Here's the basics of it: If the stock plug is a 12mm x 1.25 thread/mm pitch, you can tap it out to 1/2-13, then use a magnetic drain plug that you can get at NAPA for about $3.50. That is just slightly oversized from the stock opening, and requires no drilling. Quick and easy fix IF the stock thread is 12mm x 1.25. That is a very uncommon size, and most are 12mm x 1.5 or 1.75 if my memory is correct.
Let me find my link and I will post it back here. What part of town are you in? I'm in Belton, you guys are welcome to bring the bike by and I can give it a go for you. I will need to know my 2PM, though, so I can bring the tap home. Just shoot me an Email or PM.