Nortons - General

Hi guys
With the take over of Avon tyres by Goodyear, Roadrider tyres in 100/90 × 19" are getting hard to find.

After finally getting my rebuilt engine run in, its time to concentrate on the fine tuning.

OK So I've got seen 4th gear layshaft cog with number 5 and number 6. Both SEEM to be similar.
Anyone tell me the difference?
Cheers
Paul

I'm looking for opinions and or advice from the Norton sages.....but I have to be honest and admit this is not a Norton query but thought tyres and rims are pretty universal.

I have a knackered grey faced tacho 1964/5. It might rebuild OK but i cant find a supplier of parts, particularly the face for the 2:1 ratio clock. Can anyone help?

This is from page 85 of the Edgar Franks 1949 Norton Motorcycle Maintenance and Repair.

BBC1 today 25/5/25: someone turned up with 2 Featherbed Manx frames.  One still in Rex McCandless's assembly jig.  Plus steel templates to bend the tubes to correct curvature.  Antiques Road Show, final item...see BBC iPlayer

I'm sure much has been written about this topic down the years - but I'd like to revive it after a recent comment on a Commando thread.

I have some handlebars on my Mk2 850 Commando that have makers numbers stamped on them. I'm trying to find another set of bars the same but no amount of googling is turning anything up. Can anybody tell me who might have made these?