Got it figured out. Needed to pull the met to access the coolant bleed screw. Since I didn't want to pull the front fairing to remove the overflow i just sucked the coolant out(pneumatic oil extractor) and poured some distilled water in several times to clean it out well. Once I drained coolant via the 8mm drain bolt(making sure radiator cap was removed) I re-installed drain bolt and filled radiator with distilled water. Bled the air out. Snugged up bleeder, put on radiator cap, fired it up to operating temp then opened up drain and let it drain again while pouring distilled into radiator until the drain was clear. Secured drain again then filled radiator with coolant. Opened bleeder again to get the air out once again. Tightened bleeder again and topped off radiator. Left cap off and started again. Air purged out of filler neck while I revved engine as fluid level dropped a bit each time. When burping stopped i put the cap back on and cleaned up. Start to finish maybe 20 minutes. Easier than my p250.
Windshield removed with allens, pop open panel to expose radiator filler neck, left high foot rest pad pop off, remove small latch to expose over flow container and pull met box to expose engine to get to 8mm bleeder. Water pump drain for coolant is next to oil filter on right side of scoot.
I used Supertech concentrate(safe for aluminum engines) and diluted 60/40 with distilled water. Made up 1.6 qts. Once radiator was filled I dumped almost all of the rest into the overflow until it was a little over halfway between the lines on the bottle. Took for a 12 mile drive with some 70mph on a highway and temp is perfect. I'll still watch it over the next week.