2013 Honda CRF450R, Go faster, for longer. - Go faster, for longer. That’s what the amazing new Honda CRF450R allows you to do, thanks to its completely re-engineered chassis and improved engine performance. An all-new aluminum frame ensures a low centre of gravity and optimum mass centralization, and it’s mated to a new KYB PSF (Pneumatic Spring Fork) that delivers significant weight saving plus improved performance and versatility. At the back, a compact KYB shock that sits lower in the frame is connected to a brand new aluminum swingarm. The changes to the fuel-injected engine are equally exciting: a new cylinder head with larger exhaust valves, increased compression ratio, a heavier flywheel, a reshaped airbox, a new dual-muffler exhaust and other improvements add up to major gains in the low-end and midrange with no loss of top-end power.