I'm close to buying this exhaust, BUT

[metallyguitarded_imp]

I've continued in my research on the topic of ECU reflashing and Dyno tuning. What I've come away with so far is that generally speaking, you only need one or the other. Once ideal AFRs have been determined for a particular model bike, those settings can be downloaded onto the reflashed ECU along with all the other adjustments that a reflash can provide - removing speed limiter, increasing rpm range, decreasing engine braking, etc. Those AFRs have to come from somewhere though. Most bikes have maps available from a Dyno tune that can be used by someone like Don Guhl for the reflash without having to put your bike on a Dyno. In that case, you don't need to run a PC-V (or any other similar fuel management unit).

If, however, you happen to have a bike that hasn't had a map developed yet, someone like Don can guess as to the appropriate map to download onto your ECU. Hopefully, that works out fine. However, if you want to be sure it's right or you want to fine tune it so it's specific to your bike, then you'll need a fuel management unit and Dyno tune in addition to the reflash. The same is true if you make major engine modifications after a reflash.

My plan is to have a map developed for the 2014 CB running a Yoshimura RS-3 slip- on. That map will then be available for download to any PC-V unit through Dynojet. If I decide I want to reflash my ECU for the other benefits that provides, I will have Don use the map developed for my bike and at that point won't need to run the PC-V any longer unless and until I make any other big changes such as going to a full exhaust and high performance air filter.

I plan on asking a lot of questions at Dynojet and I'll continue to share with all of you what I learn.