*Non Valk* son's Ninja 250 bogging down

[dubsider]

It seems to be getting worse..
Bike starts just fine but the choke is required and needs several minutes to warm up to want to "go".. just recently now once rolling it wants to hesitate and bog down when you really want to get on it and now wont run over 55mph (bike hesitates and bogs severely). This bike should cruise at highway speeds pretty easily at 8-9000+ RPM.  He runs premium (10% ethanol).  the last 60 days the bike has only been on the road 2-3 times due to my son's surgery (I would take her for a spin to keep the fluids running).. WE have a fresh tank of gas in it.  I did have the seat off to fix a blown fuse (any vent line issue possible)...

Any direction the braintrust here on VRCC can provide me would be greatly appreciated.

[22Dasher]

Its starving for fuel you either have a clogged fuel line or filter.