SOHC.co.uk Forums > CB350/400

Rear disc conversion

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Bryanj:
Having read all this i have no doubt as to your capability to fx it. Look at how the standard arm pivot works and it should be easy, just need to know its necessary!

allankelly1:
To be honest a simple plain p,bronze bush that fits either end of the swing arm pivot tube ( like the ones Julie supplies for the standard arm) and hollow shaft that is a slide fit on the bushes which the swing arm bolt can pass thru should be more than sufficient

All you then you need is the correct sideways float that can be adjusted on shims and some dust covers

Lastly you can alway add a grease nipple

But thank you for the advanced warning on what to expect

Best wishes always Al


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allankelly1:
Hi

Got Dresda swing arm today

Very happy so far and it’s the taper roller bearing type so happy days



Will need some TLC like the bearings regreasing and a powder coat or paint but things are on the up

Also sorted my brake  line feed and bleed the system



 





And as predicted pedal movement is much less with the system filled and bleed

Just need to sort  out all the rearsets parts in aluminium etc and the system should be up and running


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Bryanj:
I notice the swingarm bolt has a castle nut so the tightness must adjust the tapers play, hope the bolt is a good fit in the frame holes.

allankelly1:
Hi

The bolt supplied “looks” the same diameter as the original swing arm frame bolt holes but without removing the arm I cannot confirm

So I have please a couple of questions

Why diameter is the original swing arm spindle please?

Also what is the frame internal distance please
between the two mounting holes  / plates

That way I can dummy up the assembly on the bench first  as rather than setting the preload  in the tapers via the castle nut I will make an internal precision length spacer tube that sets the inner race distance (like a internal wheel bearing Spacer) so the pivot bolt can be just tightened up fully (rather than tightened just to set the taper roller preload) without overloading side preload on the taper bearings if that makes sense?

Many thanks in advance

Best wishes Al


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