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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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 Posted: Thu Oct 21, 2010 4:42 pm Post subject: Which Calipers/discs are interchangeable?(Set mine alight) |
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Hello again, I have a K1100LT (bit of a tale this, please bear with me.)
& I was out for a nice ride today with a couple of guys from a local forum when the area around my rear caliper caught fire. Luckily I put it out with a can of pop(soda) I'd previously spotted in one of my companions tail pack mesh pockets.
I just broke the ring pull seal slightly & extinguished the fire quickly. Unfortunately the shaft drive rear gaiter is fried & a few other bits & bobs were abit charred.
I'd recently changed pads & flattened my disc rotor by hand  & everything seemed ok, & even after the fire the brake although extremely spongy now, it is not binding & does slightly work.
What I reckon has happened is that while I was trying to bed in the new pads & freshly DIY "skimmed" disc (it was binding a little.)that there has been an hydraulic leak & it's sprayed the highly flammable brake fluid onto the hot disc. The gaitors on the caliper pistons are totally free of any fire damage so the leak must've been at the banjo bolt or pipe itself.
Anyway to cut to the chase...... I've decided to replace the caliper, hose, disc, pads & of course gaiter.
What I would like to know is which discs, calipers are compatible with mine. Mine is a 1993 K1100LT, it is an ABS model but it is no longer connected,(Disconnected before I got it.)
Could I fit a non ABS rear disc ?(don't need the ABS ring)would one fit off a K100/75 ?
It's just that there are plenty about but usually from different models.
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Thu Oct 21, 2010 7:22 pm Post subject: |
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K75 and K100 rotor, caliper and cylinder will fit.
Even without brake fluid the disc will get hot enough to light the boot on fire. If your rear brake is ever binding at all then it's time to stop.
I had an idiot test riding my K100RS4V (when I was selling it) when the rear brake locked on him and he kept riding until the boot caught on fire. (I'd over adjusted the rear brake lever and the MC piston caught on the set screw.)
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Thu Oct 21, 2010 8:21 pm Post subject: |
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| Flying Duck wrote: | K75 and K100 rotor, caliper and cylinder will fit.
Even without brake fluid the disc will get hot enough to light the boot on fire. If your rear brake is ever binding at all then it's time to stop.
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Good to know about the discs/rotors, so it's ok to fit a non ABS one then, I was just wondering if the mounting was thicker or something.
So any 75/100 rear disc should fit an old K1100LT then ?
If I can't find a used one any recommendation to the best aftermarket new ones, is it worth fitting an EBC floating one ?
What are the best pads ? I was using Ferodos at the time.
The binding brake I just allowed because with new pads & a recon disc I thought it'd "bed in".(shows what I know.) The rear wheel is lovely & free now but the boot/gaiter is fried & the brake is really spongy.(which it wasn't before the fire.)
Finally guys, I've been given an unopened litre of quality Dot5 brake fluid, is this ok for my back brake, I presumed aslong as it was at least Dot4 it's ok ?
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Thu Oct 21, 2010 8:35 pm Post subject: |
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Dot 5 is a no-no in our bikes. It will ruin the brake lines. Stick with Dot 4.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Thu Oct 21, 2010 8:37 pm Post subject: |
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| Flying Duck wrote: | | Dot 5 is a no-no in our bikes. It will ruin the brake lines. Stick with Dot 4. |
That's a bummer ! Thought I'd caught a break ! (excuse the bad pun !)
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Thu Oct 21, 2010 9:25 pm Post subject: |
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For the BMW used rotors make sure you ask the sellers what the thickness is.
On the EBC rotor get the EBC part number from the seller and verify compatibility for yourself before buying. (Although the bolt pattern does look like it's the correct one.)
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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granth
Mad Brick Rider
Joined: 04 Aug 2010
Posts: 78
Location: Birmingham,England
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| Posted: Sat Oct 23, 2010 5:34 pm Post subject: |
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Finally guys, I've been given an unopened litre of quality Dot5 brake fluid, is this ok for my back brake, I presumed aslong as it was at least Dot4 it's ok ?[/quote]
Like FD said Dot 5 Brake fluid is a very different type of fluid and will ruin all your seals,very quickly and will result in a large repair bill so do not even think of using it.
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1993(94 MODEL) K1100RS IN ASTRAL BLUE
2006 URAL 750CC DALESMAN SIDECAR OUTFIT,
RED AND CREAM. |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Sun Oct 24, 2010 4:51 pm Post subject: |
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Thanks for the advice so far ,it has been very helpful, Ta.
The EBC (on Ebay)does look good value for a (normally) highly regarded company.
Has anyone had experience of these discs/rotors?
