Search results
Results from the WOW.Com Content Network
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. Although other ...
This page was last edited on 17 December 2022, at 09:35 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Yamaha YA-1. YA-1 built August 1954, produced January 1955. 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]
The TZR250 was still raced in the Yamaha Past Masters race series with the British racing club as of 2024. [4] Racing engines are currently claiming about 56 hp (42 kW) at 11,000 rpm. [citation needed] Racing fuel ratios typically 1:30. Standard exhausts are difficult to improve on in terms of power and torque, but they are very large and ...
It appeared in production on the 1974 Yamaha YZ-250, a model which is still in production, making it Yamaha's longest continuous model and name. Yamaha continued racing throughout the 1960s and 1970s with increasing success in several formats. The decade of the 1970s was capped by the XT500 winning the first Paris-Dakar Rally in 1979. [13]
A tsunami warning was issued Thursday morning following a 7.0 magnitude earthquake that struck in Humboldt County, 7 miles west-southwest of Ferndale, Calif., the National Weather Service said in ...
John Kocinski (born March 20, 1968, in Little Rock, Arkansas) is a retired American Grand Prix motorcycle road racer whose successes include winning the 1990 250cc World Championship and the 1997 Superbike World Championship title.
He accepted the offer. While he raced and led the early part of the 1997 Supercross season on a YZ250, Henry complications from a hand injury forced him to withdraw during the middle of the series. He came back riding the four-stroke full-time, and posted top-5 finishes at the first few Nationals, which was unprecedented for a four-stroke machine.