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The Yamaha WR250F is an off-road motorcycle made by Yamaha Motor Company.It has a 250 cc (15 cu in) liquid-cooled single nikasil coated cylinder engine. First offered in 2001, it shared many components and design concepts with the YZ250F motocross model.
The Yamaha WR250R is a dual-sport motorcycle made by Yamaha Motor Company. It has a 250cc (15 cu in) liquid-cooled single-cylinder four-stroke DOHC engine, fed premium fuel by electronic fuel injection. [3] It has remained largely unchanged since its introduction in 2008, with most differences being cosmetic. [4]
The first bike manufactured by Yamaha was actually a copy of the German DKW RT 125; it had an air-cooled, two-stroke, single cylinder 125 cc engine [1] YC-1 (1956) was the second bike manufactured by Yamaha; it was a 175 cc single cylinder two-stroke. [1] YD-1 (1957) Yamaha began production of its first 250 cc, two-stroke twin, the YD1. [1]
The Yamaha YZ250F is a motocross motorcycle first released in 2001 by Yamaha. It features a DOHC , four-stroke engine and initially had a steel frame and subframe in 2001–2002. In 2003 it received an aluminum subframe, which was replaced in the 2006 model with an all-aluminum frame.
The 2005 WR weighed in at 244 pounds dry, the seat height was reduced to 38 inches and the fuel tank was decreased to 2.1 gallons. [1] [4] The 2006 WR weighed in at 249 pounds dry [1] and produced 42 horsepower. [5] A limited production version of the WR450F was the WR450F 2-Trac, which featured 2-wheel drive.
Yamaha engineer Yoshiharu Nakayama first came up with the idea of creating the first competitive four-stroke race motocross bike. [6] The Yamaha YZ400F was developed to fit into this category. It solved the power dilemma by borrowing superbike technology and giving the YZ a five-valve head, liquid cooling and a 12.5-1 compression ratio.
The Yamaha TT-R250 is an entry-level, trail bike that Yamaha produced from 1999 to 2006 [5] to compete with the Honda XR250R. The TT-R250 was equipped with electric start, [ 3 ] and was designed to be reliable and long-lived.
The Yamaha SR250 is a single cylinder motorcycle made by Yamaha Motor Company initially from 1980 to 1984 and then 2001 to 2004 for a second generation. It shares styling with the larger Yamaha SR500. The first generation had a 249 cc (15.2 cu in) displacement and the second generation was 239 cc (14.6 cu in).