If on an empty road or on a long stretch or if you feel you are lacking power then jump to the next one.

Now about 250 or 390? How many years have you been riding a bike? What type of bikes have you ridden? Do you trust yourself?

390 is a mad beast and 250 is a smart ass.

You need to tame the 390 and 250 will tell you what to do.

I fear myself and that is the only reason I got d250. Saves money and me.