Designer	Frederico Martini	Premiere	Cologne 1988
Production period	1988 – 1989	Production number	321
Power	48 KW (65 PS)	Displacement	399 cc
Topspeed	220 km/h	Weight	wet 183 kg dry 162 kg
Listenpreis	2.120.000 Yen (1988)	Colours	161 red / white /gold 124 white / red / green 15 red / white / blue
Technical basis	Yamaha FZ 400

In Japan, motorcycles up to 400 cc are highly sought after, as they come with lower taxes and insurance costs, and the license is significantly easier to obtain compared to larger-displacement motorcycles. For larger bikes, riders must not only pass a demanding practical exam but also demonstrate that they can lift the motorcycle on their own if it falls over.

Japan is also one of Bimota’s most important markets. About three-quarters of the DB1, produced since 1985, were delivered to Japan, and in 1986, the DB1 400 J became the first model specifically developed for the Japanese market. It was therefore only logical to offer a 400 cc version of the successful YB4 and YB6 for the Japanese market.

The engine of the YB7 is the four-cylinder, four-valve DOHC unit from the Yamaha FZ 400, a model sold exclusively in Japan. In addition to a frame with thinner walls, the braking system was adapted to the lower power output, featuring 280 mm front discs. The rear tire was reduced from 180 mm to 160 mm. Trail, steering head angle, and wheelbase were slightly smaller than those of its larger siblings, making the motorcycle extremely agile – especially due to its lower weight, primarily achieved through the smaller engine.

The YB7 was available in three color schemes: the classic red/white with gold stripes from the YB4, the same design in dark blue, which aligned with Yamaha’s colors, and a red/white version with a green stripe, which later reappeared on the YB8.