OK, I’m a newbie and I recently got a 1989 FourTrax 300 (2wd). I just changed the oil and I want to drain the final drive and replace that oil simply because I don’t know how long it has been since that was done. So here is my stupid question: What tool do you use for the drain plug on the final drive. I cannot see the plug, but feeling it with my finger I don’t feel any corners like I would expect. It feels round. Is there a special tool? If not, what size socket should I use? I told you it was a stupid question. Thanks in advance!