Originally Posted by AdvGa
If you can hit Red Line, with no problems, then the Fuel Filter should be a problem.
I think the Carb Venting at high speed is where it is happening.
I am tempted to go with a catch can to stabilize the airpressure on the vent sys. I had a similar effect on the EXC when I put the catch can, more consistant venting(until the catch can got a load of gas in it...)