The CRF450R’s Programmed Fuel Injection (PGM-FI) settings contribute to the engine’s strong low-end torque, remarkable top-end power and generous over-rev capability.
Extra-strong transmission gears enhance durability while delivering smooth, sure shifts.
Close-ratio, five speed transmission
Completely new Unicam cylinder head design uses finger rocker arms, oval cross-section valve springs, bigger intake valves, and increased valve lift to boost horsepower and allow a higher rev limit.
By straightening the intake path, reducing valve angle, and revising both combustion chamber and piston shape, engineers were able to improve flow and increase compression ratio for an even bigger power boost.
A new scavenge pump system with no separate oil tank improves engine lubrication, reduces friction, and requires less oil for reduced overall engine weight.
Final Drive : #520 T-ring-sealed chain; 13T/49T
More power, more torque, higher rev limit... the CRF450R’s Unicam engine has been radically improved to get you out front right from the drop of the gate. And keep you there.
The CRF450R’s Engine Mode Select (EMS) system lets you modify fuel-injection and ignition mapping with the simple push of a handlebar-mounted button. Choose between Standard, Smooth and Aggressive to dial in the best power curve for better starts, better drive out of corners, better traction, or simply to better suit your riding style. Mode selection is easily accomplished without changing your hand position or shutting down the engine (as long as the engine is idling).
Shorter for 2017, the CRF450R’s twin-muffler exhaust system not only contributes to the engine’s exceptional power characteristics, it’s also positioned tightly to the frame’s centre to take weight off the rear end and optimize mass centralization for improved handling.
Not only is the CRF450R’s improved twin-spar aluminum frame lighter for 2017, its torsional stiffness has been reduced to give you more feedback and to improve turn-in and corner-exit performance, without giving up high-speed stability.
Thanks to the new frame, revised swingarm location, centralized rear shock, and other improvements, the CRF450R boasts a lower overall centre of gravity and a shorter wheelbase for 2017. Both contribute to the type of precise handling that wins motos, and championships.
Easy to tune to match changing track conditions or your riding style, the CRF450R’s new Showa coil-spring fork was developed to work in conjunction with the improved chassis for enhanced traction, agility and stability.
A new front fender and reshaped tank shrouds increase airflow to the radiators, keeping the engine running at peak efficacy from gate drop to checkered flag.
Dunlop MX3S tires offer excellent traction in a wide variety of conditions.