[BrooksZX3]

it's not trouble, I know exactly what you mean. I had it installed on my red zx3. The bursts or surging if you will are related to the increased (by almost double capacity) air flow so what you're feeling is improved throttle response - big time. As for the play in the pedal, I never experienced that, it was instantanious for me so I would also check the idle screw. There is a great deal difference in the tension of the spring attached to the throttle cable. I also found it very tough to drive right away, very jerkey because you're used to depressing the pedal a little harder or further or whatever. Totally different feel, but as you get used to it you'll find it awesome... except in stop and go traffic <_<