This 2019 version of the P5XLT carburetor is the same as the MEPHISTO OFF. And that's good
I think a cooling head type rolling engine would be better, but I'm not an engineer.
Crankshaft 14.5mm I think that is what now all the newer NOVAROSSI engines.
I think these new developments have given better fuel consumption compared to previous editions of P5XLT.