I want to road tune my Vespa 50 s.
I've bought a DR 75 cc cylinder and a 16.16 carb, and everything necessary for it to work. Now the site recommends a Pinasco 16 teeth pinion or a 3.72 transmission. But it does not explain if I'm able to put the Pinasco pinion in my Vespa 50 engine with the normal transmission ratios. Now the 3.72 transmission makes sense to me, because both cogs change size so the fit together. But i can't how see a single cog (the Pinasco Pinion) would fit into my engine and make it better?
But i hear that it's easier to change only the Pinasco, rather than the 3.72 transmission.
So am i able to just install the Pinasco on my original Vespa 50 s engine without anything else, or do i need something to go with it to make it fit? and which upgrade is better - the Pinasco or the 3.72 transmission?
I hope someone can help me!