What do you think about 0/10W engine oil for my primary chaincase to lessen clutch plates sticking ??

Whale oil is the best. But if you can't find it in your neck of the woods, use ATF.

I use Dexron, the infantismal friction coefficient difference between Type F is imperceivable in the Norton clutch.

FWIW, many years ago I was heavily into drag racing and, along with a couple of other cars we ran a SS/FA Dodge Challenger 440 with the OEM Mopar 727 automatic transmission. We rebuilt the transmission per Mopar's "Direct Connection" racing program recommendations which included Type F fluid rather than the standard Dexron used in the OEM 727 transmission. The valve changes in the transmission made each shift essentially instant (very uncomfortable on the street) and the Type F fluid further eliminated any inherent "smoothing" of the shift that Dexron provided. The tranny - shifted with a manual-change linkage - would "bang" each shift change, regardless of throttle position. IOW, if you slowly accelerated the shift quality was exactly the same as it was with full throttle runs on the strip. Of course, most of this was due to the tranny mods but the Type F was part of the mod per Mopar.

Yeah...this has nothing really to do with Norton clutches - just reliving the old days...sorry!

ludwig said:

Not so. If you don't free the plates before starting, you will have a hard time shifting into 1st gear.

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I had a Triumph that the plates would lock together every night. I tried shifting it once with clutch and it took off, barely controllable. I braked hard to stall the motor and saved the bike/self.

If you ran the primary chaincase dry, and just had the engine breather lubricating the chain, and greased any bearings in the clutch centre, the lubrication would probably be sufficient. On my bike I use a single row primary chain with a old style Norton clutch. It all sits out in the air with a metal guard around it. I just give the primary chain a squirt of lube before racing. The primary chain lasts for a lot of races. I always wire the clip.
A lot of things are theoretical. The Triplex chain on a Commando is probably overkill for reliability. But what comes out of an engine breather is probably enough lube for a primary chain.