BMW K bikes (Bricks)

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1Back to top Go down   larger rear brake disc Empty larger rear brake disc Tue Sep 21, 2021 8:49 pm

arbalest

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I am working out the details of this arrangement. So, the rear disc will now be the front disc. Is there any such thing as a larger brake disc, or how would I modify a larger disc to fit the final drive?

    

2Back to top Go down   larger rear brake disc Empty Re: larger rear brake disc Tue Sep 21, 2021 10:35 pm

92KK 84WW Olaf

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Might be an idea to mention the bike...


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   larger rear brake disc Empty larger disc Wed Sep 22, 2021 10:39 pm

arbalest

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@92KK 84WW Olaf wrote:Might be an idea to mention the bike...
I want to use a K100 swingarm and final drive (with pinion removed) as the swingarm on a leading link fork.

    

4Back to top Go down   larger rear brake disc Empty Re: larger rear brake disc Wed Sep 29, 2021 8:59 pm

K75cster

K75cster
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Sounds like you like to fudge things a bit. you could try using a four piston brake unit on the stock disc for alittle more pressure and stopping power but you have to go to an equivalent master to match that. Going up in size means shifting the calliper up closer to the wheel, that limitation would set you with perhaps little more than a K1100 front disc and calliper. You have to strip the rear disc housing and machine the front K1100 housing to go in place of the old K100 disc on that old housing. Stock mono was 285 and the K1100 front is 305 it may fit.

Just edited that disc size to what it should be, Taa TWB



Last edited by K75cster on Thu Sep 30, 2021 3:39 am; edited 1 time in total


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

5Back to top Go down   larger rear brake disc Empty Re: larger rear brake disc Wed Sep 29, 2021 10:12 pm

92KK 84WW Olaf

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@arbalest wrote:
@92KK 84WW Olaf wrote:Might be an idea to mention the bike...
I want to use a K100 swingarm and final drive (with pinion removed) as the swingarm on a leading link fork.
Been thinking about this. A lot more stresses on that mounting stud up front ......assuming you mean using a Monolever and not a Paralever.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

6Back to top Go down   larger rear brake disc Empty Re: larger rear brake disc Wed Sep 29, 2021 10:36 pm

Two Wheels Better

Two Wheels Better
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K1100 front discs are 305mm.


__________________________________________________

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
    

7Back to top Go down   larger rear brake disc Empty Re: larger rear brake disc Thu Sep 30, 2021 1:06 pm

gorio

gorio
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Is the bigger disk to capture some sort of look?
Once the weight transfer happens and you can start some serious front braking the back brake doesn't really need to be very powerful to lock the wheel. If you can lock the wheel why add more braking?


__________________________________________________
1992 K100rs 16v
1997 R1100rt
2006 R1200rt
Past lives
Kawasaki Concours
1976 BMW R90s
1975 Ducati 860gt
1992 Honda VFR750
1985 Honda VF750
1982 Kawasaki 750GPZ
1975 Norton 850 Commando
    

8Back to top Go down   larger rear brake disc Empty K final drive larger brake disc Thu Sep 30, 2021 5:50 pm

arbalest

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@gorio wrote:Is the bigger disk to capture some sort of look?
Once the weight transfer happens and you can start some serious front braking the back brake doesn't really need to be very powerful to lock the wheel. If you can lock the wheel why add more braking?
Per previous posts here, the final drive (along with the swingarm) would be used as the swingarm on a leading link front end. The point of the larger disc is to get more swept braking surface, with 4 or 6 pot calipers to get some serious braking for my sidecar rig.

    

9Back to top Go down   larger rear brake disc Empty Re: larger rear brake disc Thu Sep 30, 2021 6:12 pm

gorio

gorio
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@arbalest wrote:
Per previous posts here, the final drive (along with the swingarm) would be used as the swingarm on a leading link front end. The point of the larger disc is to get more swept braking surface, with 4 or 6 pot calipers to get some serious braking for my sidecar rig.
guessing I should have read more carefully.


__________________________________________________
1992 K100rs 16v
1997 R1100rt
2006 R1200rt
Past lives
Kawasaki Concours
1976 BMW R90s
1975 Ducati 860gt
1992 Honda VFR750
1985 Honda VF750
1982 Kawasaki 750GPZ
1975 Norton 850 Commando
    

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