2007 Yamaha Big Bear 400 IRS 5-Speed 4X4, HAS NEW WINCH AND VERY LOW MILES!!! COME SEE IT TODAY!!! - JUMP RIGHT IN, THE MUD'S FINE. With new four-wheel independent suspension, rugged semi-automatic, a high-tech sealed wet brake out back and ITP Mud Lite rubber, the new Big Bear 400 4x4 IRS is ready to take on the mud.