First Look - 2007 Honda CRF150R

First Look - 2007 Honda CRF150R

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Honda has been busy introducing new models to their dealers, and they had a little surprise for everyone—a pair of new 150cc four-stroke mini-class warriors (in standard and big wheel (expert) versions. This is a serious race bike, with a base MSRP of $4,199 for the CRF150R, and $4,299 for the Expert. Here are all the features and benefits and specs supplied by Honda.

2007 Honda CRF150R / CRF150R-Expert Features 

Torrance, Calif. 09/06/2006 -- In keeping with the revolutionary CRF450R and CRF250R, Honda's new CRF150R and CRF150R-Expert four-stroke motocross machines are destined to redefine the small-displacement motocross category.

Features & Benefits


  • 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 close-ratio five-speed transmission.


  • Front and rear suspension settings unique to the CRF®150R 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.

Additional Features

  • Large-capacity airbox and reusable two-stage foam air filter.
  • Lightweight plastic body components (radiator shroud, sidecovers, rear fender, seat base, fuel tank, front fender and front number plate) offer a slim, aggressive style.
  • Seat-cushion foam follows the shape of the fuel tank, providing a smooth transition to increase rider mobility and comfort.
  • Non-slip seat cover for increased rider control.
  • High-quality Dunlop tires.
  • HRC works-type rear-brake system integrates the rear master cylinder and fluid reservoir, eliminating the separate rear master-cylinder reservoir and hose.
  • Adjustable front-brake lever and master-cylinder assembly are the same as CR®125R/CR250R components.
  • Stainless-steel clutch cable for long life and improved feel and action.
  • Works-type handlebar grips add to rider comfort.
  • Purchase of a new, previously unregistered Honda unit by an individual retail user in the United States qualifies the owner for a one-year complimentary membership in the Honda Rider's Club of America® (HRCA®). Benefits include online access to the Honda Common Service Manual, six issues of the bimonthly Honda Red Rider™; magazine, travel discounts, trip routing and MSF reimbursement, plus access to the HRCA Web site ( Look for the HRCA support team at select off-road events across the country. For details on the HRCA, dealers should call (310) 783-3958, 8:30 a.m. to 5 p.m. Pacific Time.

CRF150RB-Expert / CRF150R

Engine Type:

149cc liquid-cooled single-cylinder four-stroke

Bore and Stroke:

66mm x 43.7mm

Compression Ratio:



Keihin 32mm flat slide with throttle position sensor (TPS)


Solid-state CD with electronic advance


Close-ratio five-speed

Final Drive

CRF150RB: #420 chain; 15T/56T
CRF150R: #420 chain; 15T/50T


Front: 37mm fully adjustable leading-axle inverted Showa cartridge fork; 10.8 inches travel
Rear: Pro-Link fully adjustable Showa single shock;
CRF150RB: 11.5 inches travel
CRF150R: 10.8 inches travel


Front: Single 220mm disc
Rear: Single 190mm disc


Front: 70/100-19
Rear: 90/100-16
Front: 70/100-17
Rear: 90/100-14


CRF150RB: 50.6 inches
CRF150R: 49.6 inches

Rake (Caster Angle)

CRF150RB: 27o48'
CRF150R: 27o02'


CRF150RB: 96mm (3.85 inches)
CRF150R: 78mm (3.07 inches)

Seat Height

CRF150RB: 34.1 inches
CRF150R: 32.8 inches

Ground Clearance

CRF150RB: 13.2 inches
CRF150R: 11.9 inches

Dry Weight

CRF150RB: 169.7 pounds
CRF150R: 165.3 pounds

Fuel Capacity:

1.14 gallons



Consult owner's manual for optional racing parts.

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