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Author Topic: Loose Rear BRake Rotor  (Read 5667 times)

Offline jfox855

  • Curious
  • Posts: 4
Loose Rear BRake Rotor
« on: June 16, 2014, 11:54:10 AM »
I'm new to the forum and new to a 1995 K75 although I've owned some R bikes in the past. My rear brakes sometimes make a bad sound, so I know they need some work and haven't had time yet to address it,  but I've noticed the rear rotor is slightly loose with some some play side to side. Any ideas what's up? I want to know what to look for before I pull the caliber.
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Offline Zipster

  • ^ Proficient Motobricker
  • Posts: 203
Re: Loose Rear BRake Rotor
« Reply #1 on: June 16, 2014, 12:33:03 PM »
Hi and welcome. Are you referring to more play than normal for floating discs?
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  • Northern Ireland
  • 1996 K1100 LT SE - sold with 104,500 miles in 2015; 2001 R1150RT - 68,000 miles; 2013 Triumph Trophy SE - 50,000 miles; 2007 Harley Ultra Classic - 50,000 miles (Canada bike for stateside use only)
Add life to your days, not days to your life!

Offline jfox855

  • Curious
  • Posts: 4
Re: Loose Rear BRake Rotor
« Reply #2 on: June 16, 2014, 12:43:50 PM »
Thanks for the help. I'm not sure whats "normal" float for the rear-I know the front has no play.
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Offline rbm

  • ^ Quintessential Motobricker
  • Posts: 2308
Re: Loose Rear BRake Rotor
« Reply #3 on: June 16, 2014, 01:28:36 PM »
K75 rear disk should not have play.  It's not floating.  There are two screws that secure the rotor to the final drive hub.  They serve only to fix the disk in place.  The real securing of the rotor happens when the rear wheel is fastened.

If the rotor has play, it may be a problem with the rivets.
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  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline johnny

  • TrailBrakingThrottleWhacker
  • ^ Quintessential Motobricker
  • Posts: 7652
  • Whacking...n...Chopping Sliding...n...High Siding
Re: Loose Rear BRake Rotor
« Reply #4 on: June 16, 2014, 03:29:12 PM »
i caint see how those 2 whack countersunk screws with that kraut thread locker on them can come loose...

im calling final drive failure imminent...

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

Offline rbm

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Re: Loose Rear BRake Rotor
« Reply #5 on: June 16, 2014, 03:37:13 PM »
Johnny, if it's FD then he'd see major wheel play as well, right?  Handling would be wonky, wouldn't it?
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  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline johnny

  • TrailBrakingThrottleWhacker
  • ^ Quintessential Motobricker
  • Posts: 7652
  • Whacking...n...Chopping Sliding...n...High Siding
Re: Loose Rear BRake Rotor
« Reply #6 on: June 16, 2014, 03:51:18 PM »
im wondering what he is calling slightly loose... a short cellphone video would be nice...

i saw a guy say his rotor was loose... he had the rear wheel off and was rotating it forward and backward about 2 inches... see what i mean... theres some whack going on out there...

there will be a tiny bit of play left to right in the early stages of final drive failure... i of course have never heeded the warning and simply rode it till i couldnt hang onto it any longer... i have been whacking the throttle 2up for all 3 of my final drive failures... its a character builder...

need more info...

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

Offline Inge K.

  • ^ Quintessential Motobricker
  • Posts: 1451
Re: Loose Rear BRake Rotor
« Reply #7 on: June 16, 2014, 06:11:01 PM »
It could also be non OEM floating disc.
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Offline racinrich

  • ^ Proficient Motobricker
  • Posts: 296
Re: Loose Rear BRake Rotor
« Reply #8 on: June 18, 2014, 10:39:25 PM »
what is the customer concern ,low brake pedal , long travel to brake engagement , pedal pulsing  , rattling that goes away when braking ,wobble while turning , or you were just touching stuff and thought hmm
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1993 k1100 lt silk blue
des plaines ill
USA

Offline K75RT Keith

  • ^ Proficient Motobricker
  • Posts: 447
Re: Loose Rear BRake Rotor
« Reply #9 on: June 19, 2014, 09:15:06 AM »
Just for giggles, I'll ask the stupid question.  Are the lugs and teh rotor mounting screws tight on the rear wheel?
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You can't help someone who doesn't want to hear the answer.

1990 K75RT
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