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General Category >> Rubber Side Down! >> Noise from rear wheel
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Message started by springman on 06/05/23 at 08:35:31

Title: Noise from rear wheel
Post by springman on 06/05/23 at 08:35:31

Help. I changed rear tire on the S40 yesterday. Bike has around 43K miles. After getting tire back on bike and spinning it to check belt alignment, the alignment was good but as the wheel spun it make a noise like when we were kids and attached cards to our rear wheels so that they would make noise as the spokes hit them. I though the tension was good on the belt but loosened it a bit anyway and again spun the wheel, the sound was softer but it was still there. I checked and could not see that tire or spokes or belt were making contact with anything. Is this what a bad bearing sound like?

Title: Re: Noise from rear wheel
Post by Ruttly on 06/05/23 at 08:48:36

Might be the bearing in the pulley hub going bad , DBM has a good upgrade if that’s the case.

Title: Re: Noise from rear wheel
Post by Armen on 06/06/23 at 08:37:02

Upgrade the pulley bearing to the double row yet?

Title: Re: Noise from rear wheel
Post by springman on 06/06/23 at 12:43:58

Thanks guys. What is the upgrade? I'll probably put the bike back up on the jack this weekend to see if I have any lateral movement and if so will take the wheel off and replace whatever bearings need replacing.

Title: Re: Noise from rear wheel
Post by verslagen1 on 06/06/23 at 14:25:05

2D2E2C373039333F305E0 wrote:

check the top of the belt all the way around, something could have dropped on it or the lower guard pushed on it.

here's the mod
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1561964431

Title: Re: Noise from rear wheel
Post by springman on 06/06/23 at 15:26:34

Thanks Versey. I just read the first couple of pages of the thread. I do not understand the need for the machining of the spacer. Can you explain this to me please? Thanks.

In my understanding the spacer just presses against the bearing and the machined spacer looks like it would go into the I.D. of the bearing which does not make sense to me. Please remember I am not an engineer.

Title: Re: Noise from rear wheel
Post by verslagen1 on 06/06/23 at 18:02:28

The spacer actually presses against an internal spacer between the hub and bearing.
So the bearing kind of floats there without compression.
The new bearing is double wide so the outside spacer is relieved so the same float is achieved.

That is kind of nice since the spacer is now retained and you won't have to go chasing it every time you pull the axle.

Title: Re: Noise from rear wheel
Post by Armen on 06/06/23 at 18:26:26

I have the modified spacers in stock if you want. You just have to buy the bearing. And ship me your original spacer when you are done.

Title: Re: Noise from rear wheel
Post by springman on 06/07/23 at 13:50:09

I am curious. So what happens if the hub is not machined?

Also, with the machined hub fitting/going into the bearing .338" (or whatever the dimension was), don't you then need to replace that dimension with washers or something?

Title: Re: Noise from rear wheel
Post by Armen on 06/07/23 at 14:06:03

So, the gag is, the bearing is wider, so the spacer gets narrower. Because the spacer fits inside the bearing, it has to have a step machined into it.
I like to Loctite the spacer into the bearing to make things even more secure.
If you think about it, the new setup should stiffen up the axle/bearing/wheel situation besides stopping the pulley from wobbling.