first, let me thank everyone who offered advice concerning my late oil leak, especially Gerard (3rd914), and Kevin (Rhodyguy). you helped with my understanding of how this crazy little 1.7 liters of fury works!
anyway, i invite Dino (dinomium) over to the house to help paint my living room ceiling. i bribe him with beer and food. he comes over and, after thinking a bit about the oil leak (he was probably sick and tired of me whining about it), he suggests disconnecting the breather pipe and covering it with a little air filter lookiing thingie. guess what? no more leak! apparantly i was pressurizing my crankcase. now to find some ways to route the vent tubes to the little teeny carbs, and all will be good.
Dino is, like, some sort of 914 whisperer or something...