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The original YZ250 of 1974 used an air-cooled 250cc two-stroke engine of 70 mm bore and a 64 mm stroke, which was improved semi-annually. The air-cooled motor was replaced in 1982 with a 249 cc liquid-cooled two-stroke reed-valved engine with a mechanical, rather than servo-driven, YPVS exhaust valve for a wider spread of power.
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.
Additionally, the YZF's weight was decreased from its original 250 lb (110 kg) to 233 lb (106 kg). The bike made tremendous power; however, many thought that the bike had too much power for a motocross track. [12] The 2005 YZ450F was the first YZ450F to feature KYB twin chamber cartridge forks.
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]
Today's NYT Connections puzzle for Sunday, December 15, 2024The New York Times
The 2005 model has a constant-mesh, wet, multiple-disc coil-spring clutch. From 1973 through 2004, the YZ125 had a single backbone frame made from steel. It generally averaged from 176 to 198 lb (80 to 90 kg). [citation needed] For the 2005 year, Yamaha switched to a single backbone frame constructed from an aluminum alloy. This frame material ...
Jelly Roll shared more details about his recent dramatic weight loss, saying he used to be a “550-lb. zombie. The singer, 40, appeared on the Dec. 16 episode of wife Bunnie Xo’s podcast, ...
'Today' show star Al Roker got honest about aging, and fans are saying he needs to "take care of himself" after seeing his Instagram.