I’ve passed a ride of theirs. Got 12 or 13 of them in full tuck on 600s and 1000s thru hocking. I was on my dirt bike with street tires sitting upright waving. They were definitely topping their abilities out, not sure about topping bikes out.
Wheelies.
2nd gear
light pressure on rear brake
clutch it up with about 2000 extra rpm
stay steady on the throttle and use the rear brake to control the height