Unlike my standard K1100LT disc/rotor, the replacement EBC one appears to be a pre-drilled floating disc/rotor,
which to me seem like good features.
(I remember the old drilled K discs/rotors used to crack though!)
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"A computer once beat me at chess, but it was no match for me at kick boxing."
Last edited by laverda on Wed Oct 27, 2010 2:24 pm; edited 1 time in total |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Mon Oct 25, 2010 12:31 pm Post subject: |
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An update, I've ordered the EBC disc/rotor from Wemoto.
They list the price on their website as just shy of £200 & even "cheaper" sites I tracked down don't go much below £170.
I managed to get it from their Ebay shop for £110 (Plus just £2.50 P&P, with immediate despatch!)
They say it's the exact one as in the picture,(so it's floating. ) & I asked them (even though they've assured me it is the correct one for my bike.)that if it doesn't fit can I return it in exchange for another one,(or refund) & they said "absolutely no problem."
So IMHO I can't go wrong with this deal .
All I need now is a caliper,(used). new pads,(probably EBC.)
& a new flexi brake hose.(The ABS has been disconnected & by-passed years back.)
Oh & some DOT4 brake fluid. 
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Wed Oct 27, 2010 2:24 pm Post subject: |
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My EBC Pro-Lite floating rear disc/rotor arrived today, & it looks like a good bit of kit,
It looks the right one, gonna whip off the old one tomorrow & put it on.
Seems a bargain for the price of £110 (£2.50 P&P)
The actual disc/rotor.
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Wed Oct 27, 2010 10:19 pm Post subject: |
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Hello again,
Now this might seem like a dumb question, & tbh it almost certainly is but :
Is there any reason to fit the ABS ring to my new disc/rotor ?
My ABS has been disconnected completely for years & I have absolutely no intention of reconnecting it.
I just wanted to make sure the ring didn't perform any other tasks ? e.g.Balancing etc.....
& if it is ok (& of course abit less usless unsprung weight.)would it also be ok to remove the ABS ring off my front disc/rotor aswell?
I apologise in advance for my potentially dumb question !
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Wed Oct 27, 2010 10:24 pm Post subject: |
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There are no dumb questions, just dumb people.
Just kidding.
No, the ring serves no other purpose than to make the ABS sensor pulse so there's no need for you to install it.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Wed Oct 27, 2010 10:35 pm Post subject: |
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| Flying Duck wrote: | There are no dumb questions, just dumb people.
Just kidding.
No, the ring serves no other purpose than to make the ABS sensor pulse so there's no need for you to install it. |
Good, just been a tad paranoid since the rather spectacular demise of my back brake......
It's the only bike I've had in 30 years of biking with (potential)ABS so thought it best to ask.
ABS may well be a life safer in the right circumstances but tbh I've never had it, (& if it's as unreliable as I've heard) I reckon the slightly heightened feeling of safety coupled with the potential for ABS failure would be more disastrous than not having in at all.
Well that's IMHO, but we have established that I am dumb.
Thanks again.
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Thu Oct 28, 2010 12:54 am Post subject: |
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The ABS doesn't fail in an emergency braking situation, at least not that I've ever heard of. When it goes bad it usually fails to initialize - and it tells you so. When it goes out it tells you with flashing lights and then you're just left with normal brakes so the failure of the ABS (aside from the $$$ to fix it) isn't that big of a deal.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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hockeyshifter
Flying Brick Rider
Joined: 01 Jan 2006
Posts: 177
Location: harpers ferry WVa.
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| Posted: Sun Oct 31, 2010 2:50 pm Post subject: |
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Why dont you just rebuild the caliper.. the major part on the system is the core an the piston everything else is rubber.. just hone and polish install new seals and gaskets reassemble with brake fluid dot 4.. it easy than you think. you will need to use compressed air about 5 kpa to blow the pistons out of the bores.. its real easy..
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fix the problem not the blame ; fix what is messed up ; NO one is to blame. |
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laverda
Mad Brick Rider
Joined: 02 Feb 2010
Posts: 90
Location: Scotland
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| Posted: Wed Nov 10, 2010 11:02 pm Post subject: |
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| hockeyshifter wrote: | | Why dont you just rebuild the caliper.. the major part on the system is the core an the piston everything else is rubber.. just hone and polish install new seals and gaskets reassemble with brake fluid dot 4.. it easy than you think. you will need to use compressed air about 5 kpa to blow the pistons out of the bores.. its real easy.. |
My original caliper was on fire so didn't really fancy working on it as I don't know the extent of the damage.
I've got a replacement caliper now,(actually got two, from working bikes for a very good price.)
Also got some new Carbone Lorraine brake pads for a tenner !!!
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"A computer once beat me at chess, but it was no match for me at kick boxing." |
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