Nothing to fear. The shift forks ride on a long spiral grooved drum which has some inertia. If you stomp the gear, sometimes the inertia will carry the shift fork beyond it's intended destination. The various gears are constant mesh with it's mating gear, but are not coupled to it's shaft. The gear, when selected, carries a fixed 'dog' that couples to a sliding 'dog' which is controlled by the appropriate shift fork and is splined to the shaft the gear is riding on. These 'dogs' are like fingers which stick out on the sides of gears and sliders. The reason you have to rock the bike is because the 'dogs' are fairly coarse and don't instantly fit together except when the bike is in motion.
The transmission on your bike is not syncronized like a cars trans. When you are trying to shift from neutral at speed you must slow down to allow the gears to mesh. As far as having to rock the bike into gear sometimes, I have owned eighteen motorcycles of different sizes and makes and have had to rock all of them at one time or another to get them in gear. again lack of syncronization. It really doesn't sound as if you have a problem.
bigc
SOURCE: 2003 SUZUKI GSXR 600 SHIFTING QUESTION
just input , not resolving anything. but i used to have a similar issue with mine, but i had a gs 750t . it has around 20,000 on the clock. sometimes it didnt want to shift into 1st from a dead stop, i had to let out on clutch, then pull clutch again , then it went right in. the gears are so fine cut in the bikes that once they get worn, even the shift fork, it gets a little harder to get into those gears without a little coaxing. by the sounds of it (without knowing the mileage) i dont think id worry too much. especially if its shifting up and down through gears without grinding of any sort. if the clutch is ok on it (being an 03) i assume its still touchy , ull be ok
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issues shifting between 2nd & 3rd gears. Shifter sticks in 2nd and I can't downshift unless I upshift to 4th and then back down to 2nd. Sometimes I have to start from stoplight in 3rd gear and then upshift/downshift to get the gears working correctly. Especially happens when I shift quickly to get speed up merging onto highway. Then this issue is most pronounced.
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