PD: Primary Drive Norvin primary & clutch

[D.Harvey]

Hello, I'm looking at options for primary drive for my 'chopped' cases Norvin..
Obviously a Bob Newby belt drive is an option, but has anyone gone with the Norton Commando clutch diaphragm and triplex chain to the standard mainshaft sprocket and ESA? If so easy fit? any problems?
(Image of Corish Vincent with this set up)

I sort of want to keep things classic looking, altho will probably be mostly incased by some sort of primary cover.

 

[Chris Launders]

I had Norvil make me an engine pulley with a cush drive sleeve PD4 in it and use a 40mm belt and their clutch, not the slightest problem in over 20 years once I stopped oil coming down the mainshaft, you need a pushrod seal which they now do.