I'm sure there are fuels around, but there's not much in the way of actual mining going on as best I can tell. So, water power, and there's solar power - which, despite the many storms would be an option if we could figure out an easy way to convert it and store it. Like, from the reading I've done most vehicles ran off of gasoline, they also had coal power and nuclear - but that was all before you know this... There was a library and I found a book on engines while I was trying to figure out the tech. Anyway, I think it might be possible to figure out a way to do solar energy. You'd be limited to sunny days, but if you could store enough of it on the speeder, you could get at least short distances. I think it's totally doable, and I've been sort of working on trying to get panels that might work - but it's hard going cause of the size, and also the weight. We need something light enough the speeder would actually still work and that's been an issue.
Well, and by speeder, I'm thinking you might need to use actual wheels because of the repulsorlift situation.
Sorry... I'm rambling. It's been a long day and I talk too much about mechanical stuff. But apparently I don't really matter enough to talk about for other people.