I have a '99 GSX-R 600, it did run fine til today. Its got a real bad jerky hesitation when its rpms are between 2-3k. So bad i'm surprised i did not come off of it when going from a stop. And now even when cruising down the road, no matter the rpm range, i can let off the throttle and then very slowly get back on it and there goes the jerking process. But if i get on it the entire time it will not happen, just when i'm trying to take it easy and plus some. Its hard to explain, and i wish i could do better. But its very aggravating. Thanks, Daniel

Just a guess, perhaps your stock steering dampner came loose or fell or something happened to it. Again just taking a guess. Maybe i don't understand the problem fully