norton mercury carb jet sizes

[marnane]

I have just installed a 930 premier carb, does anyone know the jet sizes? can't seem to find any information out there, thanks in advance

 

[AndyDMC]

My '61 650 standard is effectively the same bike, and I fitted a 28mm concentric, jetted with 240 main jet, 106 needle jet, 17 pilot jet, #3 slide

 

[marnane]

My '61 650 standard is effectively the same bike, and I fitted a 28mm concentric, jetted with 240 main jet, 106 needle jet, 17 pilot jet, #3 slide

mine is a 930 premier concentric, currently has a 200 main jet and a 106 needle, not sure on the pilot? it just doesn't seem right? This is how the carb arrived

 

[Mike40M]

Only premier I have came from Burlen with wrong float level, wise to check.
Without knowing I think around 250 could be a starting point. #3 slide and 106 needle jet sounds normal. 17 pilot jet might be small but a bigger one might be needed when you know how many turns you have on the air screw. My guess is 25 or 20. But main jet can be one step smaller with air cleaner.
I could be wrong.

 

[AndyDMC]

Ah yes, conical filter from RGM fitted last year when I had the head off and fitted a new premier to replace the knackered c.1998 concentric, itself fitted to replace the original monobloc. Previously open carb, but still seems happy, and I didn't jet up on fitting. Pilot now 1 1/8 turns out.

Andy