I'm buying a wr450 soon and trying to educate up on FI. I understand I'll want to uncork the bike and play with maps until I find what I like. What I'd like to know more about is CO settings. What exactly are we doing guys when changing this? My mind tells me the altered CO setting is just the byproduct of the real change. Raised CO levels tend to come from other than ideal combustion.. I'll buy the ECU and tuner but i want the dealer to set my CO as part of the deal. Sounds like I'll benefit from being up around the 8 mark or more. When I ask him to get his fancy tools out to carry this out I'd like to know what exactly is happening. Any help? Thanks.