I haven't seen that method before. Thanks for posting the link. Can't figure how pumping the lever didn't do the job on a scooter. Does it have ABS or linked brakes or some other complexity in the braking system?

My Yamaha motorbike has ABS brakes and it's a bear to bleed. The ABS unit is under the seat, so the front brake lines run from the lever back under the seat, then up to the front of the bike and split to the calipers. The best way I've found to bleed it is to put the caliper bleeder under vacuum with a Mityvac, and then use the pump-the-lever approach. If you don't use both pressure and vacuum, air bubbles collect in the vicinity of the ABS unit and you end up with mushy (if clean) brakes.