Thanks, Seumas.
Erv: I dodged a couple bullets with a couple women, & the only kid involved wasn't mine so no problems there.

Getting the motor upstairs might be a problem, though, & it's just way too likely that my landlord's son would see me doing it.... I may have actually been in Chenango County a few weeks back. Went to a friend's country house somewhere in that general area, anyway. I may actually be moving about 80 miles SSE of you in a year or 2, but we'll see what happens with that....
LRH: Thanks, that's about what it feels like.
The local indie shop can fit my bike in on Wednesday. (I think literally, as in "there will be space in the shop then.") I'm looking at a couple hundred bucks to pull the head off & see if it's cracked, & another couple hundred to put it back together with a new gasket if it isn't. Wish me luck!
Also, if anybody's looking for parts let me know! I'll either be selling off spares to cover the repair bill or doing that other thing I really don't want to do, depending on whether it's the gasket or the head....
Cheers,
-Kit