Hello everyone I have a 2015 zx10r abs.. Only 3900 miles recently it has been surging when i full throttle it but only in gear under a load. In neutral I can rev it all the way to red line. The only mod is a vance and hines slip on exhaust. So far ive changed the plugs(gap=.34) pulled the air filter and replaced that with a stock one. Fresh oil and oil filter. Pulled the injectors and cleaned them. Poured out all the old gas and put fresh 93 octane in. Pulled the fuel pump assembly and Took it apart and cleaned the fuel filter/strainer but didnt replace it. But it looked super dirty had black liquid coming out. No fi light at all. I dont know if its the fuel pump it self or not definitly need help!