I have a 98cc minibike (4 stroke) engine. I don't know if its possible to get power from the engine at all or not, but I would like to be able to charge my batteries on the bike. I have four 7.2v nicads, two in series for my headlight and two in series for my brake light. If I could find a way to charge them on the bike, that would be great. I have 26" wheels, and my top speed is somewhere around 32mph. I was thinking maybe a bottle generator if there is one that won't fry from the speeds I go, or maybe someone could give me some advice on building something diy? Just please don't recommend something like a dynamo hub, or the kubota generator, as I don't have that kind of cash right now. Its got to be inexpensive and able to hold up to the engine speeds. Thanks.