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Author Topic: WTB 92 K75 Front Rotors  (Read 9315 times)

Offline Ray Charles

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WTB 92 K75 Front Rotors
« on: October 19, 2019, 04:44:45 PM »
My new to me 92 K75RT came with very worn front rotors.  The rear will stop the bike but I don't trust it when I need to use brakes. If you have any used front rotors you're willing to part with , I'd appreciate getting them.  Please message me.  Thanks.  Ray
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline johnny

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Re: WTB 92 K75 Front Rotors
« Reply #1 on: October 19, 2019, 06:18:40 PM »
greetings...

its not the rotors...

i wept because i had no rotors until i met a man who had no hydromechanical fluid pressurization modulator...

j o
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  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline E30_Crazy

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Re: WTB 92 K75 Front Rotors
« Reply #2 on: October 19, 2019, 10:52:46 PM »
Quote from: johnny on October 19, 2019, 06:18:40 PM
greetings...

its not the rotors...

j o

Gotta be the stators, or the hydromechanical fluid pressurization modulator.
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  • Newport News, Virginia
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Offline Laitch

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Re: WTB 92 K75 Front Rotors
« Reply #3 on: October 20, 2019, 06:51:42 AM »
Quote from: Ray Charles on October 19, 2019, 04:44:45 PM
My new to me 92 K75RT came with very worn front rotors.
What are their thickness and runout measurements?
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #4 on: October 23, 2019, 10:46:48 AM »
I'll try to measure the thickness and runout when it's not raining later this week.  Thanks for the responses guys.  I didn't even know it had ABS brakes.  According to the Real OEM.com site, my K75 was manufactured in 11/89. Does that sound plausible for a 1992?  Ray
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline Laitch

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Re: WTB 92 K75 Front Rotors
« Reply #5 on: October 23, 2019, 12:31:26 PM »
Quote from: Ray Charles on October 23, 2019, 10:46:48 AM
According to the Real OEM.com site, my K75 was manufactured in 11/89. Does that sound plausible for a 1992?  Ray
There's a response to that in your VIN Whack thread. Try not to ask the same question in two different places.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline johnny

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Re: WTB 92 K75 Front Rotors
« Reply #6 on: October 23, 2019, 01:07:18 PM »
greetings...

id getts the vin off the frame... then make sure the title registration insurance match the frame...

what the frame says is what it is supposed to be... butts with the talent around here could be anything at this point...

j o
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  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline Chaos

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Re: WTB 92 K75 Front Rotors
« Reply #7 on: October 23, 2019, 02:40:30 PM »
Worn rotors should work pretty well until they do this.....
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Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #8 on: October 23, 2019, 06:38:25 PM »
My rotors are scored.  Some spots deeper than the picture. 
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #9 on: October 23, 2019, 06:44:48 PM »
Quote from: Laitch on October 23, 2019, 12:31:26 PM
There's a response to that in your VIN Whack thread. Try not to ask the same question in two different places.

Thanks Laitch. I'm still trying to figure out how to post. And where to post. 
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline johnny

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Re: WTB 92 K75 Front Rotors
« Reply #10 on: October 23, 2019, 06:46:25 PM »
greetings...

yes of course... butts id they cracked...

j o
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  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline Laitch

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Re: WTB 92 K75 Front Rotors
« Reply #11 on: October 23, 2019, 08:05:16 PM »
Quote from: Ray Charles on October 23, 2019, 06:44:48 PM
I'm still trying to figure out how to post. And where to post.
You must be all worn out. Take a nap.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #12 on: October 24, 2019, 08:15:42 AM »
Quote from: johnny on October 23, 2019, 06:46:25 PM
greetings...

yes of course... butts id they cracked...

j o

Mine don't appear to be cracked. And the scoring doesn't appear to be as bad as I first thought when the rotors were rusty. I've ridden on worse.
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #13 on: October 24, 2019, 08:39:51 AM »
Quote from: Laitch on October 23, 2019, 08:05:16 PM
You must be all worn out. Take a nap.

I like your style Laitch. Get beauty sleep when you can grab it,right? :-)
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline beemuker

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Re: WTB 92 K75 Front Rotors
« Reply #14 on: October 24, 2019, 09:09:32 AM »
I had surging brakes and found a used set on fleabay. solved the surge. I still have the old set, they are within spec but one is slightly warped which was causing the surge. there are several on ebay.
https://www.ebay.com/itm/86-95-BMW-K75-FRONT-BRAKE-ROTOR-LEFT-RIGHT-DISC-ABS-84-91-K100-LT-RS-RT/312773406878?hash=item48d2bf709e:g:u4UAAOSwFE5dgmBi
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  • Panama City, FL
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Offline Laitch

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Re: WTB 92 K75 Front Rotors
« Reply #15 on: October 24, 2019, 09:15:17 AM »
Quote from: Ray Charles on October 24, 2019, 08:39:51 AM
Get beauty sleep when you can grab it,right? :-)
Consider it intellectually restorative sleep. Considered in that way, a mirror won't disappoint you.
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  • Along the Ridley in Vermont.
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Offline Martin

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Re: WTB 92 K75 Front Rotors
« Reply #16 on: October 24, 2019, 04:47:12 PM »
Slight warping can be cured see link.http://www.motobrick.com/index.php/topic,1062.msg96334.html#msg96334
Regards Martin.
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  • North Lakes Queensland Australia
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Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #17 on: October 26, 2019, 10:37:44 AM »
Quote from: Laitch on October 24, 2019, 09:15:17 AM
Consider it intellectually restorative sleep. Considered in that way, a mirror won't disappoint you.

A gift from the truly wise.  Best free advice I've ever been given.  I will never say beauty sleep again.  I will however freely employ "intellectually restorative sleep" in my lexicon.  Thanks.  :-)
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline Laitch

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Re: WTB 92 K75 Front Rotors
« Reply #18 on: October 26, 2019, 11:18:11 AM »
Quote from: Ray Charles on October 26, 2019, 10:37:44 AM
Best free advice I've ever been given.
Cheer up. Your life could get better than this. :-)
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #19 on: October 27, 2019, 09:56:45 AM »
Quote from: Laitch on October 26, 2019, 11:18:11 AM
Cheer up. Your life could get better than this. :-)

Another pearl of wisdom, Sometimes I think it could get better. Sometimes I think it couldn't. I still think it will. :-)
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  • StevensPoint Wisconsin USA
  • 1992 K75RT

Offline Laitch

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Re: WTB 92 K75 Front Rotors
« Reply #20 on: October 27, 2019, 01:24:12 PM »
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Ray Charles

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Re: WTB 92 K75 Front Rotors
« Reply #21 on: November 01, 2019, 11:51:19 AM »
Quote from: Laitch on October 20, 2019, 06:51:42 AM
What are their thickness and runout measurements?

The thickness is 4.9 mm and 4.8 mm. Runout is minimal. No warpage. No drag as I spin the wheel. 

Thanks for helping me with this learning opportunity.  Now I can get out and ride before theres snow and slush and ice.  Oh My.

Dont need good used rotors right now but I'll keep my eyes open for some for when I do need them. 

Now for an intellectually restorative nap.  Ray
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  • StevensPoint Wisconsin USA
  • 1992 K75RT
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