The 2009 Suzuki QuadSport Z400 ATV is one of the best all-around trail machines. Even with the new wave of 450 quads, we know the little Z400 isn't done yet, so we threw real-world mods at it to bring some new life. Read the full story in our 2009 Suzuki QuadSport Z400 Project ATV.The 2009 Suzuki QuadSport Z400 ATV is one of the best all-around trail machines. Even with the new wave of 450 quads, we know the little Z400 isn't done yet, so we threw real-world mods at it to bring some new life. Read the full story in our 2009 Suzuki QuadSport Z400 Project ATV.