Can anybody help, I have a cbr 929 When applying throttle and as I hit 6000rpm i have a real bad flat spot, like a limiter. But will accelorate past and then fine up past that. I have removed the cables from the power valved and locked it open but not helping
please help.

Thanks...Nathan

 

Did you pull out the flappy thingy in the airbox
did you just remove the h-vix it may take the ecu a few rides to adjust to the better exhaust flow.
Has it got a pc on it more info needed mate

 

Hi Sj66, Thanks for the reply,
No i havent pulled out the flappy thing in the airbox i just removed the cables from the exhaust valve, left the cables attached above and just cable tied them to the fairing. i locked the valve fully open.
I have just ordered a pc3 today and will arrive shortly.
I have installed a custom made twin Termi exhaust and the problem started then.
im hoping i can download a map from dynojet to match my exhaust and k&n filter.

Any more info would be great.....

 

929's and 954's do not respond well to K-N filters. The stock filter performs better than the K-N. As for the htev your bike will run much better with it installed and working properly. Only time to remove/disable is when putting a full exhaust with custom tune. Otherwise you are hurting the low-midrange power by locking it in the open position. My 954 has a working htev but I did remove the flapper in the airbox since it is only there to decrease intake noise for emissions control.

 

I concur the htev is real important for up to 8000rpm's it's what gives you that midrange

If you are getting a pc get it dyno'd and all will be sweet.
The standard ecu will make allowances (for intake and exhaust changes) but a custom tuned pc should fix all

 

Thank you all for your help.
I have now installed a pc3 and all is well. best it has ever run in fact. I would recommend it to all.

Thanks again....