What cam/springs are you running? You could be floating the valves easily.

Or maybe the stock (I'm assuming) fuel lines aren't large enough to flow that kind of fuel for 9000 plus rpms. Do you have any kind of logger for it?

probably needs more fuel pressure, injectors might not be able to say open long enough at that kind of RPM so they shut down

I have no idea what the stock airflow capabilities of the Honda MAS are or how much air you are flowing, but it sounds similar to DSM fuel cut.

Honda's are all MAP based, so you can't outflow that.

Could be floating valves like Joe said, not all that likely unless your valve springs really suck.

Could be a bad distributor cap/rotor or a bad ignition coil.

Could be 50 thousand other things.

I'll never understand people that don't buy datalogging equipment for their modified EFI cars.

yeah wtf is up with them

I'm hoping you are running some really really good plugs. Missfire rates start to really climb at that RPM.