Originally Posted by Roelof

First of all, do not rely on the written specs, mostly they are made out of nothing. And because Novarossi is producing several engines from cheap up to expensive they would never alow a cheaper motor running faster (in real and on specs). As I have mentioned several times that I have made 5 port engines run as fast as many top range models by just changing some timings. Timings is making the engine, not the amount of ports.