Front rotor. I need schoolin'.


6 replies to this topic
  • wizbangdoodle

Posted April 27, 2015 - 07:00 AM

#1

This is the front rotor on my 2012 wr450. Please tell me the purpose of having it separated from the hub.
When I was messing with my bike I noticed, when holding the front brake and rocking the bike, a little play.
When looking closer, it is from these floating rings that hold the rotor to the hub.

Attached Thumbnails

  • ImageUploadedByThumper Talk1430146524.359455.jpg


  • bikedude987

Posted April 27, 2015 - 07:21 AM

#2

when the rotor heats up, it expands.  This allows the rotor to absorb more heat without warping.



  • wizbangdoodle

Posted April 27, 2015 - 08:16 AM

#3

That makes sense. Why isn't the rear rotor the same? Not enough heat?

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  • GuyGraham

Posted April 27, 2015 - 09:09 AM

#4

Its called a 'floating' disc

as said above it allows expansion with warping

It also has side to side movement so you get better alignment with the caliper

 

Its more of a sports bike thing where braking from high speed can turn the discs blue (300°C +) - its a bit OTT on a dirt bike



  • Krannie McKranface

Posted April 27, 2015 - 12:46 PM

#5

It's so when you tap the brakes lightly, you think your steering head is loose, and it drives you crazy until you realize they are floating discs.



  • wizbangdoodle

Posted April 27, 2015 - 03:10 PM

#6

It's so when you tap the brakes lightly, you think your steering head is loose, and it drives you crazy until you realize they are floating discs.


This is what I thought was happening at first. I thought my bearings were shot or something.

  • ThumpMe

Posted April 28, 2015 - 05:28 AM

#7

It's so when you tap the brakes lightly, you think your steering head is loose, and it drives you crazy until you realize they are floating discs.

 

 Been there done that....... and +1 on it driving you crazy!






 
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