I've got a '04 CBR600RR here that is having some serious issues with the throttle.

When you hit the throttle, it waits aproximately 1-2 seconds before responding. No matter if it is from 1000rpm's through 4-5k rpms. It just hesitates real bad.
[:'(]
The list of modifications that I'm aware of include a full Yoshi RS5 exhaust, PC3 usb, and a BMC filter. It has a custom map from Iron Thunder. I replaced the map (saving of course) with the map from powercommander.com to see if it helped. Did not make a diference.

I enabled the fuel accellerator on the map and played with the % of fuel and found if I put the fuel change at 50% and the revolutions at 20 it completely fixed the problem. But anything less or more if was worse or just plain horrible. I know this is not the correct fix, but worked for a day. Then it is right back to where it was. You just hit the throttle from an idle and it just sits there for a second or two and then jumps up in revs. It does not sound like it is bogging or studdering. It just has a MAJOR delay on throttle responce. It has not been like this, it just started last week.

Help! I'm going crazy with ideas and no clue.

Thanks

PS: I guess I should give more information about the throttle responce:

It hesitates no matter the gear, in neutral or not. If you are cruising along at 1/8th to 1/4th and grab a load of throttle in 1st-6th. It will stop completely then jump and damned near break your neck.

 

Start w/ this check the coolant temp sensor, map sensor, throttle postion sensor. Does the bike act like this when at normal operating temp? How many miles on the bike?

 

Check small stuff too had a car did that fuel filter was colapsing when the throtle was hit and then letting fuel through after a second. No exp with PC3 so I wouldn't know about anythinglike that.

 

It has 8k miles and it does the hesitation no matter if hot or cold. I will look into the sensors and fuel filter. Thanks!!!