Clutch, I doubt it would be a catch on the carb levers because unless they both caught by the same amount, the engine would idle roughly (cylinders out of sync). Perhaps the barrel splitter could get caught on something over the engine/under the tank, but any internal hang ups would probably make the throttle lever stiff and quickly lead to a broken throttle cable
My bike has experienced the same high idle issue since I replaced the Bosch Crack-o-matic with a Dyna brown coil.
And Mike, I think Monte suspected a sticky bean can when he asked if the timing was correct. I remember a post on this issue a while back where he said something to the effect of "more often than not you will find that turning down the mixture screws fixes your sticky bean can issue." I've heard that carb problems are usually electrical... sometimes it's fun getting the inverse
