You need a Maine state ATV sticker to ride ATV trails in Maine on your motorcycle. Speed limit is 25 mph. 80 miles of smooth rail bed. Watch out for animals (saw deer, porcupine, and rabbits) Were I not dutifully obeying the speed limit I could have easily cruised at 45 to 50 mph on my vstrom 1000. Knobbie tires on big bikes helpful, but a skilled rider probably wouldn't need them if it's dry (I didn't do it in the rain, so I can't speak to wet traction).