Thanks for info "Streido" about 1000rpm torque spring and 5.5g rollers.
I AM VERY NEW to scooter world, so excuse me folk.
I have seen on youtube mentioning about scooters have gears, if its a twist and go, where is the gears, if rollers does all the tensioning of the belt to do the drive.
Can some-one explain or video about this confussion, please.