Opinions please

[Battersea]

Had a reply from Shaws, Techs have looked at the vid and say absolutely normal for floating discs.

Only had floaters on two other bikes, my last Fatboy (Ferodo parts) and a Trumph Rocket III. Thinking back they had more of a 'click' than a 'clonk' though .

To be honest this only occurs after I’ve had to hold the bike from rolling back at an uphill stop. The floating disc rotor moves in opposite rotation to normal and shifts against the other side of the rivets. Hence the first time the brake is applied going forward –' clonk'.

[Halal Tim]

That is excessive play.
I had it on the glide. Changed the little bushes and it was much better. You dont get that excess on jap bikes.

[badgerbill]

As per the last post, that is excessive. The buttons on the floating discs are there to compensate for the different coefficients of expansion of the disc and the mounting plate on the hub. There should be slight sideways play, but not radial as seen in the video. I've examined 'lots' of motorcycle brake discs in the course of my job over the past 14 years, and only ever found one with wear as seen in the video.

[rocking rooster]

For years I've been running aftermarket floaters on my Heritage and replaced one when it was a bit loose, but nowhere as bad as yours. The replacement has done 40K miles and has a minute amount of lateral movement (which is the point of a floating disk). My Lowrider has Harley's oem floaters and again there is no fore and aft play at all.
Basically your bobbins are knackered!

[Battersea]

That is excessive play.
I had it on the glide. Changed the little bushes and it was much better. You dont get that excess on jap bikes.

Where did you get the 'bushes' from Tim? Mine are riveted.

[Halal Tim]

Where did you get the 'bushes' from Tim? Mine are riveted.

The glide discs arent floaters, but sit on tubular metal bushes. These compact over time, so thereby making the disc go back and forth like yours. I had to change them at 20k, due to excessive clunk. Cost about 12 quid to do both front discs.

[Battersea]

Are you at the LLangollen this weekend Tim?

[Halal Tim]

Yes mate. Be there about 4pm friday.
If you find mike and dave, i will be with them.