Flooding?

I have a 1999 YZ-125. Got in a trade a couple years ago. Blew the lower rod bearing. Put new crank, main bearings, seals, gaskets, rod, piston, ring, etc... Ran perfect for a month or so. Sat for a weekend, suddenly won't run for more than a second (literally), then seems to flood. I take the plug out dry it off throw it back in and get the same thing, a second of fire and dies.

Fuel is good (running 32:1), compression is good (150-160), spark is good, float not sticking, carbs clean, jets clean, intake's clean, reed valves good.... :bang:

Any advice appreciated.