Changing the gear oil on a two-stroke is one of those maintenance jobs that looks intimidating until you actually do it—then you realize it’s pretty straightforward. In this video I’m working on my 2025 Yamaha YZ250 and walking you through the whole process from start to finish: getting the bike set up, cracking the drain bolt loose, letting everything drain (including the residual stuff that likes to hang out), and then buttoning it back up the right way. One big thing I call out is how I like to set the bike up for this job: I use a triangle (not a bike stand) so it’s stable and I can get to what I need without it wobbling around. Then I refill with fresh gear oil and go over the part that can bite you if you’re not paying attention—BEWARE OF THE OIL CHECK BOLT. If you’re new to working on your own bike, this is a quick win that keeps your clutch and transmission happy, and it’s the kind of simple routine that makes riding more fun because you’re not stressing about what’s happening inside the cases.