I talked to a CHP officer tonight about my bike, and he said that a motorized bike without pedals creates a gray area unlikely to become a problem. He said that in his opinion no additional license is needed, nor is registration. He said a class C license and sensible operation (obeying speed limits, staying in the bike lane, appropriate lights, hand signals, etc.) is all that is needed. He did warn me that a cop "having a bad day" (as Gearnut puts it above) might issue a fix-it ticket (requiring the pedals to be put back on) but he said legally that's all that could be done, and he said that in his opinion that would be a questionable move on the officer's part. So I'm gonna keep my feet on the pegs and my wrist rolled!