Question

Nope. There are some that run them because they get around the whole motorized bike thing. A pusher falls under no law and is an ideal way to motor where laws prohibit a motor on a bike. There's also no limit to the size. Watch Harbor Freight ads and the 6.5 HP Honda clone can be found for $100. $50 for a clutch and the majority of the cost is covered.

Use the search function, there are several threads on pushers. I've come in on the side of adding a seperate forum for them but.....