I HAVE A 2002 HONDA CR 80 AND IT HAS A HARD TIME GETTING ON THE PIPE I RUN IT AT 50.1 AND THE CLIP I PUT IT TO WHAT FMF SAID TO BUT IT STIL AT TIMES HAS A HARD TIME GETTING ON THE PIPE SOMETIMES IT RUNS GOOD THEN SOMETIMES LIKE ITS SICK IT MAKES IT HARD TO RIDE I HAVE TRYED EVERTHANG ONE THANG I DONT NO HOW FARE DOES THE SET FOR THE MAIN JET GO IN THE CARB