Not doing the CO, in the short term, may have high consumption levels and feel the smell of gasoline in the event that the bike is too fat, according to how ? set the CO. The adjustment of the CO ? recommended after replacement of the ecu and the exhaust, why? you must adjust the right mixture of air and gasoline permit? the bike works well! The JPDIAG by chance? adjust the trimmer of the CO (be careful not you are adjusting the CO), this trimmer should be used in combination with a gastester, which measure the stoichiometric ratio of the mixture, which should normally be between 3.5% and 4%, with the trimmer of the JPDIAG you can adjust this percentage, but only if you know where to parts.