Honda CRF150R

The Honda CRF150R is a racing dirtbike that was released in 2006 for the 2007 model year. It competes in the Mini Class against many 85 cc (5.2 cu in) two-stroke bikes; however, it cannot race in the 85cc mod. or stock class. It must race in the Supermini class.[1] All of Honda's 2008 models are four-strokes whereas in years past, some of their racing bikes were two-strokes. The 150R features a powerful Unicam four-valve liquid-cooled engine that produces impressive power at a wide RPM range that only weighs 43.6 pounds. With its fully adjustable Showa suspension, high-quality Dunlop Tires and disc brakes front and rear, this is one of the best mini racing bikes Honda has made. The CRF150R come in two versions: the regular and the Expert.

Honda CRF150R
ManufacturerHonda
Production2007–present
PredecessorHonda CR85R
ClassMotocross
Engine149 cc (9.1 cu in), Liquid-Cooled, single-cylinder, four stroke
Transmission5–speed manual
SuspensionFront: 37mm Showa Fork
Rear: Pro-Link Single Shock
BrakesFront: Single 240mm disc
Rear: Single 190mm Disc
Tires70/100-19. Rear: 90/100-16
Rake, trail27o48'
Wheelbase50.6 in (1,290 mm)
Seat height32.8 in (830 mm) (small wheel); 34.0 in (860 mm) (big wheel)
Fuel capacity1.14 gallons
RelatedHonda CRF250R
Honda CRF150F

The Expert costs an extra $100 and offering several new features specifically for larger riders. Features include a taller seat height, higher ground clearance, larger wheelbase, increased tire size, longer swing arm and larger rear sprocket for better acceleration with a heavier rider. All of these Expert features only add an additional 4 pounds. This model is referred to as the CRF150RB R meaning Race, and B meaning Big wheel.

Specifications

All specifications are manufacturer claimed.

2007[2][3] 2008[4][5] 2007[6] 2008[7]
Model CRF150R CRF150R Expert (CFR150RB)
Engine
Engine Type 149 cc (9.1 cu in) Liquid-cooled single cylinder four-stroke
Bore/Stroke 66 mm (2.6 in) x 43.7 mm (1.72 in)
Compression Ratio 11.7:1
Valve Train Unicam
Carburetion Keninin 32mm flat side with throttle position sensor (TPS)
Ignition Solid-state CD with electronic advance
Drivetrain
Transmission Close-Ratio Five Speed Manual
Final Drive #420 steel chain, 15T/50T #420 steel chain, 15T/56T
Chassis/Suspension/Brakes
Front Suspension 37 mm fully adjustable leading-axle inverted Showa cartridge fork; 10.8 in (274 mm) travel
Rear Suspension Pro-Link fully adjustable Showa single shock; 10.8 in (274 mm) travel Pro-Link fully adjustable Showa single shock; 11.5 in (292 mm) travel
Front Brakes Single 240 mm Disc
Rear Brakes Single 190 mm Disc
Front Tire 70/100-17 70/100-19
Rear Tire 90/100-14 90/100-16
Dimensions
Rake 27.02 degrees 27.48 degrees
Trail 78.0 mm (3.07 in) 96.0 mm (3.78 in)
Wheelbase 49.6 in (1,260 mm) 50.6 in (1,285 mm)
Seat Height 32.8 in (833 mm) 34.1 in (866 mm)
Ground Clearance 11.9 in (302 mm) Brady 13.3 in (338 mm)
Dry Weight 165.3 lb (75.0 kg) 169.7 lb (77.0 kg)
Fuel Capacity 1.14 US gallons (4.3 l; 0.95 imp gal)

References
  1. http://www.amadirectlink.com/rulebooks/AmateurRules2008.pdf page: 63 (page 33 of 49 of Adobe Reader)
  2. 2007 Honda CRF150R Specifications article from PowerSportsNetwork.com
  3. 2007 Honda CRF150R Specifications Archived 2010-07-24 at the Wayback Machine article from Hondanews.com
  4. 2008 Honda CRF150R Specifications article from PowerSportsNetwork.com
  5. 2008 Honda CRF150R Specifications Archived 2010-07-24 at the Wayback Machine article from Hondanews.com
  6. 2007 Honda CRF150R Expert Specifications article from PowerSportsNetwork.com
  7. 2008 Honda CRF150R Expert Specifications article from PowerSportsNetwork.com
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