Is there a swing arm spindle replacement/upgrade kit that is leak proof for my 1973 850 ?

Tornado said:
S

Thread 'Swing Arm Bearing Conversion'

I received an email from British Cycle with a link to a swing arm bearing conversion kit made by British Cycle Repair.
This conversion does not use needle bearings but six ball bearings.
Has anybody installed this kit, or have thoughts on it??
I'd appreciate a link if this has already been discussed.
Click to expand...


A few weeks ago I left a comment on this guys video about why the earlier design single bolt swingarm tube that he was using in the modification video will always develop play by wallowing out the tube without the addition of Kegler clamps. He blocked my comment from public view. His video popped up on one of my other computer feeds where I wasn't signed in to youtube and my comment was invisible from view on any computer except the one I was signed into youtube on. I went back and erased my comment from his video..... after I realized that he blocked it.

So he's got the comments enabled, but blocks the ones he doesn't like. One look at his modification on that single bolt swingarm tube tells me all I need to know about his depth of knowledge...
 
o0norton0o said:
A few weeks ago I left a comment on this guys video about why the earlier design single bolt swingarm tube that he was using in the modification video will always develop play by wallowing out the tube without the addition of Kegler clamps. He blocked my comment from public view. His video popped up on one of my other computer feeds where I wasn't signed in to youtube and my comment was invisible from view on any computer except the one I was signed into youtube on. I went back and erased my comment from his video..... after I realized that he blocked it.

So he's got the comments enabled, but blocks the ones he doesn't like. One look at his modification on that single bolt swingarm tube tells me all I need to know about his depth of knowledge...
Click to expand...
A common practice.
It does not look like that inner race/bearing can rotate fully...all the weight and friction look to be concentrated in one spot within those rollers.
Just an observation, I have never tried them nor examined a set after extended use.
 
Last edited:
HRD said:
Replace the existing sintered bearings with bearings machined from lube impregnated polymer bush known as Ertalyte TX manufactured by Dotmar. There is a Norton owner in Australia that makes and sells these on xbay Australia.
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That's what I did. So did @acadian. You can see them in his build "Let's go racing" They were not meant for a 73 swingarm, but the later 74 with welsh plugs. I believe I assembled mine with all the felts and put some 140 in there for the hell of it. Sealed the welsh plugs with silicone. Made a couple of "Kegler Clamps" with collars obtained from Mcmaster Carr. And Bob's your uncle.
 

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