Well, I bit the bullet and did it. Not too loud at all! I haven't taken it around the block, but it seems like it started much more easily and has better throttle response when I rev it.
"At each stop, fill up the oil, and make sure to check the gas."
2006 Yamaha XT225
Gone but not forgotten:
1990 Kawasaki ZX6D, 1990 Honda VFR750F, 2008 Kawasaki EX250J, 2005 BMW F650GS (Single)