This guy claims to be able to run his 49cc bike engine on E85 fuel, which is 85% ethanol and 15% gasoline. Many people think that ethanol can ruin your engine, so I don't recommend trying this just yet unless you have an extra china girl to spare. Supposedly you have to use a larger jet in your carb, and the guy in the video says he added Marvel Mystery Oil to the fuel. It's not clear what kind of 2-stroke oil he's using, since I believe the only oil that will dissolve in ethanol is pure ester-based synthetic 2-stroke oil. Whether or not it's really currently possible, I'd love to be able to run my 66cc engine on mostly ethanol!
Join the discussion on using ethanol with bike engines at motoredbikes.com!
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!