Dominator clutch

Allan. It might be a good idea to post this on 'Singles' since more of them (all of them?) had the inserts you describe.

I once asked Les at Russell Motors the same question. He said they used to have a press to push new (cork)  inserts in.  Some of the inserts on mine ( prewar single) can almost push out with my fingers, but they are trapped and not likely to escape when assembled. 

Do you need to change them? I see they are sold by at least one of our usual suppliers.

As usual., not a definite answer. Maybe someone else will chip in?

The friction inserts for the clutch drum are the same Ferodo material as fitted to the friction plates, but thicker.  They can be fitted by hand, but must be level with each other. 

I think that using cork would cause drag, tho' it does have a higher friction co-efficient than the Ferodo linings.  Cork does not cope well with even trace amounts of oil, as Ferodo does.  It's why the Ariel clutch runs dry in a separate chamber.

I would be interested to know if anyone supplies new inserts for the old Norton clutch, for the ordinary friction plates and also the chain-wheel

Paul

.... are all loose and in fact can fall out when assembling. However, when it's all together there's no way they can escape and the clutch works very well.

I suppose it's my impoverished background but my attitude is always to use what I've got unless it really really needs to be replaced.