Your hitting fuel cut with a fuel cut defender?
Is it wired in right?
is it a standard ct9 you have replaced it with? you shouldnt be hitting fuel cut realy, what other mods do you have??
Modifications
front mount
trd plugs and leads
hks superdragger ex
de-cat
that it for now
im suprised your hitting fuel cut to be honest, you using the standard mani and airbox? but as said witha little creep you could hit it fuel cut. rrfpr and fcd as already said may help mate.
With those mods i guess you would be creeping abit like i did.
So you will need an FCD and a Fuel Pressure Regulator setup at the rolling road.