Ok I email Michigan SOS and asked if these are legal to use in Michigan and here is what I got back...
Mr. Bates:
Thank you for using the Department of State's web site.
Michigan law is silent regarding power assisted bicycles. There is nothing in the law that allows for a registration.
If an object has a motor making it self-propelled, it meets the definition of Motor Vehicle in MCL 257.33, with some very limited exceptions. Electric bicycles, motorized skateboards, go-carts, gopeds, golf carts, and Barbie cars are all motor vehicles. Unless one of these vehicles is able to be registered (as a moped, low speed vehicle, etc.), it is prohibited from operation on any public street or highway. Operation on a sidewalk is also prohibited (MCL 750.419).
A bicycle equipped with either an electric or gasoline motor meets both the definition of Motor Vehicle, MCL 257.33, and Moped, MCL 257.32b, and is subject to state laws and local ordinances applicable to motor vehicles rather than those governing the use of bicycles.
However, to be registered as a Moped, the bike must meet the equipment requirements noted at the following link: http://www.michigan.gov/documents/sos/SOS-430_Moped_Certification_290967_7.pdf
So, basically, there is no registration provided by law and it is up to the local law enforcement, if they will allow you to use the motorized bicycle on the streets or whether they will enforce the letter of the law.
You may access all of Michigan's law at : www.michiganlegislature.org
If you have other questions, feel free to contact us at 888 SOSMICH (888-767-6424).
Sincerely,
R. Baker
Department of State Information Center
[THREAD ID:1-YYTD1]
-----Original Message-----
From: [email protected]
Sent: 7/24/2012 10:17:37 AM
To: "SOS, DSIC" <[email protected]>
Subject: Corbin Bates - FW: Question/Comment from Contact the Secretary of State (ContentID - 25634)
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Saturday, July 21, 2012 9:57 PM
To: SOSWebMaster
Subject: Question/Comment from Contact the Secretary of State (ContentID - 25634)
name: Corbin Bates
email: [email protected]
email: [email protected]
topic: My question or comment is about
comments: Hello, I would like to know the rules/laws about putting a gas engine on a pedal bicycle and what I need to ride it on Michigan roads? If it is legal what size engine can it have and what else will it need?
Thank you,
Corbin
MGCtBY