This is an old discussion, but I'll bring it up for those who haven't heard of this.
Are all used to running our bikes just fine on a 24:1 or 32:1 mix, but some claim to be able to run on a 100:1 mix using Opti-2 oil. Now I'm still a bit skeptical, but I may have the cajones to try this soon once I've gone through the tank of 32:1 sitting in my garage.
So what could a 100:1 mix do for us? Well, it would mean more gasoline and less oil burning during the combustion process, and it would mean cleaner exhaust.
A warning to those looking to mod their motorized bicycles:
Most, if not all, of the hacks and mods featured on this site were made by individual hobbyists. If you are new to working with 2-stroke bicycle engines, please by aware that there's a possibility that a mod featured on this site could seriously damage your engine. Please don't try any mod from this or any other site unless you fully understand what you are doing. The owner of this blog will not be held responsible for both material and bodily damage caused by performing a modification featured on this blog. Also remember that opening up your engine may void your warranty!