My 98 gsx-r 600 revs up real high upon first starting it (like 6-8000)

After a few seconds or revving it up the idle will drop to 1500

What could be causing this?

 

damn thats a good one, sounds like your needle is way too rich, i don't know too much about bike motors but on a carbureted car it would be the accelerator pump, but i think the needle is the equivilant to that, either that or the floats too high

 

???? probly not, check for binding cables(both throttles/choke ) or somthing int. in the carbs(like a leaking needle and seat)- "After a few seconds or revving it up the idle will drop to 1500" you revving it, or it revs itself down?

 

"you revving it, or it revs itself down?"

I think both ways will kick it down .. but me revving it will fix it immediately

 

sounds to me like one of your choke pulls are sticking open and loading up on startup.

 

anyone kno why a bike wont run or start with the choke on but will always with it off ?