Mobility scooter

I got a new one secondhand from a woman who lives five miles away. Yesterday I drove it out on rough pavements. Scooter has solid not pneumatic tyres so no suspension at all. The juddering was bad! I wanted to try it out on a severe down slope and through chicanes. Both were okay. When I came home I bought an inflatable seat cushion from ebay for suspension I hope, and also a year's insurance mainly for third party.