Heavy Twins

..not a performance enhancement...

When out for a run to run in my 1960 Dominator 99 I heard a bit of a tapping sound, I thought a valve tappet needed adjusting.

Need some education with cylinder head for 1967 N15CS

What's going on with the offset counter bore, does it serve any purpose ? Looks like a squish band but what not full circle ?

The Dominator 99 I took over is fitted with bronze/steel clutch plates. (I assume sintered bronze).

Hello wonderful helpful fellow Norton owners..
Reaching out for help and thoughts again please.. because I can't find this information in any reference books or pamphlets on the subject . 

I am replacing the dipper switch of my bike, but I am a bit confused on the right Lucas part to use, the dipper is all-in-one with the horn button or separate?
/Giovanni

Where to get and should I use a solid Copper one or not ?

Hi guy's can anyone tell me how to measure the cutaway size on a amal concentric carb. In layman's terms please 
 

In comparison to a 650ss what sort of strength is needed to kick start a Norton 350 cc model 50.?

Hi can anyone help me with setting the pressure on the check valve located in the timing cover
please.