Reaching out for maybe a dumb tip to help get my bike right. This is my first french build to this extent. The issue I'm having repeatedly is I can get about 1/4 mile down the road about 0-53 mph then I'll fuel starve regardless of float height, gas cap on or off and jetting.
My set up is polini av10 race cases
Factory 4 petal
21 phbg matched intake
Parmakit 74cc air cooled
Gianelli 97mm pipe
Ere clutch less variator
Ere clutch less pulley
Le parti at 1.1 btdc
Red engine spring
With an inline on off 1/4" fuel shut off
Fuel is flowing, I have no air leaks, everything on the build is fresh, I've tried 3 different carbs, 2 complete different ignition set ups new out of box, different plug boots, different coil wires, played with float heights, played with jetting and filters as well as no filter. Is a fuel pump something I should try? Any other recs i should try? I'm just tryna rip this bike. Any tips are appreciated.