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Yamaha engineer Yoshiharu Nakayama first came up with the idea of creating the first competitive four-stroke race motocross bike. [6] The Yamaha YZ400F was developed to fit into this category. It solved the power dilemma by borrowing superbike technology and giving the YZ a five-valve head, liquid cooling and a 12.5-1 compression ratio.
Doug Henry (Yamaha)*YZ400F Ricky Carmichael (Kawasaki) Dee Wood 1999 Greg Albertyn (Suzuki) ... 1979-2006 Kenworthy's Motocross Park Troy: Ohio: 1987-2002, 2004
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 RD400 is a 399 cc (24.3 cu in) two-stroke air cooled six-speed motorcycle produced by Yamaha from 1976 until 1979. It evolved directly from the Yamaha RD350 . The 350 evolved into the RD400C in 1976, the "D", "E" in '77, '78 respectively and the final model, the white 1979 RD400F.
Yamaha 7 Yamaha Factory Racing 2011: Josh Hayes (2) Yamaha 3 ... 1979, 1980 Eddie Lawson: 2 1981, 1982 Wayne Rainey: 2 1983, 1987 Bubba Shobert: 1 1988 Jamie James: 1
The 1979 FIM Motocross World Championship was the 23rd F.I.M. Motocross Racing World Championship ... Yamaha 6 23 Pete Mathia Cotton - Rotax 6 24 Arne Lindfors Yamaha ...
Yamaha Motor Co., Ltd. (ヤマハ発動 ... The decade of the 1970s was capped by the XT500 winning the first Paris-Dakar Rally in 1979. [13] ... the YZ400F, won the ...
Henry would race the production version of the prototype four-stroke, the YZ400F, for 1998. This machine started the four-stroke revolution in motocross. He battled through a strong but unspectacular supercross season where he finished 7th overall. The outdoor season would be Henry's chance to show the bike's true capabilities.