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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 DT is a series of motorcycles and mopeds produced by the Yamaha Motor Corporation. Models in the DT series feature an engine displacement of 50 to 400 cc (3.1 to 24.4 cu in). The first DT model, the DT-1, was released in 1968 and quickly sold through its initial 12,000 production run.
Michael R. Bell (August 8, 1957 – January 25, 2021) was an American professional motocross and mountain bike racer. [1] He competed in the AMA Motocross Championships from 1976 to 1983. [ 2 ] Bell was a member of the Yamaha factory racing team for his entire motocross career, winning the AMA Supercross Championship in 1980. [ 2 ]
These bikes are less expensive, and require less time to complete. [30] Pit bikes are powered by 4-stroke, horizontal, single-cylinder engines ranging anywhere in displacement from 49 cc to 195 cc. A typical pit bike is usually a small dirt bike, but it has become common to be able to buy pit bikes with street-style wheels and tires.
For 1997, Yamaha approached Henry with the idea of riding their prototype YZM400 four-stroke in competition. He accepted the offer. 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.
The series is the major outdoor motocross series in the United States and is sanctioned by AMA Pro Racing and managed by MX Sports Pro Racing. With respect to the MXGP holding the discipline's worldwide title, and the advent of the FIM Supercross World Championship resulting in the AMA Supercross Championship losing its world title status, the ...
The AMA - fearing a Hannah sweep of every championship - started holding 125cc and 250cc events on the same day causing Yamaha to defer Hannah to the 125cc class when the two conflicted. [18] The move by the AMA combined with the enormity of competing in so many races contributed to Hannah being a non-factor in the 250cc series, finishing ...
MX racing bikes have often been used as platforms for building enduro bikes. [1] This was partially driven by the conversion of MX from 2-stroke to 4-stroke engine designs to comply with regulatory trends, as well as the development of hybrid competition races such as Enduro-X. [1] Compared to MX bikes, enduro and dual-sport bikes traditionally had a much higher proportion of 4-stroke motors.
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