Stig,
I seem to be the only dissenter.. I tried Dyna beads and saw no difference in anything, except that the scooter was very slightly harder to push around the shop. In my book they are a waste of time and money.. I ended up breaking the tire bead, pushing the bead down away from the rim, and slipping the flat attachment of my shop vac into the space between the rim and the bead, sucking them out, and throwing them away.. they are all marketing hype IMHO. Apparently only one man's opinion though.