recently purchased a honda 599 from another state. was originally from a high altitude state. noticed it was running rich, pulled plugs-wet. pulled filter-strong gas smell. So I figured on installing aftermarket exhaust anyway so I thought if it is already rich adding open pipe and k&n filter will even it out. Today installed pipe. still waiting on filter and D shape socket to adj fuel-air mix. started bike to test drive and it only idles on full choke, dies with any input. I cant believe just that mod would effect so much.... any ideas? Was hoping to not have to take to a tuner but maybe it will be money well spent.