yeah 200 watts is stuff all I used to have a 500 watt pushbike engine that was built into the front wheel, went alright and got about 20k or so before needing charging.
I had one of those 70cc pushbike engines in those chopper looking pushys, had billet head, expansion chamber would get to about 70kmh pretty easy, but got done near home and they needed 2 cop cars and a motorbike cop to harass me about it, then ended up getting dropped because I told their boss or whoever was in charge of them what happened.