How do you change oil in a dirt bike?

The way i change my oil is i start my bike for about 10 minutes to get the oil warmed up. After the oil has drained from the plug hole give it a couple of slow kicks over with the kill switch off (so the bike wont start) to push out the remaining oil.

after you have drained the oil, you'll want to change the filter(s) too. you can buy steel oil filters which can be re-used after they are clean. if you plan on doing regular maintenance, these are worth the money (~$30-$40). some bikes have oil screens in the oil circuit which need to be cleaned as well. compressed air does the trick.