i had the same thing in and it dissappeared when i cleaned the airfilter (K&N) awhile ago. the sputter has slowly returned now after 7000Km. it's not as bad as it was before i cleaned the filter , but it's there again :( i think it's because i had the PC and K&N filter installed and dynotuned at...
has anyone tried to install R1 swingarm to FZ6?
Maybe the linkage difference would be less, and perhaps you could do fine with the R1 shock then?
Just a tought.. Also it would be interesting mod beacause you could propably keep the underseat exhaust, which is not the case with R6 swingarm, and...