The Bimota YB9, also called the YB9 Bellaria 600, is a 598 cc Yamaha-engined sport bike that Bimota built from 1990 to 1998.
Bimota YB9 at a glance
| Manufacturer | Bimota, Rimini, Italy |
|---|---|
| Production | 1990–1998 |
| Engine | 598 cc inline-four, four-stroke, Yamaha FZR600 derived |
| Carburettors | 4 × Mikuni, 38 mm |
| Frame | Aluminium, same construction as the YB8 |
| Fork | 40 mm inverted Marzocchi |
| Shock | Marzocchi |
| Brakes | Brembo, 300 mm front and 230 mm rear discs |
| Wheels | Oscam aluminium, three-spoke |
This article is based on the Italian Wikipedia article on the Bimota YB9.
History of the Bimota YB9
The YB9 was presented in 1989 and produced from 1990 to 1998. Its 598 cc inline four came from the Yamaha FZR600 through a supply agreement and was fed by four 38 mm Mikuni carburettors. As on other Bimotas of the period, the engine was a stressed member of the aluminium frame, whose construction was identical to that of the YB8.
The cycle parts included a 40 mm inverted Marzocchi fork, a Marzocchi rear shock, Brembo brakes with two 300 mm front discs and a 230 mm rear disc, and three-spoke Oscam aluminium wheels.
YB9 SR and YB9 SRI
The YB9 SR was introduced in 1994 as an evolution of the Bellaria. Power rose to 100 hp at 11,500 rpm thanks to four 26 mm Keihin carburettors. The frame stayed the same, but the fork and shock were replaced by Paioli units, the front discs grew to 320 mm and the black aluminium wheels came from Marchesini; dry weight fell to 175 kg.
In 1995 came the YB9 SRI, which replaced the carburettors with electronic fuel injection and added a carbon-fibre airbox, a position light and a new nose fairing with a better aerodynamic coefficient. Its aluminium wheels, now silver, were made by Antera.
Design and features
- Engine: a 598 cc Yamaha FZR600-derived four with four Mikuni carburettors.
- Frame: an aluminium frame built like the YB8’s.
- Suspension: Marzocchi fork and shock on the standard model, Paioli on the SR.
- Wheels: Oscam on the standard model, Marchesini on the SR and Antera on the SRI.
Bimota YB9 versions
- YB9 Bellaria: the original 598 cc model, produced from 1990 to 1998.
- YB9 SR: the 1994 evolution with 100 hp, Paioli suspension and 320 mm front discs.
- YB9 SRI: the 1995 version with electronic fuel injection and a carbon-fibre airbox.
See also: the Bimota YB6, the Bimota YB8, the Bimota SB6 and the Bimota collection.
Bimota YB9 questions and answers
What is the Bimota YB9?
A 598 cc Yamaha-engined sport bike built by Bimota from 1990 to 1998, also called the YB9 Bellaria 600.
What engine did the YB9 use?
An inline four derived from the Yamaha FZR600, with four 38 mm Mikuni carburettors.
What was the YB9 SR?
A 1994 evolution with 100 hp at 11,500 rpm, Paioli suspension and 320 mm front brake discs.
What was the YB9 SRI?
The 1995 version with electronic fuel injection, a carbon-fibre airbox and a revised fairing.
How much did the YB9 SR weigh?
Its dry weight was 175 kg.
Video: Bimota YB9
Video by STAR BIKERS la moto per tutti on YouTube.
Sources
- Bimota YB9, Italian Wikipedia: history, engine, chassis, SR and SRI versions
