The only way i could get more power out of my WR was to put a pipe-master pipe on put 450 reed and jet in it changed the magneto to a smaller cemoto one. always run on premium fuel and change sprocket´s I´ve got 13 on front and 43 on back i can now get around 170 kmh out of it but at that speed the bike is a real dog you have to get your wheels balanced or it jumps around everywhere especially on tar