Throttle hesitation

[Mark1340]

Hello all . My busa seems to bog down a little.when riding my k9 busa with full yoshi R77 PCV&kN race filter&map from speed to slow going down the gears rolling of the throttle when I slightly roll the throttle on again it appears to hesitate (bog down) a bit.it's due for it's 7500 mile service soon.could it be the play in throttle cable any ideas.thanks from the uk