That's interesting

Bike runs OK at high speed map hoses are relatively new as is the fuel filter I forgot to add there is good pressure at the fuel rail also as for the squirrel me thingies I had a spare in my bedside draw lol you know what they say about fellas with little feet... Well it ain't true! Thinking back around the time I put the injecters in a back street dyno knock shop type place the filters were not changed I know for a fact it only ever had an oil and air filter changed in its life until I got my hands on it all else is up to date including every 0 ring in the motor, so Im hoping that dirt in there was down to the last filter, like you say and it does sit well at high speed hopefully that ruled that out