Mk3 swinging arm bushes.......

JOHNO23 · May 15, 2020

I’ve just had new swing arm bushes delivered from Andover Norton. Seems a fairly straightforward job to fit them. I’ve read they will need to be pressed in to the swinging arm. The problem or possible problem is that they don’t need to be pressed in! I can tap them in fairly easily, they seem snug but obviously not as snug as if they had to be pressed in. Is this a problem,or can i just go ahead and fit them? Thanks in advance.

Peter R · May 15, 2020

Straightforward job indeed, do not forget to immerse the sintered bronze bushes in oil for a couple of hours before fitting.

Peter R · May 15, 2020

Another thing: I fitted isolastic shims between the bushes and the swing arm cradle to eliminate axial play.

baz · May 15, 2020

If they go in as easy as you say then I would locktite them in
The ones I have changed have been a tight push fit

RoadScholar · May 15, 2020

You can add the clamps that will take out the radial play and will reduce, possibly eliminate, radial play. I do like Peter R's idea of employing ISO shims, if needed; I have done many swingarm re-bush services and have been impressed with the tight fit, but have wondered when I'd run into a swingarm on one side of its tolerance and a cradle with tolerance in the other dimension; now I have a solution.

Best.

marshg246 · May 15, 2020

JOHNO23 said:
I’ve just had new swing arm bushes delivered from Andover Norton. Seems a fairly straightforward job to fit them. I’ve read they will need to be pressed in to the swinging arm. The problem or possible problem is that they don’t need to be pressed in! I can tap them in fairly easily, they seem snug but obviously not as snug as if they had to be pressed in. Is this a problem,or can i just go ahead and fit them? Thanks in advance.

I would say that if you can slide them in without tools, they might be too loose but you said "tap them in". That sounds fine to me.

cliffa · May 16, 2020

Anyone tried these.?...

Norton Commando 750 swingarm bush upgrade set | eBay

This is a major flaw in the original system for swingarm support. The constant oil leak from the original system makes for a high maintenance system that really doesn't work. They are for comparison only.

www.ebay.co.uk

Mk3 swinging arm bushes.......

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