May 10th, 2007
Honda CRF150R Wins Bike of the Year Award

For the first time in 20 years, Dirt Biker magazine, one of the leading off-road motorcycle magazine in the US has selected a model in the mini motorcycle class as the winner of its Bike of the Year award. For 2007, the award goes to the Honda CRF150R. The complete details and review of the Honda CRF150R and other awardees will be featured in the June issue of Dirt Rider magazine.
Why would Dirt Rider editorial staff chose a mini cycle as the Bike of the Year? Well, check out what they have said about the numerous features and benefits of the motorcycle that I got from the Dirt Rider website (www.dirtrider.com). You can also try to install ARP fasteners on your vehicle if you want to.
ENGINE/DRIVETRAIN
- Powerful four-stroke 149cc liquid-cooled four-valve Unicam engine produces impressive power across a wide rpm range for easy-to-control operation.
- Lightweight, compact, internal auto decompression and handlebar-mounted hot-start system provide easy starting, hot or cold.
- Compact, lightweight engine assembly weighs only 43.6 pounds.
- Unicam valve train provides the light weight of a compact single-cam drive and the optimum combustion chamber shape for maximum power at all engine rpm.
- Unicam valve train features a carburized single camshaft that directly actuates two 26mm steel intake valves. The steel 22.5mm exhaust valves are actuated by twin, low-friction rocker arms.
- Crankshaft is made of high-strength, low-carbon steel with carburized main journals for maximum durability at sustained high-rpm operation.
- Forged 11.7:1 compression slipper piston and rings are lighter than a conventional design, revving quickly while maintaining excellent cylinder sealing and high-rpm power.
- Double-carburized connecting rod utilizes a big-end needle bearing for maximum high-rpm performance and durability.
- Nikasil cylinder lining is lightweight and provides cooler operation for extended engine life.
- Press-fitted aluminum spark plug pipe fits between the two exhaust rocker arms, further contributing to compact cylinder-head design.
- 32mm Keihin FCR carburetor features four rollers on the flat slide, resulting in very light throttle effort, smooth operation, crisp throttle response and excellent rideability.
- Carburetor features a throttle position sensor (TPS) that helps maintain a linear throttle response throughout the range.
- Twin-sump lubrication system separates the oil supply for the crankshaft, piston and valve train from the clutch and transmission. This ensures a cool supply of oil to the clutch, eliminates potential clutch and transmission material contamination of the engine oil, reduces the amount of circulating oil and permits the use of a smaller oil pump.
- Vertically split crankcases feature a built-in oil pump, reducing weight compared to a conventional design.
- Exhaust system uses a lightweight stainless exhaust header and repackable aluminum muffler.
- Dual radiators feature a refined core area for improved heat dissipation compared to conventional dual-radiator design.
- Gear-driven balancer reduces vibration and drives the water pump. A six-disc clutch provides the surface area necessary to handle the engine's impressive torque, while carefully matched clutch springs provide a light feel at the lever.
- Durable five-speed close-ratio transmission.
CHASSIS/SUSPENSION
- Front and rear suspension settings unique to the CRF150R deliver ideal bump absorption characteristics.
- All-new handlebar bend optimizes rider position and comfort.
- Lightweight, high-tensile steel frame with large-diameter frame tubing and cross-member provides excellent turning performance and straight-line tracking.
- Box-section aluminum swingarm is lightweight and rigid.
- Removable subframe is strong and durable.
- 37mm leading-axle inverted Showa cartridge front fork features friction-reducing design to improve compression and rebound control.
- The fork offers adjustable compression and rebound settings.
- Wide-section aluminum top and bottom triple-clamps position fork tubes far apart for good turning and control.
- Tapered-roller steering-head bearings for durability.
- Pro-Link rear suspension system features a fully adjustable Showa shock for superb compliance and wheel control.
- Strong, lightweight wheels are durable and minimize unsprung weight.
- Lightweight front and rear disc brakes with high-performance pads offer powerful, precise braking.
- Stout 15mm front and 17mm rear axles incorporate a surface-treatment for added strength and durability.


