I came across this website the other day that sells "fuel fragrances" that are added to racing fuel to produce scented exhaust that help mask the nasty smell of burning fuel. The scents you can buy include "Atomic Apple", "Burn Out Blueberry", "Rippin' Root Beer", and "Victory Vanilla"! Though personally, I'd probably want to give my exhaust a minty smell, though it doesn't seem like they have that as an option. Butterscotch would be pretty awesome too!
Some people find the idea of adding scent to your exhaust to be a "fruity" idea, but I think it's rather funny and I certainly wouldn't do it all the time.
But do these work with our little china girls? I haven't tried it out, and I'm not sure anyone else has. If you have any input, join the conversation at motorbicycling.com!
UPDATE: Pirate Cycles sells strawberry-scented oil that works in our 2-stroke engines!
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!