2006 Ulysses Misfires/Dies When Riding

[Haligonian21]

Certainly not a new topic, however, and having followed much of the advice in these posts - I'm still stumped. Issue is that the bike will burp and cough after riding for about 20 minutes (3000 RPM range) then ultimately cough one last time and come to rest!! Thereafter, the check engine light comes on and she refuses to start until its had time to cool down for at least 30-40 minutes. ECMSpy does not bring up any current/historical codes even after I plugged it in when the bike last failed and was in the "won't start" phase. The bike is stock less an EBR race ECM I switched out after the OEM one failed (crack in body). I've inspected the ECM and there are no signs of wear/fractures in the body. In addition, I've checked all grounds both under the seat and at the cabling behind the front fairing. Interestingly, at an idle she'll run all day and the fan activates when it's supposed to come on (monitored on ECMSpy). Again, not sure where to go from here, any suggestions would be most greatly appreciated.

 

[DualSportDad]

race ecm is throwing too much fuel at the engine and has caused to o2 sensor to go bad.

here's a video where my o2 was lazy. i know you say yours idles find but mine did to until i reset the afv.
https://www.youtube.com/watch?v=WBn0wa9gtp8&list=UUroCETMgj19p-3A5xwLxn3A

here's a video after replacement.
https://www.youtube.com/watch?v=zzPnFnUJVV0&list=UUroCETMgj19p-3A5xwLxn3A