I found the solution for my motorcycle and the scooter.
Most motorcycle dollies won't work on a scooter because the centre stand is located too close to the rear wheels and scooters have a rear weight bias.
I found a Canadian guy that makes scooter dollies. $200 Canadian
These dollies have Side Rails to make sure that the scooter will NOT slide off the edge when moving sideways. There is a rubber pad on the platform to reduce movement. They use wide tread casters to make the dolly roll easy. 2 of the Casters have locks on the wheels. The scooter dollies have a Baked-On Powder Coat finish for durability.
They have been designed to handle up to 1200 lbs.
