1998年3月1日 · Yamaha’s YZ400F has to be considered a resounding success. The company gambled on an unproven concept, rushed the result into production, and in the process opened a new chapter in motocross...

2005年11月1日 · Yamaha built the YZ 400 engine based on computer modeling studies. It shares little, if anything, with its ancestors. Power is generated in the ceramic composite plated cylinder via 5 valves: three...

In 1998, the YZ400F changed everything. It was originally seen as a replacement for the YZ490 in the Yamaha line, but AMA rules of the day allowed 560cc four-strokes to compete against 250cc two-strokes.

2012年4月1日 · Whether the motor sang along at 10,000 rpms and chugged by at 4,000, the YZ400F seemed to go wherever you wanted to point it. In slicker, wet conditions the 400F seemed to have a mind of it's own and searched for it's own way.

This 1979 Yamaha YZ400F was acquired by the seller in 2023 following reported refurbishment work under previous ownership that involved powder-coating the frame in black, overhauling the 396cc two-stroke single, re-jetting the Mikuni carburetor, re-upholstering the seat, and replacing the drive chain, grips, fork seals, tires, bearings, fenders ...

De Winner: Yamaha YZ400F. Even though the YZF outweighed the two-strokes by 14 to 17 pounds, it felt lighter on the track, Surprisingly, the heaviest bike in this comparison is the most fun on a motocross track, and it is, by far, the fastest through turns.

With its development of the YZM400F factory machine and YZ400F production motocrosser, Yamaha overturned the long-held belief of the industry (and the sport of Supercross) about 4-stroke motocrosser capability and competitiveness.

2011年7月20日 · This is my look back at the history of Yamaha's Open class four-strokes from 1998 through 2022.

1997年9月1日 · Yamaha’s got one and it’s as serious as a 90-foot triple-jump. It’s the YZ400F,4 available in dealerships this December. A full-blown 400cc four-stroke racebike may be shocking news, especially...

2012年8月9日 · Quality vintage, motocross, dual sport and modern used dirt bike parts. Your dirt bike engine and part information source. Specs for 1998 Yamaha YZ400F.