I wondered the same thing as i enjoy riding mine to work occasionally. asked the same question as you guys have, the answer I got was it was ok as long as some kind of knobby was on the rear. i am riding with Perelli's that are not d.o.t certified. as long as there is some give somewhere between the road and your clutch you should be alright. I will tell you one thing to remember. I am assuming the maintenance schedule is the same on the newer bergs as my 99 fe400. Hrs on the road accumulate fast, and if valve adjustments are 15 hrs apart like on the older models, you'll spend alot of time with a feeler gage in your hand. Again not sure about the new models but on the older ones the exhaust valves aren't easy to get to with the radiator on. If you don't like to maintain your bike at the correct intervals, a berg may not be for you, as valve adjustment and oil changes are critical. I know it sounds like I'm talking you out of a berg, but if you diligent and keep up with the normal maintenance required you won't be sorry. You'll have a bike you'll be very happy with buying, especially off the road.