When I bought my first Vespa in 2009, it was a 1980 P150X. To keep up with the gang on their 200's, I fitted a Malossi 166 kit. I had the intake of the crank machined, fitted a racing clutch and a SIP racing exhaust. It is quite fast and goes like a dream, and although it outruns the 200's, it still does not have the torque of a 200.
I have since found a 200 engine, but now my question is: must I fit the 200 engine, or keep the racing 150 engine?
Your comments and opinions would be appreciated.