" of discs, and may make those factors even more significant. I have now removed my discs and the plan is to fit fully floating bobbins. I am not going to clean or abrade the braking surfaces in any way though (much to Capo's consternation), and thus I hope to be able to detect if they have any benefits in this area. Of course that's not WHY I'm fitting them, but it could be a useful secondary experiment. I'm not holding my breath though ... its a long(ish) shot. ps. I found your edit amusing !!