I'm Heavy, will a 400cc be Okay?

[MaxMe1]

Hello Everyone, Tried a topic search didn't find what I was looking for. I am getting ready to buy a decent used Scooter. My wife has one and we'd like to ride together. I'm 6' 2" , 327lbs. I have some disabilities but they won't prevent me from riding. I decided against
a Motorcycle as it would be to difficult to get on and off. I have been looking at some Yamaha Burgman's, each size. I like the 650 but more expensive and harder to find. I found several 400's and I like a few of them. What do you think with my weight and height? Will the 400 work well for me, are they comfortable and what other brands would meet my needs for comfort?
I appreciate any and all replies.