Yours is most likely the second illustration above. All three of the drain plugs take the same size socket. You can re-use the washers. Warm the bike up. Loosen the oil filler cap. Drain the center plug first. Then pull the other two. You can have all three plugs out at the same time, assuming your drain pan is wide enough. Reinstall the drain plugs. Snug them up good, but don't overmuscle them. Then change the filter. Put in four quarts of oil (motorcycle oil!). Then start the bike and let it idle for 15-30 seconds, checking for leaks. Shut the bike off and add one more quart. Start the bike and let it idle for 30 seconds or so. Shut the girl off and sit on the bike with it in an upright position and check the oil level. Add up to a fourth of a quart as needed. Ride safe!