clutch hub fit in bearing

Is the clutch hub (06-0743)supposed to be a slip fit in the bearing (06-0750)?

I'm resetting the primary drive sprockets for the belt drive and the basket doesn't so much wobble as slide in and out on the hub.

Thanks

Greg

It is a sliding fit but there is a snap ring to hold it together. Is there one on yours?

Guido said:

It is a sliding fit but there is a snap ring to hold it together. Is there one on yours?

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Yep. Thanks. For some reason I remembered driving having to drive the old bearing off the center. Must have been something else.

Greg

Greg, I have recently been doing some work on my clutch drum and comparing three separate inner drums, two were a sliding fit with a little bit of a tap to slide all the way into the bearing and the other was a little tight and required a bit of tappingmall the way on to tye bearing. The bearing was a tightish fit in the outer hub.

I had to recently shim the bearing by 0.003" with shim stock to get the bearing tight in a Maney housing for my race bike. Had a noticeable wobble before the shimming as the bearing could be pressed in by hand.
Regards Mike

dave M said:

Greg, I have recently been doing some work on my clutch drum and comparing three separate inner drums, two were a sliding fit with a little bit of a tap to slide all the way into the bearing and the other was a little tight and required a bit of tappingmall the way on to tye bearing. The bearing was a tightish fit in the outer hub.

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Gidday Greg
my tuppence worth here. For this application the fit should not be sliding but have some interference.

on the inner race of the bearing size for size to 3/4 thou interference, outside diameter 7 tenths to 1 1/4 thou interference. there are forces at play here that require an interference fit. but not too much. these tolerances will give a result that prevents fretting in service.
having an interference fit on both diameters will require careful assembly. the inner and outer diameters should be mounted in a manner that puts no stress at all on the balls and races when fitting. otherwise damage or short life may result. maybe the manual's technical specification section will give the factory specs.
corrections welcomed Aussie Bradley

B.Rad said:

maybe the manual's technical specification section will give the factory specs.

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The factory manual specifies a: "Deep-groove ball bearing-one dot" (so less clearance than standard) clutch bearing.

L.A.B. said:

B.Rad said:

maybe the manual's technical specification section will give the factory specs.

Click to expand...

The factory manual specifies a: "Deep-groove ball bearing-one dot" (so less clearance than standard) clutch bearing.

Click to expand...

Gidday Les.
U r spot on again. in modern lingo to me that translates as C2, less clearence than normal. the factory must have a good reason to specify this specific clearence. How common is the use of this bearing?. I reckon a lot of bikes run Normal clearence.

Regarding those figures of correct amount of interference on the clutch bearing inside and outside diameters.. the exact tolerances can be obtained in the SKF or FAG manufacturing program bearing book that describes all manner of bearings . it also gives journal and seat machining tolerances for a large range of sizes.This will remove all doubt.

perhaps some one has one of these books and would be kind enough to look this up and report the findings.
Best wishes Aussie bradley

There are C2 clearance bearings around for this. I got 5 of them on eBay a few years ago. I think they were NTN Japanese bearings. I used one when I was in there for the gearbox work last year and I think dirtymartini received one also but not sure how he made out with it. In 38K miles this has been the second time it has been done on my bike. The bearing fits were not sloppy for me.

B.Rad said:

L.A.B. said:

B.Rad said:

maybe the manual's technical specification section will give the factory specs.

Click to expand...

The factory manual specifies a: "Deep-groove ball bearing-one dot" (so less clearance than standard) clutch bearing.

Click to expand...

in modern lingo to me that translates as C2, less clearence than normal. the factory must have a good reason to specify this specific clearence. How common is the use of this bearing?. I reckon a lot of bikes run Normal clearence.

Click to expand...

There's already been a few discussions about this:

clutch-basket-play-and-gearbox-problems-mk3-t1629.html
clutch-bearing-clutch-centre-fit-t12490.html