Unfortunately, the world is overrun with jerks. Since us MB riders are good people, we deserve some protection. MBs are probably as vulnerable as a vehicle can possibly get, and there's always the chance of some junior high school kid from putting dirt or sugar in our tanks. My car has a locking gas cap, and so I thought why not have one on our bikes as well!
These are very hard to find, but apparently there's a site that sells these locking gas caps for mopeds that may also fit our stock teardrop-style tanks.
UPDATE: The locking gas cap from ScootUSA reportedly works with the stock teardrop fuel tank.
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!