Here's a couple of links for you to start reading.
Our search feature can provide you with pages of discussion on any subject related to motorized bicycles. Just type in a key word or words and you'll have plenty to read.
Here's what I got when I typed in '4 stroke trike' > http://www.google.com/cse?cx=partner...ike&gsc.page=1
As for laws, we have a section titled 'Laws & Legislation'. You might try browsing through it and see what other Illinois or Michigan members have discovered.
Happy reading and I hope this helps you a little.