Revs Very Slow Returning to Idle Help and Clarification, Please.

[SR-71]

Hello everyone,

Help and a little clarification please

I'm having kind of an unusual problem (or one which I perceive to be unusual) with the 2nd Hayabusa that I just purchased. – 2006 10,000 original miles new fairings. Yoshi dual slip on exhaust

When you release the throttle from revving up in neutral. The rev seemed to drop a lot slower than on my 2007 Hayabusa 100% stock.

Further, I noticed that the idle(very smooth, not missing) will rest at about 1500. Then settle in around 1100 … Instead of directly dropping to 1100 RPMs on a fully warmed up bike

Could this be due to the Yoshi exhaust?… Possibly less back pressure?

Any other thoughts, comments or suggestions will be greatly appreciated.



Yours truly,

SR 71

 

[Bobby914]

Is the throttle sticking?

 

[RedBull]

Is the throttle sticking ?

 

[SR-71]

Hello Bobby 914, & red bull

I would like to thank both of you for taking the time and investing the energy to respond to my request for help.

The problem seems to have been solved with the combination of replacing the fuel pump (low fuel pressure), and re-synchronizing the throttle bodies

Best regards,

SR 71