What size is the oil drain plug? I thought I'd be set with a set of 7-20MM wrenches, but I can't get the 20MM on there.
See the old message thread
What size socket for engine oil drain plug? (http://www.gstwins.com/forum/viewtopic.php?t=7514)
The consensus is that it's either 17mm or 21mm, depending on the model year.