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  2. Yamaha YZ450F - Wikipedia

    en.wikipedia.org/wiki/Yamaha_YZ450F

    First, the engine displacement was increased with 449 cc in compliance to the new AMA Motocross maximum displacement rule, the engine now produced over 52 hp (39 kW). Next, the frame and plastic were updated for a new, sleeker look. Additionally, the YZF's weight was decreased from its original 250 lb (110 kg) to 233 lb (106 kg).

  3. List of bicycle types - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_types

    The city bike differs from the familiar European city bike in its mountain bike heritage, gearing, and strong yet lightweight frame construction. It usually features mountain bike-sized (26-inch) wheels, a more upright seating position, and fairly wide 1.5–1.95-inch (38–50 mm) heavy belted tires designed to shrug off-road hazards commonly ...

  4. Ridgeback (brand) - Wikipedia

    en.wikipedia.org/wiki/Ridgeback_(brand)

    In 2008, Ridgeback was one of the first to introduce disc brakes to its flat handlebar road range. And in 2015 Ridgeback launched Rapide – a range of performance road bikes. [1] In 2014, Ridgeback was the 5th most stolen bike in the UK. [3] In 2020, Ridgeback Velocity was the 4th most popular stolen bike in the UK. [4] [5]

  5. BMW S1000RR - Wikipedia

    en.wikipedia.org/wiki/BMW_S1000RR

    BMW S1000RR is a race oriented sport bike initially made by BMW Motorrad to compete in the 2009 Superbike World Championship, [1] that is now in commercial production. It was introduced in Munich in April 2008, [2] and is powered by a 999 cc (61.0 cu in) transverse inline four-cylinder engine redlined at 14,200 rpm.

  6. Yamaha YZ250 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_YZ250

    The engine produces a peak 47 horsepower (35 kW) at 8,800 rpm and 30.6 foot-pounds force (41.5 N⋅m) of torque at 7,500 rpm, with a 9,000 rpm redline. [ 1 ] A large range of after-market tuning parts are available, owing to the bike's design being fundamentally unchanged since 1999 and the sheer numbers sold over the last fifty years.

  7. Bicycle performance - Wikipedia

    en.wikipedia.org/wiki/Bicycle_performance

    From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).

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