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checking disk run-out

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Sid_The_Sloth
Trackday Trickster



Joined: 27 Nov 2011
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PostPosted: 23:44 - 30 Jul 2014    Post subject: checking disk run-out Reply with quote
My MOT for the Fazer is up soon, the front disks are pretty worn and need replacing. I've also noticed that at low speed with light braking I can feel the front end sort of bouncing on the suspension, as if the brakes are grabbing and letting go. So I'm assuming slightly warped disks.

I'm going to see a doner bike tomorrow, is there any way I can check the run-out without a gauge? Guessing it'd just be to roll the wheel when off the ground to see if it only rubs in 1 spot? Is there a more accurate way?
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2013 Honda Shadow VT750C2B Black Spirit, 1994 CBR600 f2
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TUG
World Chat Champion



Joined: 12 May 2007
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PostPosted: 01:33 - 31 Jul 2014    Post subject: Re: checking disk run-out Reply with quote
Sid_The_Sloth wrote:
My MOT for the Fazer is up soon, the front disks are pretty worn and need replacing. I've also noticed that at low speed with light braking I can feel the front end sort of bouncing on the suspension, as if the brakes are grabbing and letting go. So I'm assuming slightly warped disks.

I'm going to see a doner bike tomorrow, is there any way I can check the run-out without a gauge? Guessing it'd just be to roll the wheel when off the ground to see if it only rubs in 1 spot? Is there a more accurate way?

Gauge or tap and a toothpick will help your judgement. Thumbs Up
Tape the toothpick to the fork leg and spin the wheel that's the best you can do.
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Fizzer Thou
World Chat Champion



Joined: 06 Aug 2011
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PostPosted: 08:25 - 31 Jul 2014    Post subject: Reply with quote
A cheaper/easier way is to take along a black white board marker pen. Draw a wavey mark around the swept area of each disc and roll the bike forwards a full rotation of the wheel.If any part of the wavey line is not removed,it shows the disc is warped.
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TUG
World Chat Champion



Joined: 12 May 2007
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PostPosted: 08:31 - 31 Jul 2014    Post subject: Reply with quote
Fizzer Thou wrote:
A cheaper/easier way is to take along a black white board marker pen. Draw a wavey mark around the swept area of each disc and roll the bike forwards a full rotation of the wheel.If any part of the wavey line is not removed,it shows the disc is warped.

Ahhh sweet, thanks for the tip!
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Old Thread Alert!

The last post was made 11 years, 153 days ago. Instead of replying here, would creating a new thread be more useful?
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