Just picked up a ONE OWNER 86. Cosmetically pretty nice, but been laid up for several years. Battery dead, did not hear it run, but got an outstandingly good price on it. It is turning into a handful! Carburetors, questionable fuel pump, Vboost inoperative, two massively leaking valve cover gaskets, fork seals. The thing that has me most puzzled is that it only runs on the two rear cylinders. Do the two front cylinders have anything in common? The feeds from the TCI appear to be individual for each coil, so that unit might be ruled out. However the pick up coil’s impedances measure in spec, the ignition coils primaries and secondaries both appear to be intact as well. That really only leaves the TCI. Does that sound right? I suppose I could coincidentally have two dead front carburetors, but the slides are working well, they are receiving fuel, but still don’t work either at Idle or up on the mains. I am lucky enough to have a bucket full of spares from previous Vmax’s but I don’t want to start throwing parts at this thing indiscriminately. Trying to put a little science behind it. But this one has me stumped. Any suggestions?