How do i change an oil filter on a 89 Yamaha yfm 250?

On the right hand side of the engine, behind the round part of the case that sticks out with the plastic "YAMAHA" badge on it, and directly above the rear brake pedal linkage, there's a round cover with three allan head bolts holding it on. Remove these three bolts. Pull the old filter out. On the new filter, there will be one end with a solid round rubber gasket on it. On the other end, there will be a rubber washer with 4 slots in it. Put the end with the slots in it in first. Put the cover back on and tighten up the bolts. Put your drain plug in and make sure it's tight. Put 2.1 Liters of oil in the motor and you're good to go.