We drag 1/4 mile asphalt Banshee's. The Cubs are DRAG ported right out of the box. The power band comes on like a light switch at just over 7000 rpm and they pull HARD but low and midrange isn't impressive. They're a great strip motor but I wouldn't even consider a cub for trail. You'd be WAY better off with a lower, wider powerband. A "peaky" high rpm motor on the trails is not a fun bike to ride.....