has a light, well a little sign that comes up on the digital read out. top speed, well standard pipe, take out the 2 restrictions, rejet the carb (otherwise you will kill the bike) and go up on the front to a 13t sprocket and will do about 55 top end, cruise all day doing 45, thats mph. you could to what i did and get a power pipe. gianelli make a nice one.