MF- (that just doesn't sound like a good abbreviation!)
I'm pretty sensitive to the bike's power, surge, and related behaviors as mine has a technical problem with strong surging at high temps, high altitude, which I can't get identified.
If you've got the throttle barely cracked and are cruising along, the oxygen sensor and ECU are continuously hunting for the 'right' fuel mixture [ie, lean]--you can notice the ever-so-slight sensation as cylinders don't fire. Pdfruth has hooked up a scope to this part of the bike's circuit and he says it is constantly hunting, even at constant throttle. If this is what you are experiencing it is normal, and it feels a bit like the engine management system (which purposely shuts off or turns on cylinders) in a GM V-6 in level, low-power cruise, such as when the cruise control is set. An ever so slight movement of the throttle will change that feeling (but then it does it again). The ST does not have engine/cylinder management, however at very low power the lean mapping is such that it barely fires.
If you're experiencing a strong surging/hammering of power, well that's another issue.