Have you pulled out the fuel pump and looked to see if the pickup filter appears to be free of junk? Pump sounds strong when 1st turned on? Stock fuel cap with stock vent hose? Or those shorty ones with aluminim valve things?
2018 YFZ450R SE : warning labels removed, TMD case saver, GYTR aluminum frame skid with the bracket mod, thick helicopter tape here and there, some stickers, everything else stock stock stock like the dealer likes it.
PIN IT PIN IT !!! SCREW BREAK IN STEPS.
On deck.circle: VORTEX ECU/PEAK RACING MOUNT - YOSHI SLIP ON NO SPARKY.