In the Netherlands the laws and rules do not allow to build your own motorized bicycle. It is illegal tot do so and you cannot insure your bike. So, i'm a bit jealous at you guys in the US. In the Netherlands we have a motorized bicycle category, called "snorfiets", translated in English "snoaring bicycle", that won't and may not go faster than 25 km/h. I'm going to try to put together a cruiser bicycle and the 30 cc 2-stroke rear engine of a snoaring bicycle. For the headlights i'm going to use an old carbidlamp, where i will put ledlamps in. Any suggestions for a fuel tank?