alright so i just jetted my carbs hoping to elimiate some of my ide jumping problem but it didnt help. my idle will jump nearly 500-700rpm on its own if you dont even touch it i have tried to find a vacumme leak but cant. i have no more ideas as to what to do to fix it. it is really giving me a headache.

 

What do you mean "Jetted" your carbs? Like changed the size of your main jet? Because yes, that has absolutely nothing to do with anything related to anything that happens around idle.

Have you tried shooting carb cleaner around the manifold rubbers to check for vacuum leak?

If it's not a vacuum leak, then my guess would be dirty idle jet, sticky float needle, bad float height on one or more floats, or dirty filter/screen under the needle seat.

Good luck.

 

alright thanks i jetted the carbs to eliminate a backfire problem i had and i took care of that.

i have sprayed carb cleaner on the intake boots and to no avail no leak was there.

i cleaned them once but if it has a chance to fix it ill give it another go.
thanks for the help

 

If Gogar's suggestions don't solve it, you could try checking choke operation, or by-starter valve.Get CBR600F manual for more detailsfrom CBRExtreme.com.

My bike has some strangebehaviour:after starting with the choke on, it automatically increases the idle speed to about 2500rpm after about a minute.