Yamaha Dirt Bikes And Their History: Specs On The 2010 Range The history of Yamaha dirt bikes began way back before you were just a twinkle in your ol' mans eye. The Yamaha Corporation was founded in 1887 by Torakusu Yamaha. They originally built pianos, then over the years branched out into a wide range of products including all types of electronics, musical instruments, computer products, home appliances and even robotics. To this day you can still recognize Yamaha's strong musical roots by its logo which consists of 3 interlocking tuning forks.It was Genichi Kawakami, the current CEO of the Yamaha Corporation, who made the decision to utilize the companies engineering skills and expand into motorized devices. By August 1954 the Yamaha YA-1 was complete. It was a two-stroke 125cc road bike. July 1955 Yamaha Motor Co L.t.d was founded. It now had its very own dedicated factory called the Hamakita Factory of Nippon Gakki. As you can see, the Yamaha dirt bikes of today have changed just a tad since the Flintstones-styled DT-1! Some Of The 2010 Yamaha Dirt Bikes
SPECS: Model: YZ450F Engine: 449cc liquid-cooled DOHC 4-stroke; 4 titanium valves Bore Stroke: 97.0 x 60.8mm Compression Ratio: 12.5:1 Fuel Delivery: Yamaha Fuel Injection (YFI), Keihin® 44mm Ignition: CDI Transmission: Constant-mesh 5-speed; multiplate wet clutch Final Drive: Chain Drive Suspension/Front: KYB® Speed-Sensitive System, inverted fork: fully adjustable, 12.2-in travel Suspension/Rear: KYB Fully adjustable single shock; 12.4-in travel Brakes/Front: Hydraulic single disc brake, 250mm Brakes/Rear: Hydraulic single disc brake, 245mm Tires/Front: 80/100-21-Dunlop D-742FA Tires/Rear: 120/80-19-Dunlop D-756 Dimensions: Length: 86.3 in Width: 32.4 in Height: 51.6 in Seat Height: 39.3 in Wheelbase: 58.7 in Ground Clearance: 15.0 in Wet Weight: 245 lb Fuel Capacity: 1.6 gal
SPECS: Model: YZ250F Engine: 250cc liquid-cooled DOHC 4-stroke; 5 titanium valves Bore Stroke: 77.0mm x 53.6mm Compression Ratio: 13.5:1 Fuel Delivery: Keihin FCR MX37 Ignition: CDI Transmission: Constant-mesh 5-speed; multiplate wet clutch Final Drive: Chain Drive Chassis: Suspension/Front: Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel Suspension/Rear: Fully adjustable single shock; 12.0-in travel Brakes/Front: Hydraulic single disc brake, 250mm Brakes/Rear: Hydraulic single disc brake, 245mm Tires/Front: 80/100-21 Tires/Rear: 110/90-19 Dimensions: Length: 85 in Width: 32.5 in Height: 51.3 in Seat Height: 38.9 in Wheelbase: 57.7 in Ground Clearance: 14.8 in Wet Weight: 224.8 lb Fuel Capacity: 1.7 gal Hats off to Yamaha for continuing to make two-strokes!
SPECS: Model: YZ250 Engine: 249cc liquid-cooled 2-stroke; reed-valve inducted Bore Stroke: 66.4 x 72.0mm Compression Ratio: 9.2 – 10.9:1 Carburetion: Keihin PWK38S Ignition: CDI Transmission: Constant-mesh 5-speed; multiplate wet clutch Final Drive: Chain Drive Chassis: Suspension/Front: Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel Suspension/Rear: Fully adjustable single shock, 12.4-in travel Brakes/Front: Hydraulic single disc brake, 250mm Brakes/Rear: Hydraulic single disc brake, 245mm Tires/Front: 80/100-21-51M Tires/Rear: 110/90-19-62M Dimensions: Length: 85.7 in Width: 32.6 in Height: 51.4 in Seat Height: 39.1 in Wheelbase: 58.3 in Ground Clearance: 15.0 in Wet Weight: 229 lb lb Fuel Capacity: 2.1 gal
SPECS: Model: YZ125 Engine: 124cc, liquid-cooled, 2-stroke, reed-valve inducted Bore Stroke: 54.0 x 54.5mm Compression Ratio: 8.6-10.7:1 Fuel Delivery: Mikuni TMX 38 Ignition: CDI Transmission: Constant-mesh 6-speed; multiplate wet clutch Final Drive: Chain Drive Chassis: Suspension/Front: Speed-sensitive system inverted fork; fully adjustable, 11.8-in travel Suspension/Rear: Fully adjustable single shock; 12.4-in travel Brakes/Front: Hydraulic single disc brake, 250mm Brakes/Rear: Hydraulic single disc brake, 245mm Tires/Front: 80/100-21 51M Tires/Rear: 100/90-19-57M Dimensions: Length: 84.1 in Width: 32.6 in Height: 51.8 in Seat Height: 39.3 in Wheelbase: 56.8 in Ground Clearance: 15.2 in Wet Weight: 208 lb Fuel Capacity: 2.1 gal KIDS YAMAHA DIRT BIKE
SPECS: Model: YZ85 Engine: 84.7cc liquid-cooled 2-stroke; reed-valve inducted Bore Stroke: 47.5 x 47.8mm Compression Ratio: 8.2:1 Carburetion: Keihin PWK28 Ignition: CDI Transmission: Constant-mesh 6-speed; multiplate wet clutch Final Drive: Chain Drive Chassis: Suspension/Front: Inverted fork; fully adjustable, 10.8-in travel Suspension/Rear: Single shock; fully adjustable, 11.1-in travel Brakes/Front: Hydraulic single disc brake, 220mm Brakes/Rear: Hydraulic single disc brake, 190mm Tires/Front: 70/100-17-40M Tires/Rear: 90/100-14-49M Dimensions: Length: 71.7 in Width: 30.9 in Height: 45.7 in Seat Height: 34 in Wheelbase: 49.5 in Ground Clearance: 13.8 in Wet Weight: 156 lb Fuel Capacity: 1.3 gal If you are interested in the full range of Yamaha Dirt Bikes then check out
www.yamaha-motor.com
An excellent place to find some great deals on Yamaha dirt bikes is Ebay Live Auctions. Click on any of these below to find out more.  Subscribe to Monthly Dirt and lighten up your day once a month! This e-zine will definitely make you laugh with a bunch of interesting and sometimes weird articles and links... Monthly Dirt will also keep you informed on additions and changes I've made to the site, plus offer a brief summary of what's happened around the world with the pro's...What Do You Think About Yamaha Dirt Bikes?Have you ever owned a Yamaha? Maybe a vintage Yamaha? Tell us what you think of the four stroke range. Do you know of any design faults or problems with particular models? Maybe you have a mechanical tip to share...
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But it wasn't until 1968 that the first Yamaha dirt bike was produced. The DT-1 was a two-stroke 250cc Enduro bike and was claimed to be the worlds first true off-road motorcycle. It was an exciting and hugely successful bike... and the USA couldn't get enough of 'em!
