I've never noticed anything. That's not to say it couldn't happen, but it would have to be a partial tank, say 3 gallons, and that's 25-30lbs shifting...

4 1/2 gallons, Aluminum, no baffles. Electric transfer pump, with switch on battery box which carries a car battery behind the tank. Built and set up ...

So I'm a little late to the party...just signed up today. IMO, you will need a spare wheel that you can attach either the front OR sidecar rotor ...