Front wheel bearings - BMW Luxury Touring Community
 
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post #1 of 12 Old Aug 17th, 2013, 4:09 pm Thread Starter
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Front wheel bearings

Ok, I got my wheel bearings changed today. Why is that pipe between the bearings? It makes it very difficult to get the bearings out. When you put the new bearings in they go up against a seat and can't travel anywhere. What would happen if that pipe was not put back in? I did put it back in but I can't see the necessity of it.

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post #2 of 12 Old Aug 17th, 2013, 6:51 pm
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Re: Front wheel bearings

When the front axle is tightened down, without the spacer, the inner bearing races would begin to bind. You can try it and see, but you'll be buying new bearings. The spacer takes up the space between the two bearings so when you tighten the axle down the spacer is being pinched between the two bearings, and yes it does make getting the bearings out a pain. I usually weld a piece of flat strap to one of the bearing's outer surface, then just use a rod to knock it out. Then remove the spacer and then the other side bearing.

I think the correct tool to use is a blind hole bearing puller. Like this one,
http://www.ebay.com/itm/New-Blind-Ho...7ea0b0&vxp=mtr

Rarely does a manufacturer install something in an assembly when it serves no purpose. Almost every bike front wheel uses this setup, although some use a spacer which has enough space between it and the wheel hub, which allows the spacer to be moved slightly to one slide. This allows you to tap the bearing out little by little.

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Last edited by azccj; Aug 17th, 2013 at 7:09 pm.
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post #3 of 12 Old Aug 17th, 2013, 7:55 pm Thread Starter
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Re: Front wheel bearings

Like I said, I put it back in. What I did think of later was that I should have relived the inner surface of the spacer which would have allowed for a small edge to tap on the bearing. I probably won't have to change them again for as long as I have the bike.

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post #4 of 12 Old Aug 18th, 2013, 6:43 am
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Re: Front wheel bearings

Marty, how many miles do you have on your bike?

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post #5 of 12 Old Aug 18th, 2013, 5:01 pm Thread Starter
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Re: Front wheel bearings

126k. The old bearings felt pretty smooth when I got them out. I have a noise that sounded speed related not rpm related so I thought I would change the bearings. It helped somewhat but I still have some noises that sound like they are coming from the front end.

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post #6 of 12 Old Aug 18th, 2013, 5:08 pm
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Re: Front wheel bearings

Your front end noise is cupping on the tire. Lean side to side at speed and you'll see what I mean. Do not screw with the axle spacer. It is precision machined to hold the proper width between the inner bearing races. It is the same length as the distance between the two bearing seats on the hub. You would trash the bearings instantly without it installed.


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post #7 of 12 Old Aug 19th, 2013, 9:38 pm Thread Starter
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Re: Front wheel bearings

I don't think it is tire noise. I know what that sounds like. This sounds like a harmonic imbalance in the motor. I assume that there is a timing change in the motor. Could that be getting loose? Could there be something loose in the tranny. Is this something I should even be worried about. I know that these bikes make noise.

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post #8 of 12 Old Aug 19th, 2013, 10:27 pm
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Re: Front wheel bearings

Trust me. Run your fingers across the front tread. There's bumps on the tread guaranteed unless it's almost brand new. Common issue on all big bikes. Take her up to 50 mph and then lean side to side. See what happens. It is possibly the classic "K-whine" which is caused by gear lash on the alternator drive or other various sources. It is usually most pronounced at about 3000 rpm and nothing to worry about. Until you try leaning side to side though, I'm sticking with tire noise.


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post #9 of 12 Old Aug 19th, 2013, 11:51 pm
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Re: Front wheel bearings

Yep, sounds ridiculous, but it may also be coming from the rear tyre as well. My K100 was bad for it. You'd swear it was in the front, the sound would travel up through the fairing. New rear tyre and all would be well till the wear started again.

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post #10 of 12 Old Aug 20th, 2013, 7:28 am
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Re: Front wheel bearings

If you think it's engine noise just pull in the clutch and let off on the throttle and see if it changes
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post #11 of 12 Old Aug 20th, 2013, 8:37 am
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Re: Front wheel bearings

I had a similar noise that I thought was coming from the front of the bike. It keep getting worse over the course of about 3k. Turned out is was the final drive!
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post #12 of 12 Old Aug 20th, 2013, 7:35 pm
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Re: Front wheel bearings

Marty maybe you are ready to trade it in; go to Shawmut Hills ;just for the heck of it I tried their 2012 ST1300( New by the way)left over; 13,000 Dollars with the trade in and way you go.
It is a nice ride ;but I am going to stick with what I got for now

Gary
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