ALL BALLS Rear Wheel bearings, problem? - Kawasaki KLR 650 Forum
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post #1 of 23 Old 11-14-2016, 08:44 PM Thread Starter
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ALL BALLS Rear Wheel bearings, problem?

Who among us has used the All Balls rear wheel bearing kit, part #25-1056 (KYA30-08A)?
And then had installation interference with the swing arm Width!

I think that the Left Hand bearings must have been .010-.020 inches Wider than the old OEM bearings! I Will Not remove them to measure them, but something is apparently incorrect.
I had to 'spread' the swing arm, to re-install the wheel. Could be a real pain on the trail!

78,323 miles on the OEM bearings and many, many rear tires. The sprocket bearing had just a bit of 'roughness'.

I also replaced rear sprocket, drive chain and rear brake pads.

pdwestman
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post #2 of 23 Old 11-14-2016, 09:13 PM
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Paul, I think I have the All Balls rear bearings and some SKF bearings. Would you like me to measure them?

I don't have any OEM, so you'd have to provide that measurement off of your old one.

If you want me to measure it, tell me the bearing number.

Tom

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post #3 of 23 Old 11-14-2016, 09:21 PM
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You may want to rethink checking those bearings Paul.
In my professional experience bearings are held to EXTREMELY tight tolerances, in the 2/10000ths range. For a bearing to be 10 to 20/1000ths over width is almost unthinkable. The more plausible explanation for your issue would be if a bearing is not fully seated in the housing, perhaps from debris getting trapped behind/between the bearing and the housing/hub. If this is what has happened the bearing will fail quickly due to the improper spacing between the inner races of the hub bearings. This distance, normally maintained by the hub spacer sleeve, is critical as it maintains the running alignment of the inner and outer bearing races. If there is debris trapped behind the outer race this will have the same effect as having a spacer sleeve that is too short. When you tighten the axel it will put a huge side load on the hub bearings by squishing the two inner bearing races together while the outer races are held further apart by the debris behind one of the outer bearing races.
You can check this condition by removing the wheel and inspecting the hub spacer. It should be held snugly between the two hub bearings with no evident freeplay.
Aside of debris trapped behind a bearing race, a bearing just not fully seated in the housing can produce the same effect.
Best Regards....JustJeff

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post #4 of 23 Old 11-14-2016, 09:27 PM
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Sorry Paul, I don't have the AB 6004.

Gotta agree with JJ, too.

Tom

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post #5 of 23 Old 11-14-2016, 09:33 PM
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bearing dimensions
1)sprocket...6003......17mmx35mmx10mm wide.....0.3937"
2)middle.....6004.......20mmx42mmx12mm wide.....0.4724"
3)right side....6204....20mmx47mmx14mm wide.....0.5512"

bearing numbers from Toms handy spec sheet for gen2 pdf2
jj

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Last edited by justjeff; 11-14-2016 at 09:37 PM.
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post #6 of 23 Old 11-14-2016, 10:32 PM Thread Starter
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Quote:
Originally Posted by Tom Schmitz View Post
Paul, I think I have the All Balls rear bearings and some SKF bearings. Would you like me to measure them?

I don't have any OEM, so you'd have to provide that measurement off of your old one.

If you want me to measure it, tell me the bearing number.

Tom
Thank you Tom.
1987 OEM "Nachi Brand".
Sprocket Bearing, 6004NSL, Width, I.R. .4710 inch / O.R. .4710 inch. The circlip in the sprocket hub slipped in with no issues.

L.H. Wheel Bearing, 6003, Width, I.R. .3913 inch / O.R. .3918 inch.

R.H. Wheel Bearing, 6204NSL, Width, I.R. .5496 inch / O.R. .5496 inch.
The circlip on the R.H. bearing slipped in with no issues, so I'll assume 'no-problem'.

JJ,
I'm 99.99% certain that the bearing bores in the sprocket and wheel hubs were clean.

With a circlip on the sprocket hub and on the RH of wheel hub, it would seem the possible problem could be the LH wheel bearing or an un-clean LH bore. NUTS!

pdwestman
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post #7 of 23 Old 11-14-2016, 10:39 PM
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Paul,
Though I am surprised at the amount of variance from standard I agree with your logic. Out of curiosity what are you using for a measuring device?
JJ

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post #8 of 23 Old 11-14-2016, 10:42 PM
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Paul,

OR=.3932
IR=.3937

Tom

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“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


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post #9 of 23 Old 11-14-2016, 11:08 PM Thread Starter
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Quote:
Originally Posted by justjeff View Post
Paul,
Though I am surprised at the amount of variance from standard I agree with your logic. Out of curiosity what are you using for a measuring device?
JJ
JJ,
I'm using a 0-1 inch micrometer. Just now checked with a 1.00 inch standard!
justjeff likes this.

pdwestman
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post #10 of 23 Old 11-14-2016, 11:13 PM
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Well the amount of variance noted is not causing your wheel to be wide enough to have to spring your swing arm open to get the wheel in. I have had bearings pick up and gall the bore during installation a time or two. Makes a real mess of things!
JJ

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