On his website Dale Walker advices against a K+N filter with 2G 1200 with the jet kit. I have his stage 1 kit (hole in box, timing advance) with stock can. He says on 2G bandits the stock filter is actually the best. It must be true, because otherwise he would make more money by selling you the filter as well, but being honest he is not doing that. I finally sorted out my 2003, but I agree that it is not easy to tune. Dale was a great help.