Established in 1992, Sumai Bicycle Co.,Ltd. is one of the biggest China honda dirt bike manufacturer and wholesaler. We've gotten the WMI (World Manufacturer Identification) since 2005. Our company has perfect quality management systems with ISO9001 international quality authentication in 2002 and pays great attention to new product development. We have high-quality staff at design, oem honda dirtbike development and production fields, and have introduced in qualified personnel from foreign bicycle enterprise. Most of our products have been approved with CE certificate, and some approved with EEC, EPA and CARB.

Updates for the bigger two strokes are limited this year, it seems all the R+D dollars go into the four strokes these days. The 250 is running a 38mm Mikuni carby, 5 speed transmission and 47mm USD Showa forks up front with a Showa fork out back. The 125 has a 38mm Mikuni carby, 46mm Kayaba USD forks and a Kayaba rear shock. Dry weight for the 125 is 197 pounds, gone are the days when four stroke race bikes were so much heavier than their two stroke counterparts. Honda's award winning motocross flagship continues to go from strength to strength. Updates for '07 include changes to the cylinder head and intake valves. The carb diameter on the 450 has been increased to 41mm and there is also a new brake lever linkage and rear subframe. Showa components take care of suspension front and rear.

Model:CRF450R. Engine: 449cc liquid-cooled single-cylinder Unicam four-stroke. Bore and Stroke: 96.0mm x 62.1mm. Compression Ratio: 12.0:. Induction: 41.0mm Keihin® flat-slide. Ignition: CD
Transmission: Close-ratio five-speed. Final Drive: #520 chain; 13T/48T. Front Suspension: 47.0mm inverted Showa® cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4-inch travel. Rear Suspension: Pro-Link® Showa single-shock with spring preload, 13-position [low-speed] and 3.5-turn [high-speed] compression damping and 17-position rebound damping adjustability; 12.5-inch travel. Front Brakes: Single-disc with twin-piston caliper. Rear Brake: Single-disc. Front Tire: 80/100-21. Rear Tire: 100/90-19. Rake: 26.76 degrees. Trail: 111.4 mm (4.3 inches). Wheelbase: 58.6 inches. Seat Height: 37.6 inches. Ground Clearance: 13.4 inches
Curb Weight: 238 lbs. Fuel Capacity: 1.9 gallons, including .07 gallon reserve. Available Colors: Red, Black.

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