• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Floating Irritation!

BiG DoM

BiG DoM

Husqvarna
AA Class
What is the reason for the rattling rear floating disc - have the spring washers rusted away, were never fitted, shyte quality (my bet)? What is the fix? Yes I normally wear earplugs but the cause not the symptom :mad:
 
Really??? The floating disc is there for better braking. It allows the disc to expand & contract with out warping the rotor. So I'll take the pro's over the con's. I never hear mine, just the pretty growl of my 610 through the big Ti Leo...... Not really a big problem IMO.
 
I've heard someone say they used rubber O rings on the washers of the floating disc to stop the rattle... Might work? My Leo X3 drowns out everything! I hardly hear the hum of the Michelin AC 10 (great dirt tire by the way) on the road, never mind the disc rattling.
 
I used to drive a drag race car and I remember when guys were experimenting with mufflers instead of open headers. Nearly every time after the first pass with a muffler they would think their car was falling apart and the engine was about to blow because they had never heard 4 link heim joints pop and creak plus gear noise, valve lash, piston slap when cold and the aluminum interior rattle. I guess my point is racing machines make nasty noises, which I happen to like but if they bug you there is always Cadillac Sedan DeVilles and touring bikes like the Gold Wing.
 
OK so I know the logic of floating disks and it allows the disc to expand when hot and not warp etc. All the clever dick replies here aside - I am not too worried about a little 'rattle and hum' more wondering whether the bushes are worn and whether this is a common issue. My HP2 also has floating discs but as I understand they have a spring type spacer/washer that expands and compresses with the disc. Anyway will have a look sometime and keep reminding myself that this is an Italian bike.
 
fwiw my rear disc is the same and it freaked me out at first as i've never seen a disc 'float' so much! no worries though and i'd say it's normal. just make sure the bolts are tight
 
BiG DoM said:
OK so I know the logic of floating disks and it allows the disc to expand when hot and not warp etc. All the clever dick replies here aside - I am not too worried about a little 'rattle and hum' more wondering whether the bushes are worn and whether this is a common issue. My HP2 also has floating discs but as I understand they have a spring type spacer/washer that expands and compresses with the disc. Anyway will have a look sometime and keep reminding myself that this is an Italian bike.
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Side to side movement is ok and the springs only serve to make it quieter. You could leave the springs washers off and in would have no affect on function. If there is excessive rotational movement then the bushings could be worn. If you can lock up the brake at a stand still and roll the bike forward and backwards quite a bit then look at the bushings closely, if they are visibly notched with wear then replace them. I have also seen the bolts that hold the bushings in place get a worn shoulder and allow play. I replaced bolts and bushings on the front of my trials bike recently because I could roll the bike almost 3/4 inch back and forth (less then 1/4" is normal) with the brake locked up which made it feel sloppy when I was trying to balance at a stand still.
 
The reason I suggested to check your rotor to see if it is bent was not intended as a "clever dick reply". Worn bushings and/or if your rotor is bent, makes the rotor rattle back and forth as the pads try to keep it centered. More than about .010" of runout could contribute to rattling.
The older style (2000) non floating rotors can be fitted to the later hubs like yours.
 
Try removing the disk hardware and reinstalling it with some clear silicone. Allow the silicone to "skin" a bit before tightening everything back up. It may help quiet the disk rattle.
 
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