Yes, a 400. This thing "yanks!" (Trying to start a new word/trend.) It gets attention wherever it goes, and sticks in the corners like no one's business. The larger 600's are surprised to see this little naked bike keeping up! If you ever find one with low miles for the right price, grab it. You won't be sorry...just ask anyone who owns one! (See links below.) Also, a pic with it's new Solo seat!