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  2. Honda XR250R and XR250L - Wikipedia

    en.wikipedia.org/wiki/Honda_XR250R_and_XR250L

    In 1984, the bike was introduced with Honda's Radial Four Valve Combustion Chamber (RFVC). [citation needed] It has a 110 kg (240 lb) claimed dry weight, [1] and a 36-inch seat height (96–04). Honda claims the engine produces 28 horsepower at 8000 rpm and 17 ft-lb feet of torque. The 1996–2004 versions of the XR250R had 10.6 inches of ...

  3. Motorcycle components - Wikipedia

    en.wikipedia.org/wiki/Motorcycle_components

    There are tires designed for dirt bikes, touring, sport and cruiser bikes. Dirt bike tires have knobbly, deep treads for maximum grip on loose dirt, mud, or gravel; such tires tend to be less stable and noisier on paved surfaces. Sport or performance tires are designed to provide maximum grip for street use on paved surfaces but tend to wear ...

  4. Suzuki PE series - Wikipedia

    en.wikipedia.org/wiki/Suzuki_PE_series

    Some of the changes: dog-leg levers, folding tip for gear and brake levers, new sprocket cover and larger side-stand foot. Improved chain guide (nylon blocks). PE250Z also only available in very few countries. Dog-leg levers, folding tip for gear and brake levers, new sprocket cover and larger side-stand foot. Improved chain guide (all nylon ...

  5. Motorcycle transmission - Wikipedia

    en.wikipedia.org/wiki/Motorcycle_transmission

    They are much less common than motorcycles with conventional manual transmissions, typically use a centrifugal clutch, and are mostly found on smaller motorcycles, such as minibikes, underbone (step-thru) motorcycles (e.g., the Honda Super Cub), smaller dirt bikes (such as pit bikes), and various (mostly older) mopeds and motor scooters. Semi ...

  6. Yamaha WR450F - Wikipedia

    en.wikipedia.org/wiki/Yamaha_WR450F

    The Yamaha WR450F is an off-road motorcycle made by Yamaha Motor Company.It currently has a 450 cc (27 cu in) liquid-cooled single-cylinder engine. First offered in 1998 at 400cc, it shared many components and design concepts with the YZ400F motocross model.

  7. Sprocket - Wikipedia

    en.wikipedia.org/wiki/Sprocket

    A multi-speed bicycle, by providing two or three different-sized driving sprockets and up to 12 (as of 2018) different-sized driven sprockets, allows up to 36 different gear ratios. The resulting lower gear ratios make the bike easier to pedal up hills while the higher gear ratios make the bike more powerful to pedal on flats and downhills.

  8. Honda CT90 - Wikipedia

    en.wikipedia.org/wiki/Honda_CT90

    The bike was ideal for climbing and carrying packs. The four-stroke engine was quiet and almost all models were equipped with spark-arrestor exhausts. While targeted at off-road users, this was not a dirt bike in the conventional sense. It could be registered for road use, having a top speed in high-ratio road gear of around 55 mph (89 km/h).

  9. Yamaha YZ450F - Wikipedia

    en.wikipedia.org/wiki/Yamaha_YZ450F

    The bike had an 11,600 rpm redline [8] [better source needed] power and torque close to its 250 cc two-stroke rivals. [1] It benefited from engine compression braking, which allowed the engine to slow the bike down during deceleration, giving the brakes a rest. [1] The 1998 YZ400F was the first bike to come stock with a Keihin FCR carburetor.

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