Sounds like a secondary problem too me, A pump shot issue will be an "abrupt" stumble then clear fast if the rest of the metering is on track, You need to play with the springs in the secondary pod, It sounds like its coming in too quick, so its a lean bogg, I also agree with street, you really shouldn't need alot of pump shot. The temp is also too high at 200*, at least try & have it at 170* in the box, I normally leave at no more then 180*, but i try & keep the carb as cool as possible, another thing, When it starts heating up outside & your engine is on the warm side, It will run richer then in cool air, so IMO, increasing the pump shot may worsen the 60ft. But i think its in the scondaries.