Guys, on holiday next week and intend to take the engine out and open up the ports and intake on my 2001 PX125. While I’m at it I would mind lengthening the gearing as it’s hitting max revs in 4th.
I’m a newbie to Vespa’s, so please excuse my ignorance, but what do I need to lengthen the gearing?
My setup is Malossi 166
Dell’orto SI24 carb