Yo cooter.... some times I think you are way to nice. Got a couple of things to throw at you and food for thought..
Harleys and Buell’s are very simple and almost problem free unless you don’t maintain... I.e change fluids or try to modify it with cheap parts or work on it without real mechanical knowledge.
So, let’s talk about this mess of a post...
I’m sorry to say buddy you put the cart before the horse and honestly fall into a person without the mechanical knowledge...
Why did you take the heads and cylinders off? Why did you mess with the valves? Xb heads a bullet prof unless you drop something down the intake. They will last longer then the bottom end.. I’ve pulled Buell head off and done leak down tests on them with 80-90,000 miles and they still pass.
Now let’s talk all the problems with what you have done and what to kinda check over..
first get ecm spy and a cable check codes then do simple prime test to check that to see if the pump works, injectior etc.
Then spray carb cleaner to see if the on the motor to see if the rpms change.
Then go down the list.
intake leak
Valve leaking
Head gasket
TPS reset
Fuel pump
Injectors seals
Cam position sensor
Throttle body leaking
Timing
As a starting point.
But, not to sound bad you should probably get rid of the bike. Parts and real know how about Buell’s are starting to disappear and it might cost you more in time and money to fix what you have done then it would be to buy another bike.