Carb rebuild falls flat on open throttle

Have a 1993 HD Sporster 883 with 1200 installed. It sat for 1 year. Did not idle well but ran good open on throttle. Bought from CV performance:Carburetor Rebuild Kit - Harley CV Carburetor, Harley Idle Speed Screw, Harley Carb Premium Tuners Kit, (Select Model: Sportster XL 883 to 1200 conversion 89-06) CVP Velocity Needle, (Select Model: Sportster 883 or 1200 conversion 89-06), Harley Velocity Emulsion Tube, Stainless steel float bowl hardware, Accelerator pump cover screws, already has high flow elbow. Cleaned carb and installed new parts. Put 45 & 180 jets. Now it idles great and revs up great sitting still, but at 45 mph/1/2 throttle and more it sputters and then shuts down but will restart and idle fine. Tried the 175 jet no help. It did have a 180 jet when we started. Any help on where

Does it shut down because it's running out of fuel or is it flooding??

Lucifer is on the right track, not enough or too much fuel. Doe's it fall off at easy cruising speed? or after you hit the throttle then it falls off when carb fuel level gets low? If it was flooding you should most likely get some dark smoke or rich smell on restart.

If it was flooding out at 1/2 throttle...you'd definitely smell gas...
Could be fuel restriction,like gas cap not venting right or peetcock partially plugged or float set too low...

Got it fixed. Appears the petcock was clogged. After cleaning it out the bike now runs great now. Thanks for the help.

Good deal, enjoy.