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Hi , can anyone advise , got hesitation on my gsxr 1000 k9 , at 2500-3000 rpms , had it for a long time , ive checked everything ,changed plugs etc , my thoughts are that when I removed twin cat & fitted single akrapovic exhaust , and put k&n air filter , ive upset , setup , can any one give advice , or any thoughts , thx.
 

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Did you add any kind of fuel controller? I noticed a flat spot not hesitation when it was in stock skin after removing the stock cat for a dual M4 I didn't have a hesitation but it id run a little lean. I would add a fuel controller of some kind being as though you removed the cat.
 

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Hi , can anyone advise , got hesitation on my gsxr 1000 k9 , at 2500-3000 rpms , had it for a long time , ive checked everything ,changed plugs etc , my thoughts are that when I removed twin cat & fitted single akrapovic exhaust , and put k&n air filter , ive upset , setup , can any one give advice , or any thoughts , thx.
Check the fuel pump and then the EXCV. Odds are high that it's one of them
 
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