First I will say, that the hose (C on image) on the evap system coming from the carb to the tee junction as seen in the image, is broken near the tee junction. so for all intends and purposes I have the hose removed from the carb currently, which I know is not the complete evap removal, but seems to be the test they suggest to see if problems are evap related.
As for the image, my evap system is difference, where I have two hose nipples on the manifold just like in https://modernvespa.com/forum/topic65874 <--this write up
So basically what is happening, it struggles and stalls at red light, especially when it was hot. and at high speeds and accelerating it struggles, feels like someone is pulling a rope on me like the rpm flutters if that makes sense.
I am not oppose to removing the evap even though I don't understand fully the repercussions? Will it just make Leonardo Dicaprio upset? does the rollover valve save my fuel in an accident? I think the only thing I am concerned with is fuel emitting from it while parked, I park some places where vapours and leaks would not be appreciated.
And again, I am having these symptoms but are they are indicative of evap? considering I already have a broken 'C' line? my carb was cleaned a year or two ago (didnt need it)... so I somewhat can rule that out I guess...