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i just fixed a fouling problem on my zr750 by finding an air leak. now its difficult to get good acceleration from low speeds no matter how hard or far i turn the throttle.

plugs are fine. i can eventually get up to higher speeds....just takes forever.

and idle screws are 2.5 turns out

is the motor bogging?

Clogged intake/dirty air cleaner or rich jetting could make your bike run like that.