Specs

From the dealer's page

Your Trophy Awaits. There’s big news for 2015: an all-new Engine Mode Select button lets you choose between three settings (Standard, Smooth, and Aggressive), just by pushing a handlebar-mounted button. It's an industry first for MX bikes, and it's going to make tuning your bike for changing track conditions a snap. With our available HRC Fuel Injection Setting Tool, it’s easily adjustable to specific track conditions and refines your settings in place of the smooth and aggressive settings on the engine mode selector. Next, the CRF®450R's revolutionary KYB Air Fork features new high-speed / low-speed compression and rebound damping, letting you dial in the CRF450R's suspension in much quicker. The new exhaust port header design and compact dual exhaust further enhance mass centralization. And the new head design provides more top end power and over-rev. Plus, there’s stronger transmission gears, a new piston, more flywheel mass, a new rear shock that's easier to adjust and a new 260 mm front brake lets you haul down all that speed with more stopping power. The list just keeps going on.