Stelvio = 8v only
1200 Sport = 2v and 8v
Norge = 2v and 8v ( 8v also known as 8vGT )
Griso =1100 2v and 1200 8v
2 valve engines have a black strip on the rocker cover, this covers plug lead. ............post 33 is a 2 valve
8 valve engines have the rear half of the rocker cover covered with a bit of black plastic. ....................
https://www.motorcyclespecs.co.za/model/moto guzzi/Moto_Guzzi_Stelvio.html
plug lead cover is painted silver.
don't be led astray by stickers that say 4 valves on the bikes. 2v = 2 per cylinder , 8v= 8 in total , bikes that say 4v are 4 per cylinder, but everyone uses 2v or 8v to save on confusion.
years of production are irrelevant, Italians do not care for orderly production, they are not German.
2v and 8v were produced overlapping. Learn to tell the difference. if you can't tell the difference, you need to learn. if you don't/can't learn, an Italian bike is not for you.
PS don't get a Guzzi if you can't take a joke.
when they are running fine, they are really good, when they fuck about.....you will want to fix it with fire.
if you get one, you will need to be friends with Tommy @ at Jim Allen's. Be prepared to have some owner input.
PPS the Scottish Rally
https://www.mgcgbscottishbranch.co.uk/scottish-rally/ come and show your face. I should be there, maybe on the MGX or my 1200 Sport or even the Quota.
http://ginoontour.blogspot.com/2018/05/scottish-guzzi-rally.html I'm in my underwear and my BM is in the background.