That plug chart of Jay's is not the color of an insulator after two miles of riding..is it??? ..what about the color on the original post ...some is developing under the electrode....post a brand new plug next to any plug chop so it's possible to evaluate if it's white or even whiter ...
Here's an idea: keep jetting up until it's gurgling. Go higher and it will four stroke to death. This is the cheetachrome method...if u keep changing things and nothing happens ...other problemo...
Everybody says you gotta cut the threads off the plug to get at the base ..true..but really how many do that...it's quite a pain
If you rode for two weeks and your plug was that white ...that's real bad. A two mile chop is a pretty subtle thing. Also where the part of plug most exposed to the exhaust port is at least on a Vespa is a bit different than elsewhere, ie leaner . But perhaps I'm wrong on all of this. What u say Dillon?