He doesn't have to prove it, he doesn't even have to say much, just say, "yes, I pulled him over on a bike with an engine installed in it."
Judge asks you how big the engine size is (you can lie and say 49 or tell the truth and say 66/70) and then judges that the bike qualifies for a moped based on those 2 items, or ups the fine by adjusting the violation.
Then you can speak all you'd like, but it's going to be very hard to convince a judge to stab an officer in the back in a courtroom unless the officer can be proven to be mistaken beyond reasonable doubt. I don't think you can get a jury, traffic offenses are usually written up and processed in a way that are far different than criminal cases. The difference is so stark that your criminal history and driving history are basically separate identities, they rarely will ever be affected by the same event. So much so that insurance companies couldn't care less about your criminal history, and non-driving jobs wouldn't care at all about your driving history.
I'm not saying you can't fight it successfully, but it is going to be difficult, you basically have to prove your innocence or prove that the officer can't prove he knew you were doing something wrong, like proving that he can't prove you were using the engine at the time.
It's not that difficult to understand, you need to find a place that the bike will fit into before anyone is willing to take it out of where somebody else said it should be. Anyway, I'm now done with this argument, you're hell bent on trying to shove any ticket you get up somebody else's ass, if you don't have the right elbow grease your going to have a hard time finding a willing as***le. Every dollar they can f*** you out of is another dollar for them and their cause. Even dead men clutch their wallet, have fun prying..
