Rotax check list is a good place to start. A minor service would be 50 hr oil change.dont forget allow time for safe tying, magnetic plug inspection, cut and inspect oil filter, write up log book, clean up etc. But if on the other hand this becomes more of an annual, expect a lot longer. Unless you know what you are doing, best to find someone you can trust to do the service, expect to pay reasonable rates, quite a bit of time involved in paperwork, checking SB's etc