Well, i pulled the carb, took off the float bowls, and checked the floats. They're the nytrophyl foam type, so no pinholes to wory about. the primary sat much lower than the 7/16" specified when upside down. The secondary was right at 13/64". It doesn't have secondary idle mixture adjustment screws, and the secondary bowl's gasket is shared with the metering block that bolts inside it. since i had to order the gaskets, i'll have plenty of time to clean everything before i get it back together. hopefully fixing the float height will get me on the right track.
now, i have to admit that i'm feeling a bit guilty about how long all this has taken. since i have very limited know-how and therefore won't be repaying the debt in knowledge any time soon, i hope some pretty pictures will suffice. i'll start with one i took of my neighbor's new ride today (well, new within the last six months). This is for all of you who have spent so much time and patience on me. Thanks.