Sure, the TRX450ER makes huge horsepower. But it also handles with a confidence-inspiring predictability that lets you have fun with that power. Its 449 cc four-valve Unicam engine comes from the awesome CRF450X enduro bike, but it has been carefully adapted for ATV use with a special piston and camshaft and a heavy-duty clutch. To make sure you can put all that power to good use, the TRX450ER boasts a lightweight chassis with a racy cast-aluminum swingarm, double-wishbone front suspension with fully adjustable Showa shocks, and powerful, predictable disc brakes front and rear.