Battersea, You should map the bike, any filter which removes the stock system is so far different it is not funny. I have tested this set up and out of courtesy am awaiting an email back from Dan at Ramair before posting results. As to the PCV pulling out fuel with the AT, it will pull out all your accelaration fuel,when you give it the berries. Thats why your map makes numbers on the A Tune. Results are good for the Ramair on a stock engine, good option for those who wish to retain the bearclaw on their bike. There is nothing wrong with a PC if set up well. Better to have a well set up PC than some dodgy tune from some one half way round the world, using different fuel, air filters etc etc.