So I have the low pipe Roma. it is a Jawa motor, same as the Type 21 scooter. They put Jawa motors on them to make them price competitive with American minibikes. The full on Italian ones went for high $300s and were nearly double what a minibike went for back then. So they tried meeting in the middle. Clearly not too many sold. I need a tool box cover for mine, it is missing. Good luck on that. The high pipe one claims 45mph with a Dellorto 14.14. Notice on the low pipe ad, they claim 50mph. That is because that model (the one I have) has the same Jawa 19mm carb as found on the type 21. And yes they do 50mph which is terrifying on 10" wheels.