I've spent hours over the past two days trying to locate instructions on how to port PA50I and/or PA50II cylinders. I'm looking for specifics - like raise exhaust port 2mm, and the same for the transfer ports. In these hours of searches, the only result was information suggesting that raising the exhaust port on a PA50I 2mm can be done to match a stock PA50II port.
I'm hoping that somebody has experience that they are willing to share. Port maps would be good, too, but basic dimensions would be very helpful.
In order to remain a legal moped in Nebraska, it must be less than 50cc, so I'm looking to get maximum power out of the stock cylinder . . . .
And yes, I've looking for a performance exhaust, too.