Tuesday's good, I have the day off too.
I remember starting a thread on here about power jets and how they operate, as mine had no soleniods (pipes were open), and the jets were not blocked off.
I think the outcome was that the soleniods were closed at low rev's and open at high rev's. So on mine is was like them always being on line. Bike ran absolutly fine like this.
So, having no X piece would be like having the solenoids open and would run rich at lower rev's if anything, and run normal at high rev's.