Well its a 2 stroke so it pulls, I think you'd get going a little faster that 20 MPH, plus its a full sized dirtbike, same size as a 250/450
I forgot the smiley face. Yes I'm sure it'd do better than 20 MPH. My daughters CB500X tops out at about 80 MPH with me on it. I use to ride a Yamaha 250 back when I was younger and healed faster when I'd dump it.
I like my road couch now, cruise & music & heated seat & grips. But it still goes fast when I want to push it a little.