Honda's all-new 2009 CRF450R Motocrosser gets fuel injection

- Powerful advanced 4-stroke 4-valve Unicam engine churns out 41.5kW of power at 8,500rpm and 50.3Nm of torque at 7,000rpm. Power is produced across a broader rpm-band for smoother, easier operation.

- Liquid-cooled 449cm³ Unicam engine pumps out nearly 92.4kW per litre while retaining its legendary simplicity and dependability.

- Innovative Unicam valve train provides both the light weight of a compact single-cam drive and an optimum combustion chamber shape for maximum power at all engine speeds.

- Unicam valve train features a single carburized camshaft directly actuating two 36mm titanium intake valves. The new cam link type decompressor executes valve-lifting by causing the plunger that is built into the camshaft to push the rocker arm on one side. This contributes to the overall compactness and light weight of the design by integrating decompressor and camshaft weight.

- Lightweight titanium intake valves permit use of smaller valve springs and reduce overall engine height. Intake valve design has been revised for better mass centralization.

- Forged slipper piston is lighter than conventional designs, for quick-revving response while maintaining excellent cylinder sealing and high-rpm power.

- Lightweight Ni-SiC cylinder lining ensures cooler and quieter operation for extended engine life.

- Auto decompression and hot restart system make starting easy in all conditions.

...continued