New discs for m1100 evo

Dingdong Dom · 08-08-2020, 01:55 PM

Hi, I’ve had my evo1100 for about 11 months now and since buying I’ve had a pulsing in the front discs when slowly coming to a standstill, I’ve had the discs straightened as they were warped slightly but it’s only made a marginal difference. They seem to get worse when they get hotter as well. Was wondering if anyone can recommend replacements and a good place to buy them?

Luddite · 08-08-2020, 04:03 PM

I had "fluctuation of brake effort" as an MOT advisory for a number of years but couldn't feel anything myself. I wasn't convinced they were warped but replaced them with some Brembo Goldlines nonetheless and I've had no MOT comments since. They are better quality and lighter than the OE Brembos but £285 per pair against the £480 of the OE discs (2½ years ago).

Serie Oro, left - OE, right

Try Simon at WSC Performance who gave me a really good deal. http://www.ukmonster.co.uk/monster/s...ad.php?t=56141

Before committing to replacements, I'd recommend you try Mr Gazza's "Italian Tune", which may improve things, if your discs aren't actually warped. http://www.ukmonster.co.uk/monster/s...35&postcount=3

Luddite · 08-08-2020, 04:08 PM

PS if you do go for new discs, don't forget to match them to new pads, too.

http://www.ukmonster.co.uk/monster/s...ad.php?t=58084

Mr Gazza · 08-08-2020, 04:58 PM

Quote:

Originally Posted by Luddite

Before committing to replacements, I'd recommend you try Mr Gazza's "Italian Tune", which may improve things, if your discs aren't actually warped. http://www.ukmonster.co.uk/monster/s...35&postcount=3

To be honest my gut feeling is that these discs are actually warped as Dingdong says it gets worse when they are hot, and a previous effort to straighten them has been made.

By all means give the Italian tune up a try, but take care as it will most likely make them worse if they are warped. I think you will notice this at the end of the long hard brake as you let the pressure off the lever, in the form of the pulsing turning into shuddering.
If that happens ride carefully home and order the new discs. If you get lucky send me a packet of chocolate Hobnobs..

Rrawlings · 09-08-2020, 07:11 AM

My evo had a bit of a feeling like warped discs at slow speed so took the wheel off and spent a fair bit of time cleaning the bobbins and twisting them with a nut, bolt and some washers to get all the crud out. Put back and when tightening the callipers to the right torque apply pressure to the pads to centralise the callipers to the disc and since then no issues at all so might be worth a try for the sake of a couple of cans of the brake cleaner that screwfix sell at a decent price

Dingdong Dom · 11-08-2020, 04:45 AM

Thanks for the advice so far, here’s the thing, I had the discs straightened at motoliner in Maidstone, I returned the wheel with the discs on to be checked, when tested with a dial gauge they proved to be true, the guy at motoliner noticed that the wheel had no weights on it and balanced the wheel for me, I’ve tried cleaning the buttons on the discs and replaced the pads but it’s just the same? After the first straightening there was an improvement, there’s no pulsing in the lever just (as described by someone else) a nodding dog syndrome. I’m convinced it’s the disc's as there’s nothing when braking with the rear brake only. Thanks again for the advice.

crust · 11-08-2020, 05:42 PM

Have you checked the steering head bearings?

Mr Gazza · 11-08-2020, 06:15 PM

If you've established that your discs are true, then that only really leaves the "surface conditioning". The amount of friction between pad and disc can be effected by contaminants, such as resins in the pad itself and invisible corrosion on the stainless steel discs. (which contain iron.)
Nature being what it is, these contaminants/corrosions don't distribute themselves evenly round the discs and so you often feel the different areas of friction quite vividly in the form of pulsing or nodding dog syndrome.

Nice clean discs and pads, plus lots of heat and friction will often resolve this and condition the discs back to full smooth effect.

