I'm thinking of upgrading my GranTurismo '67 engine to give it a bit more power. I've heard a lot of good things about the Pinasco 2-port kit (http://www.sip-scootershop.com/en/products/racing+cylinder+pinasco+177cc+_80510000). I already changed the crankshaft to a Mazuchelli one, and the ignition has been replaced by an electronic ignition. The exhaust is a Sip Road.
I would use the Pinasco plug-and-play without adjusting the ports, but there seems to be some discussion about the carb. At the moment I'm using the original 20/17 carb, but I still have a 20/20 spare (P125X) carb somewhere. Would this be sufficient (off course i'll have to adjust the main jet)? I was also thinking of buying the Polini air intake system, but maybe this would be an overkill on the 20/20? What about the spark plug and ignition timing?
Thanks in advance!