Random Lean conditoin

[racer_X1]

Sunday my bike started to randomly run lean (Race ECU... I have an AFR gauge to keep an eye on things). I don't even know what search terms to use to find this issue. I haven't notice any sure fire trigger for it to happen. Anyone have any thoughts on what may cause this?

 

[AZmidget91]

I would check fuel pressure

 

[AZmidget91]

Or intake seals, is your wideband just in the rear?

 

[racer_X1]

Yeah... just in the rear. I'll check the (new) intake seals... It's the intermittent nature of the issue that has me baffled.