BMW K bikes (Bricks)

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1Back to top Go down   Brembo pads Empty Brembo pads Sun Sep 12, 2021 4:38 am

brickrider2

brickrider2
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My new-to-me airhead shares the front brake set up with my K1100LT, but the performance of the former is way different.  The R100R brakes seem very grabby.  Should I go with OEM or are there after market pads that have a more progressive feel to them? I'd appreciate suggestions and the experience of others who have the four-pot Brembo set up on their machines.



Last edited by brickrider2 on Sun Sep 12, 2021 3:34 pm; edited 1 time in total


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1996 K1100LT
    

2Back to top Go down   Brembo pads Empty Re: Brembo pads Sun Sep 12, 2021 2:23 pm

Laitch

Laitch
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@brickrider2 wrote:. . . the two-pot Brembo set up on their machines.
The front brakes on your R100R should be 4-pot calipers, like your K1100. For a reasonable brake performance comparison of your new acquisition to your road warrior, the rotors on the R need to be clean, the pads in good shape and not glazed, the pads needed to have been bedded in with reasonable care by the previous owner and the pads on both motos need to be of the same composition—organic, semi-organic or sintered.


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1995 K75 81,000 miles
Brembo pads Usa-lo10
    

3Back to top Go down   Brembo pads Empty Re: Brembo pads Sun Sep 12, 2021 3:37 pm

brickrider2

brickrider2
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Four-piston, corrected.  My bad.


__________________________________________________
1996 K1100LT
    

4Back to top Go down   Brembo pads Empty Re: Brembo pads Sun Sep 12, 2021 6:56 pm

Two Wheels Better

Two Wheels Better
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I am a fan of the UK brand EBC FA407HH (sintered, readily available) for the front of a K or later Airhead with four pot callipers. They don't 'dust' the wheel, seem to last well, are firm-feeling & progressive without being grabby, and, so far as my experience goes, do not tear up the disc surface. Out back I use EBC non-sintered because the two pot calliper & large disc is what I reckon to be too much brake area for the machine and there's no need for the additional 'power' of sintered. I have these HH pads in the front of both my R100 Mystic and any K bike with four pot Brembos. 

However, I fully recognise the brake pad pros & cons discussion can border on the frenzy of opinion of an oil thread.


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1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

5Back to top Go down   Brembo pads Empty Re: Brembo pads Mon Sep 13, 2021 1:39 pm

brickrider2

brickrider2
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"...so far as my experience goes...."
I'd not considered sintered pads due to their reputation for eating rotors.  Maybe that is a mistake on my part.  
How many miles have you put on those pads thus far?
What about carbon pads?  Are those suitable for street use?


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1996 K1100LT
    

6Back to top Go down   Brembo pads Empty Re: Brembo pads Mon Sep 13, 2021 2:03 pm

Dai

Dai
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I'm with TWB. EBC sintered on the front and non-sintered on the rear. Probably 25-30,000 miles per set, but if that sounds high it's because they would have traversed the same roads day in, day out and so the engine gets (got!) used as a brake quite a lot because I knew what was coming up.


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1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

7Back to top Go down   Brembo pads Empty Re: Brembo pads Mon Sep 13, 2021 3:13 pm

Two Wheels Better

Two Wheels Better
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Any new BM, Duke or Zero come with sintered pads these days. I pick the aforementioned moto brands because I haven't worked in an HD, Honda, S'zuki, Kwacka or Hyosung shop in a decade, but I see the tell-tale copper backing plates on those brand's current models. I see Bee Ems, Duc & Zero daily at work. We put OEM pads & EBC on customer BMW, & EBC exclusively on Ducati.

I have no experience with Carbon-Lorraine (sp?) Brand but carbon-kevlar is what EBC use in their non-sintered, base level 'organic' pads.

The back of the K1300GT currently has the red backing plate EBC pads, a step above non-sintered, a step below HH sintered, and they've got an honest 28,000 miles scraped off them with a still in-spec disc and no dusting. It was my first try with this type. I will use them again. The fronts are EBC sintered with 18,000+ and they've maybe 60% left. This bike gets hard touring and commuting use and has 83,000 miles on the clock.

EBC work for me.


