can enyone tell me the steps to upgrade a vespa 50s to 125+ ?
keep the faith


basically you need to change the cranckshaft with a Primavera one or any Mazzucchelli race for primavera it depends how you would like your engine, then you need to upgear , then you need to buy a kit for primavera (polini, malossi…) a carb and manifold. And of course it would be a good thing if you have your cranckcases matched to the barrel you will be using.