Re: Important Choices - Please Give Me Your Opinion
The IL law regarding low speed electric and gas bicycles doesn't say anything about horsepower or displacement. The only limiting factor is that the machine needs to have a top speed of 20 MPH on a flat road with a 170 lb rider.
So technically, the gas kits are not legal, unless you gear your sprocket for high torque and low speed. But the law it written so sloppily that it's highly unlikely that you'd be ticketed unless you're going faster than 20. Get a speedo and watch your speed when the cops are around. Carry a printout of SB0236 with you at all times, and be prepared to explain it to any officer.
There are some municipalities that have stricter laws prohibiting these vehicles, so do your homework.
If you're going to get a two stroke, and want to ride it regularly for a long time, it might not be a bad idea to invest in a second engine only and another CDI, just to keep on the shelf in case of horrible failure. They're cheaper to buy whole than it would be to wait for and install specific parts when something breaks. Maybe a carb, too. Really, for that price, buy a whole second kit.