Follow Luddite's link to my instructions as to how to do this. Note this is free! http://www.ukmonster.co.uk/monster/s...35&postcount=3

boris · 12-08-2020, 11:13 AM

Good info here too:

https://ebcbrakes.com/articles/motorcycle-bed-in/

https://www.ferodoracing.com/product...s/pad-bedding/

08-08-2020, 01:55 PM	#1
Dingdong Dom Junior Member Join Date: Sep 2019 Location: Thundersley Bike: M1100evo Posts: 21	New discs for m1100 evo Hi, I’ve had my evo1100 for about 11 months now and since buying I’ve had a pulsing in the front discs when slowly coming to a standstill, I’ve had the discs straightened as they were warped slightly but it’s only made a marginal difference. They seem to get worse when they get hotter as well. Was wondering if anyone can recommend replacements and a good place to buy them?

11-08-2020, 06:15 PM	#8
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,796	If you've established that your discs are true, then that only really leaves the "surface conditioning". The amount of friction between pad and disc can be effected by contaminants, such as resins in the pad itself and invisible corrosion on the stainless steel discs. (which contain iron.) Nature being what it is, these contaminants/corrosions don't distribute themselves evenly round the discs and so you often feel the different areas of friction quite vividly in the form of pulsing or nodding dog syndrome. Nice clean discs and pads, plus lots of heat and friction will often resolve this and condition the discs back to full smooth effect. Follow Luddite's link to my instructions as to how to do this. Note this is free! http://www.ukmonster.co.uk/monster/s...35&postcount=3 __________________

12-08-2020, 11:13 AM	#9
boris More Tools! Join Date: Jun 2004 Location: Forres Bike: Multiple Monsters Posts: 295	Good info here too: https://ebcbrakes.com/articles/motorcycle-bed-in/ https://www.ferodoracing.com/product...s/pad-bedding/ __________________ Boris from Forres Last edited by boris; 12-08-2020 at 11:16 AM..

08-08-2020, 04:03 PM	#2
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	I had "fluctuation of brake effort" as an MOT advisory for a number of years but couldn't feel anything myself. I wasn't convinced they were warped but replaced them with some Brembo Goldlines nonetheless and I've had no MOT comments since. They are better quality and lighter than the OE Brembos but £285 per pair against the £480 of the OE discs (2½ years ago). Serie Oro, left - OE, right Try Simon at WSC Performance who gave me a really good deal. http://www.ukmonster.co.uk/monster/s...ad.php?t=56141 Before committing to replacements, I'd recommend you try Mr Gazza's "Italian Tune", which may improve things, if your discs aren't actually warped. http://www.ukmonster.co.uk/monster/s...35&postcount=3

08-08-2020, 04:08 PM	#3
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	PS if you do go for new discs, don't forget to match them to new pads, too. http://www.ukmonster.co.uk/monster/s...ad.php?t=58084

09-08-2020, 07:11 AM	#5
Rrawlings Member Join Date: May 2019 Location: Bradford Bike: M1100evo Posts: 175	My evo had a bit of a feeling like warped discs at slow speed so took the wheel off and spent a fair bit of time cleaning the bobbins and twisting them with a nut, bolt and some washers to get all the crud out. Put back and when tightening the callipers to the right torque apply pressure to the pads to centralise the callipers to the disc and since then no issues at all so might be worth a try for the sake of a couple of cans of the brake cleaner that screwfix sell at a decent price

11-08-2020, 04:45 AM	#6
Dingdong Dom Junior Member Join Date: Sep 2019 Location: Thundersley Bike: M1100evo Posts: 21	Thanks for the advice so far, here’s the thing, I had the discs straightened at motoliner in Maidstone, I returned the wheel with the discs on to be checked, when tested with a dial gauge they proved to be true, the guy at motoliner noticed that the wheel had no weights on it and balanced the wheel for me, I’ve tried cleaning the buttons on the discs and replaced the pads but it’s just the same? After the first straightening there was an improvement, there’s no pulsing in the lever just (as described by someone else) a nodding dog syndrome. I’m convinced it’s the disc's as there’s nothing when braking with the rear brake only. Thanks again for the advice.

11-08-2020, 05:42 PM	#7
crust rattles when he walks Join Date: Aug 2002 Location: in the comfy chair,moved furniture around Bike: M900 Posts: 1,065	Have you checked the steering head bearings?