I sent a message to the Ministry of Transportation Ontario inquiring for the details, and just got back a reply, which includes this paragraph: A bicycle on which a gasoline engine has been installed is a motor vehicle, but because it is not a motor vehicle which has been certified to federal standa...

Here is another article where the MTO & Waterloo Regional Police have responded http://www.therecord.com/sports-story/2564795-motorized-bike-rider-left-with-a-fine-mess/[quote]Officials from the Ontario Ministry of Transportation and Waterloo Regional Police say theyre illegal motorized cycles....

Relevant cases R. v. Davies, 2013 ONCJ 639 (CanLII): http://canlii.ca/t/g21vw R. v. Ryan, 2012 BCPC 67 (CanLII): http://canlii.ca/t/fql0c R. v. Kulbacki, 2012 ONCJ 532 (CanLII): http://canlii.ca/t/fshj3 R. v. Pizzacalla, 2013 ONCJ 31 (CanLII): http://canlii.ca/t/fvxv6 R. v. Pizzacalla, 2013 ONSC 77...

I think you answered your own question. I didn't think there was an exception for under 50cc. You will be treated as a moped. I know someone who was charged with no license, no insurance, no valid permit. Looking at the HTA at http://www.e-laws.gov.on.ca/html/statutes/english/elaws_statutes_90h08_e...

I'm considering buying a strap-on motor for a bicycle for this summer, such as the one at http://www.motorizedbicycle.ca/bicycle-engine-kits/grubee-skyhawk-gt5a-66cc-angle-fire-slant-head-bike-motor-kit.html . However, I haven't been able to find any clear answers about what part of the law, if any,...