Bad wheel, wheel bearings, or both?

[dbeardslee]

My brother brought his 80G over on Friday complaining that his rear brakes were acting "funny." The rear disc was hot, so the first thing I checked was that the caliper was releasing. I just rebuilt his entire brake system a couple months ago, so I was pretty doubtful that was the problem. The disc was free, but as I spun the wheel by hand it was dragging at one point in the rotation, so I got out the dial gauge.

The runout on the disc is about .08", but the wheel is where things got interesting. I measured the runout on the wheel at .15", which is way out of spec. But with the dial gauge in place and zeroed I can grab the tire and deflect .20" to either side of zero just by pushing and pulling on it. That's .40" total movement of the rim, and it's got me wondering if the wheel is bad or it's just the wheel bearings that are shot.

Any ideas?

[DiverRay]

I would start with new bearings, unless you KNOW the bike had been hit at one time. If that's the case, a new rear rim, and bearings.
Just my take on it. I imagine it DID handle "funny".

[kboehringer]

.40 or .040?

.40" total movement of the rim
Any ideas?

dbeardslee,
If your talking .40 (nearly 1/2") not 40 thousandths, OMG! Lucky your Bro didn't get hurt trying to bring it to your house!

The wheel bearings must be absolutely ROASTED!

FYI. The left bearing IS still manufactured by NTN in their NE Georgia facility. It has a grease groove the bearing made specifically for Yamaha did not have but It won't hurt a thing. I have one in my DUCK and another waiting for install in the Mayberry Duck.

Any good bearing supply house can get 'em (i.e. Bearings & Drives [a Division of B&D Industrial]). They have PLENTY on the shelves and the bearing IS ABSOLUTELY STILL MANUFACTURED.

Sincerely,
Kurt

[dbeardslee]

dbeardslee,
If your talking .40 (nearly 1/2") not 40 thousandths, OMG! Lucky your Bro didn't get hurt trying to bring it to your house!

The wheel bearings must be absolutely ROASTED!

FYI. The left bearing IS still manufactured by NTN in their NE Georgia facility. It has a grease groove the bearing made specifically for Yamaha did not have but It won't hurt a thing. I have one in my DUCK and another waiting for install in the Mayberry Duck.

Any good bearing supply house can get 'em (i.e. Bearings & Drives [a Division of B&D Industrial]). They have PLENTY on the shelves and the bearing IS ABSOLUTELY STILL MANUFACTURED.

Sincerely,
Kurt

I've got an el-cheapo Harbor Freight dial gauge, but it works. One complete revolution of the needle is 1", and I was pushing it from zero to .20 and pulling it back past zero to .80. And I thought the same thing you did - those have got to be thousandths. But no joy - I looked at it real close ten times and no matter how hard I looked at it, it still read in hundredths every time.

Have you got a part number and a source for that left-hand bearing?

P.S. - He lives right next door, so bringing it over here was a pretty safe trip. The lucky part is him getting it home from work, which is about a twenty mile ride. Good thing he stays off the highway.

[dbeardslee]

Have you got a part number and a source for that left-hand bearing?

Let me rephrase that question. Would that bearing happen to be an NTN NA5904? I've got one of those in my hand right now. IIRC when I redid the bearings on Betsy I picked up an extra left hand bearing so I'd have a spare, and that's what I'm holding.

However, I don't want to give away or even sell my spare, 'cause that darn Murphy will show up the next day for sure.

[TopCatGr58]

Hey DB,

Yep, the NA5904 IS the bearing you want for the left rear. I just posted a reply to another member/thread regarding this very thing, and you can FIND it on a simple eBay search...just only select one that has in it's description needle bearings. A few with a slightly different prefix will be a combined needle/roller bearing design...NOT what you want!

T.C.

[dbeardslee]

Hey DB,

Yep, the NA5904 IS the bearing you want for the left rear. I just posted a reply to another member/thread regarding this very thing, and you can FIND it on a simple eBay search...just only select one that has in it's description needle bearings. A few with a slightly different prefix will be a combined needle/roller bearing design...NOT what you want!

T.C.

Thanks, T.C. Hi ho, hi ho, it's off to ebay I go.

[dbeardslee]

I found the 5903's and 5905's on ebay, but drew a goose egg on the 5904's.

[bikerphil]

Member olinrj may be able to get the left rear bearing for you....

http://www.xs11.com/forum/showthread...ce+list&page=2

[bikerphil]

Here is a link....

https://www.bearingsinc.net/

[kboehringer]

B&D Link

I found the 5903's and 5905's on ebay, but drew a goose egg on the 5904's.

I didn't follow the link provided by Phil. It's probably just as good as my source. I would guess their prices could be better than my source.

I think I paid like something like $25 for the tough to find bearing and it is the actual NTN brand. My company buys a lot of bearings from B&D so I just got multiples of all the bearings needed from them. I also think I got a LITTLE discount and didn't have to pay any shipping as they just tossed them in with one of our other orders.

As a second option, Bearings & Drives link:
http://www.bdindustrial.com/products...lubricants.php

They will deal with the general public and take credit cards. Not sure if the prices will be at all competitive as they are really geared more toward repeat industrial customers. But they are another option. Their customer service people will be 100,000% more knowledgeable of bearings and seals than any company that just re-sells bearings.

I can just about guarantee there isn't a bearing ever made that B&D can't find or find an equivalent replacement for.........

KURT

[dbeardslee]

I checked bearingsinc.net and bdindustrial.com and couldn't find the 5904's. I googled the part# and found what appeared to be the correct bearing at Motion Industries for $43.75 ea.

I also found them on another sight for $30 and change, but they required a minimum order of five. That made a synapse fire, and I remembered where I got the one in my hand. Another member had ordered from an outfit that required a minimum purchase, and he sold the ones he didn't need to other members, and I snapped up two from him.

But since I'm not the one paying for the bearing this time, $43.75 seemed perfectly reasonable to me, so I went ahead and ordered one.

Thanks for the help, fellas.

[kboehringer]

Motion Industries for $43.75 ea.

We buy from them too. Our B&D Service Rep found them for me.

Glad you found them.... Your Bro really needs 'em!

KURT

[dbeardslee]

We buy from them too. Our B&D Service Rep found them for me.

Glad you found them.... Your Bro really needs 'em!

KURT

I think he's got several things wrong back there. BA80 sent me a PM and advised checking the swing arm bearings to make sure that's not where the deflection is coming from. I got a fair amount of deflection measuring the swing arm too, but I don't think that's causing the brake dragging from runout on the wheel and rotor though. But I figure as long as I've got the wheel off to change the bearings, I might as well pull the swing arm and replace the bearings there, too. At least those bearings are cheap.

The good news is that it's supposed to be chilly and rainy around here for the foreseeable future, so he's not going to be missing much.

[TopCatGr58]

Hey DB ,

CAN YOU CANCEL THAT ORDER!?!?

Here's the Ebay one I was talking about, this guy has been selling them for some time now...months!

http://www.ebay.com/itm/NA5904-SYI-N...-/131533379363

The BOX in the picture is just an advertising for the SYI bearings, and that's why it says both ROLLER and BALL bearings....but his bearing IS the NA5904 needle bearing...a few members on here bought them, and they were correct, and HAD the lubricating channel/holes down the middle as well!

T.C.