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NORMAL? Play on Brembo disks?

Started by pespina, April 12, 2009, 07:13:53 AM

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pespina

April 12, 2009, 07:13:53 AM
I noticed that one of 320 mm Brembo front disks (Ducati OEM 492.4.024.1A) has a very slight play between the bronze mounting plate and the disk itself. The play is just in the rotational direction (no play in the axial nor radial directions). I checked the retaining rivets and they appear to be normal (no sings of fatigue life or impact damage).

As the other disk has not such play and I would like to know if such play would be considered normal or is this an indication of failure.

Kind regards, Pedro
2003 Monster 620S i.e. (sold)
2008 Hypermotard 1100

ducpainter

#1
April 12, 2009, 07:58:24 AM
Play in the rotational direction is an indication of a problem.

"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Norm

#2
April 13, 2009, 07:58:36 AM
Wear. I wouldn't worry about a small amount, but keep an eye on it and shop some nice used ones off Ebay.

pespina

#3
April 14, 2009, 06:33:20 AM
I want to thank Norm and ducpainter for their responses (and for the very insightful off-line conversation with ducpainter).

I took the bike to my local mechanic and he said that that amount of small play is not unusual and that it is to be viewed as normal. Just for future reference!
2003 Monster 620S i.e. (sold)
2008 Hypermotard 1100

ducpainter

#4
April 14, 2009, 07:32:56 AM
Quote from: pespina on April 14, 2009, 06:33:20 AM
I want to thank Norm and ducpainter for their responses (and for the very insightful off-line conversation with ducpainter).

I took the bike to my local mechanic and he said that that amount of small play is not unusual and that it is to be viewed as normal. Just for future reference!
have fun at the track... ;D
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


corndog67

#5
April 14, 2009, 10:11:13 PM
I had a Triumph 955 Daytona, which had basically copies of Brembo full floating discs, at about 55,000 miles, the pins that held the outer disc to the carrier were pretty wore, when you weren't on the brakes, the bike made a slight "ching-ching-ching" sound coming down the road.  I put it off for as long as I could, but eventually, I got nervous and replaced them.   No more noise. 
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