Excessive Rear Wheel Freeplay - Bearings

[cb1rocket]

Ok it failed on the MoT on rear wheel bearings.

Put some spanking new bearings in - still lots of freeplay!!!

What have I done? Or is my spindle worn - is that possible?!

I can see the movement from the inner race to the spindle and there is slight movement, but couple that over the whole length, it moves alot.

Check my CB1 wheels with good bearings, hardly any movement whatsoever. So i know my GP100 rear wheel naff/shite/whatever you wanna say.

Any ideas to the cure?

Cheers

[BanditsHigh]

Either you've missed out a spacer (externally or the main spacer inside the wheel between the bearings) or the housing for the bearing is worn

[Phoenix]

Did you just replace the bearing with what was already in there or check that you actually got the right size, maybe the inner race is slightly larger than it's supposed to be. Either that or missing spacer as Bandit says, check on a microfiche.

[cb1rocket]

Tricky one here as its a Suzuki GS125 rear alloy on a GP100, got all the new bearings matched up to the old ones. They were the same as standard GP100 spoke wheel bearings so its the same configuration. Spacer tube inside was the correct length and is put back in. I'm missing the oil seal off the sprocket carrier but can't be why there is movement, its not a bearing so. Have checked the parts fische but its all there abeilt the oil seal.

So for the time being I have bought another GP100 rear wheel - the spoke type so hopefully it will be ok and its just that my spindle worn.

Any more things to look at?

[.]

The spindle itself should not wear at all.

The spindle should be a sliding fit as it passes through the inner races of the wheel bearings.
When everything is tightened up the inner races are locked into place so they cannot spin to cause any wear whatsoever to the spindle. The outer races are already held in place by being an interference fit in the wheel hub, leaving any rotational movement to spin the ball bearing themselves. The ball bearings and the bearing tracks are the only bits that should ever wear

If I understand your post correctly then the noticeable play between the spindle and the inner wheel race must be caused by an incorrectly sized spindle fitted or oversized inner bearing race.

[Kickstart]

Hi

Looking through an old book, GP100 rear wheel bearings are listed as a pair of 6201s, while the GP125 uses a 6202 as does the GS125. Difference between a 6201 and a 6202 in the inside diameter is 3mm (12m v 15mm).

All the best

Keith
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[P.addy]

[Kickstart]

[cb1rocket]

I have the bearings with 12mm inner races, apart from the sprocket carrier bearing which is a 17 so that the hollow stepped spacer can pass through.

I'm baffled whether I have the correct ones at all now?!

[cb1rocket]

right looking at the bearings from wemoto suggests that I may have got the wrong bearings. I know I have the right out diameter and the correct inner diameter - But looking at them seems to suggest I have the wrong thickness and should be looking at a bearing thats thicker.

Also my sprocket carrier moves alot to both at 12 & 6 and 3 & 9 o'clock positions in movement.

At the moment I have:

Sprocket Carrier Bearing being 17 40 12
Rear Right being 12 37 12
Rear Left being 12 32 10

All in ID, OD and Width respecstivitly

Any GS125 owners to shed some light on the widths they have?
Cheers

[cb1rocket]

After much head scratching, i'm unable to find the curse of my bike's rear wheel problem.

So far I have compared all the bearings and as it happens I can't get thicker width bearings without changing the ID/OD etc. So I just can't see why there is so much play in the rear wheel. I know I have got a replacement wheel coming, but i'm just peed off why its not working for me. New bearings (3 in total) all replaced and i'm screwed.

On another note the old ones were quite easy to shift out with a cheapo pound shop screwdriver. Should it been that easy?

[stonesie]

Have you got a vernier calliper or a micrometer? something to measure the spindle outside diameter?

[cb1rocket]

I have a micrometer, but as other said, it shouldnt wear out at all as there is no friction/rotating parts as thats what the bearings are for

[Kickstart]

Hi

I think I would be tempted to measure the bearings as well. Check that they are the size they are meant to be

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Phoenix]

[cb1rocket]

Cheers will look into that. As i have countless checked many times. I have the correct bearings as so to speak.

I have thought about using a replacement gs125 spindle but they are all 15 diameter and therefore would be too big to pass through the swing arm holes.

I'm just going to see later whether it could be possible to remove the sprocket carrier bearing and the hollow step spacer out of the sprocket carrier and the wheel bearings along with the spacer. Then place them all on the wheel spindle and put onto bike to see where the movement is coming from. Therefore without the wheel and sprocket carrier (but leaving the drum back plate on) I would be able to see how it all fits on.

Hopefully that might give me a clue.

I did think about the wheel spacer being incorrect at some point. Cos if its a gs125 wheel then they come with an ID of 15mm for for Ø15 spindles. But mine's has the (assuming) old GP spacer installed as its ID is Ø12. So me thinks if its too short on overall length then the bearings won't engage together no matter how tight you do it up.

Does anyone agree?