Introduced in 2013, the CRF450R racing machine features an aluminum frame with an innovative suspension package and a strategically engineered compact dual-muffler exhaust system that tucks in closely to the center of mass. Every element in the CRF450R chassis has been focused on attaining a low center of gravity along with class-leading mass centralization. According to Honda, the 2014's intake and exhaust ports, new Dual-Timing fuel injection and redesigned muffler internals boost torque output and increase throttle response. In the suspension department, revised internals in the KYB PSF® (Pneumatic Spring Fork) yield improved damping response for improved bump performance. As before, the advantages to the KYB PSF include significantly lighter weight since it uses air in place of traditional steel springs, and the design also allows incorporation of a larger 32mm cartridge damper piston for improved fork action.