Wird scary sound from rear wheel

[keand3]

Hi guys.

Went for å drive today, and at the end of my trip i noticed some weird sounds coming from the back.

Got home,  put the bike on the center stand and turned the rear wheel around. I can't describe the sound so i recorded a video.
I don't dare drive until i know what it is.
Check the video:
https://youtu.be/nEEMLJ7pGxY

[rktmanfj]

Probably wheel (or cush drive) bearing.

Grab the wheel and/or sprocket and see how much play you have in it.

[FJmonkey]

Ken, make sure your rear brakes are not dragging and not down to metal. Your chain looks lubed. Are there any places that you can see rubbing that would cause that sound? Chain guard, some piece of crap picked up on your last ride. Bearings normally make a grinding noise when they fail but it could be a bad bearing. If you don't see any external cause then I would take the wheel off and check for internal causes. See if you can narrow down where the noise is coming from with a poor mechanics stethoscope. A short piece of garden hose held up to your ear, move the other end around to different parts of the rear wheel while it is making that noise. When the noise heard from inside the hose is the loudest, then the end of the hose is closest to the source.

[keand3]

Probably wheel (or cush drive) bearing.

Grab the wheel and/or sprocket and see how much play you have in it.

Hmm... I will check and se if theres any play, but they should be torqued down so ther shoulden't be any...

Ken, make sure your rear brakes are not dragging and not down to metal. Your chain looks lubed. Are there any places that you can see rubbing that would cause that sound? Chain guard, some piece of crap picked up on your last ride. Bearings normally make a grinding noise when they fail but it could be a bad bearing. If you don't see any external cause then I would take the wheel off and check for internal causes. See if you can narrow down where the noise is coming from with a poor mechanics stethoscope. A short piece of garden hose held up to your ear, move the other end around to different parts of the rear wheel while it is making that noise. When the noise heard from inside the hose is the loudest, then the end of the hose is closest to the source.

I will try to remove the rear brake caliper, I'l have to rebuild the master cylinder anyway. The bearings are all new, but one could never be sure..
I have noticed that my chain guard has been hitting the rim, and some of the plastick have been worn of, but cant see if that could make a sound like this.. It sounds like its from the inside the rim, or bearings area...


Oh, and by the way.... I really am looking forward to clean that dirty rim 
Cheers

[jscgdunn]

I have heard it before.  Undo the clothes pin:
https://www.youtube.com/watch?v=cs0fzzuxTBc

[racerrad8]

Ken,

That is a bad bearing...

Do I recall you having to alter the length of the internal spacer(s) for that wheel?

Randy - RPM

[aviationfred]

My best guess is......

It sounds like the possibly the left hand wheel bearing could be bad. You may not be able to hear any grinding, due to the bearing being covered by the sprocket carrier. As for the noise you do hear. With the bearing being bad, the rubber cush drive is sliding around and squeaking as the wheel rotates.


Fred

[FJ_Hooligan]

The bearings are all new, but one could never be sure..

Can you describe your bearing installation process?  Hammer, press? 
If you put excess force on the inner race during installation that could cause premature failure.

[Pat Conlon]

Probably wheel (or cush drive) bearing.

Grab the wheel and/or sprocket and see how much play you have in it.

Hmm... I will check and se if theres any play, but they should be torqued down so ther shoulden't be any...

The torque on the axle nut has nothing to do with a bad bearing....unless your inner spacer is too short.
As Randy questions, is the inner spacer the correct factory spacer for the rear rim? Positive?
If so, and the bearings are new (inc. the cush drive)....then you have to question your installation technique.
Regardless....time for new bearings..

[Joe Sull]

I have heard it before.  Undo the clothes pin:
https://www.youtube.com/watch?v=cs0fzzuxTBc

[keand3]

Sorry for late reply guys, been busy with the bike.

Randy: No, the internal spacer is original. That's the one sitting between the bearings you mean,  right?

Fred: The sound seems to originated from the left side of the wheel, and it could be the bearing on the sprocket carrier since i didn't replace that, it came new with the carrier.

I did notice when i tourque it to spec it notice to sound and as soon as i released it some it stopped. I took the wheel of and focused on the left side and noticed something peculiar. Either it seems like the left bearing isen't installed all the way in, or the is the wrong inner spacer. I could take my finger and wiggle the spacer around and that's not right.

I am hammering the bearing in with a piece of wood that press the entire bearings OD. I do remember when installing that i heard the distinctive sound when the bearings seats thevrims edge.

The inner spacer wasn't loose when i installed it the first time, but i could have been sloppy and not noticed. I will need to check tomorrow with the other spacers that i got to see which length they are. Fzr spacer should be longer, right?

[FJmonkey]

Wood is not good for bearing install. It compresses where it gets the most resistance and, then transfers the load to the center race of the bearing, side loading it. Better to find a piece of pipe that is just under the major diameter as a punch. Some flat plates and some all-thread with nuts and you have a press. Or use a punch/drift with a small enough tip to tap the bearing in little by little. Constantly moving around the diameter to prevent the bearing from going in all catywompis. It takes more time than having the proper size punch, but it works and does a proper job.

[Pat Conlon]

....and put the bearings in a plastic baggie, then pop them into the freezer the night before the install.
....then warm up the bearing race (on rim) with a heat gun....not too hot, not scalding, just very warm.

Every little bit helps....

[aviationfred]

+1 with what Pat mentioned about putting the bearings in the freezer overnight and heating the wheel. When driving press fit bearings, you want the driver to only apply force to the outer bearing race.

This is what I have to drive wheel bearings.

http://www.harborfreight.com/10-piece-bearing-race-and-seal-driver-set-95853.html


Fred

[red]

Sorry for late reply guys, been busy with the bike.  I am hammering the bearing in with a piece of wood that press the entire bearings OD. I do remember when installing that i heard the distinctive sound when the bearings seats thevrims edge.

Ken,

You can use an old socket, the same size as the outer race, as the correct-sized "punch" to drive the bearing into place.  Put your piece of wood on top of the old socket and hit the wood, to avoid transferring the hard hammer-shots to the metal of the bearing race.  The correct-sized socket should just fit (closely) inside the wheel hub, where the bearing will live, before you begin installation.

Cheers,
Red