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1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

8Back to top Go down   Brembo pads Empty Re: Brembo pads Mon Sep 13, 2021 6:45 pm

Point-Seven-five

Point-Seven-five
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Here's my experience:

I bought a K75RT in the Spring of 2014 with 54,000 miles. The brakes had sintered pads of unknown brand and the rotors were worn, but while still in spec, there was not much left.

I replaced the pads that came with it with organic Kevlar pads. Since then I have done 45,000 miles and the rotors show no additional wear, they are still in spec. I get about 30,000 miles from a set of pads that I get on eBay for $18 for all three calipers. Yes, they do make the wheels dusty, but the stopping power is acceptable to this old geezer, even in the mountains out west in wet weather. A shot of wheel cleaner every 3-4 weeks and a good rinse keeps the dust pretty much under control.


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Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

9Back to top Go down   Brembo pads Empty Re: Brembo pads Thu Sep 16, 2021 3:45 am

AL-58

AL-58
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@brickrider2 wrote:My new-to-me airhead shares the front brake set up with my K1100LT, but the performance of the former is way different.  The R100R brakes seem very grabby.  Should I go with OEM or are there after market pads that have a more progressive feel to them? I'd appreciate suggestions and the experience of others who have the four-pot Brembo set up on their machines.

There are variations other than the pads.

Earlier R100Rs have a single front disk(4 pot caliper), later R100R models have twin front disks(with 2 x 4 pot calipers). Each has their own different master cylinder (piston diameter) which gives a different hydraulic ratio, which gives a different feel to the brake lever.

The K1100 has a different master cyl piston diameter again, if memory serves me it's bigger again than either of the R100R master cyls. It moves more fluid but with less hydraulic "leverage", so it would not feel as sharp before you even consider pads.

Al


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'87 K100RS/HRD sidecar (1100 motor)  sc25 

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Brembo pads K-dogs10
    

10Back to top Go down   Brembo pads Empty Re: Brembo pads Thu Sep 16, 2021 3:32 pm

brickrider2

brickrider2
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That is one of the things that bugs me about my twin-caliper brakes.  To my sensibilities, there is too much travel at the lever before any braking takes place.  I'd like a m/c with a slightly larger bore. I think that would be a superior set up.  But, truth to tell, I'm still becoming familiar with the new airhead.  Maybe this old dog can learn some better braking techniques. 
In any case, it's quite the dramatic change riding the K1100LT, then the R100R.  I love 'em both!   cheers


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1996 K1100LT
    

11Back to top Go down   Brembo pads Empty Re: Brembo pads Thu Sep 16, 2021 9:17 pm

Two Wheels Better

Two Wheels Better
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Master cylinder bore diameter on a dual disc R100R is 15mm, single disc is 13mm, and K1100 is 20mm, with essentially the same callipers fitted between these models. My Airhead in OZ has four piston Brembos over 292mm Suzuki discs with a K11 M/C and the feeling is superb with good initial bite and a progressive feeling. Quality of material in the pads can have a lot to do with it.

*Later K1200RS/GT and K40 series K bikes use a 16mm M/C over dual, four piston callipers. My K100/K1200 Big Block uses a K11 20mm M/C with four piston Brembo R1200GS/GSA/RT-K1300GT/S/R callipers and 320mm x 5mm dual discs, and the bite is stoppie-like with a huge grab but with a controllable feel (EBC HH sintered) - definitely overkill for the bike's weight, but why not!? Stopping is as important as going.

The 2019 thru early '21 BMW R1250GS, GSA & RT were supplied with US made Hayes callipers. BMW had a weep issue with them and for a while last year they were replacing them, if fluid weepage between the calliper halves was evident, with the same brand. As of last Winter there's been a recall and the replacement is Brembo, as it should have been all along. Hayes, or Kelsey-Hayes, is a long-time and reputable manufacturer of brake components, but in this example - perhaps cost cutting or perhaps at a stretch, satisfying the previous administration with US content on imported vehicles - the quality was not there. After the swap and a proper bleed, nearly to a T, the rider will comment that the new brakes (both L & R callipers, new pads, & mounting hardware) seem to have a longer initial lever travel but better bite when braking hard. The cops on their R1250RT-P come back later with a smile after the swap.

As an aside to the recall story the Hayes calliper replacement on the sporty 2019 thru early '21 S1000RR is now Nissin callipers with a new master cylinder, from the previous Hayes combo, along with a software update.


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1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

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