The Bimota YB4 IE SP motorcycle was produced in a limited run of 15 units in 1988. It features a four stroke, transverse four cylinder engine with DOHC and 5 valves per cylinder. The bike has a capacity of 749 cc and a compression ratio of 11.2:1. It also has a Weber Marelli electronic fuel injection system and CDI ignition. The motorcycle has a maximum power output of 89 kW (121 hp) at 10500 rpm and a maximum torque of 88.3 Nm (65.1 ft-lbs) at 8500 rpm. The bike has a six-speed transmission and a chain final drive.
The frame of the YB4 IE SP is made of two diagonal beams in section bar made of aluminum with internal ribbing. It has a swing arm made of aluminum and the cylinders are supported by plates bolted to the beams. The front suspension features 42mm gas telescopic forks with external adjustment for anti-dive, while the rear suspension has a gas single shock with external adjustment. The front and rear brakes consist of two 320mm discs and a single 230mm disc, respectively. The front and rear tires are 3.50-17 and 5.50-17, respectively.
The dry weight of the motorcycle is 180 kg (396.8 lbs) and it has a fuel capacity of 20 liters (5.3 US gallons). The average consumption is 6.5 l/100km (36.2 mpg). In terms of braking, the bike can come to a stop from 60-0 in 13.2 meters (43.3 feet) and from 100-0 in 36.0 meters (118.1 feet). In a standing quarter mile, the bike recorded a time of 10.8 seconds at a speed of 201.8 km/h (125.4 mph). The bike was reviewed by several motorcycle publications including Motosprint, Motorrad, and Moto.Revue, and was compared to the YB4 vs RC30 and YB4 vs FZR750R motorcycles.
Technical specifications:
Make Model: Bimota YB4 EI SP
| Year | 1988 |
|---|---|
| Production | 15 units |
| Engine | Four stroke, transverse four cylinder, DOHC, 5 valves per cylinder. |
| Capacity | 749 cc / 45.7 cub. in. |
| Bore x Stroke | 68 x 51.6 mm |
| Compression Ratio | 11.2:1 |
| Cooling System | Liquid cooled |
| Induction | Weber Marelli electronic fuel injection |
| Ignition | CDI |
| Starting | Electric |
| Max Power | 89 KW / 121 hp @ 10500rpm |
| Max Power Rear Tyre | 72.7 kW / 97.5 hp @ 10400 rpm |
| Max Torque | 88.3 Nm / 9.0kgf-m / 65.1 [email protected] 8500rpm |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Frame | Two diagonal beams in section bar made of aluminium with internal ribbing. The cylinders are supported by plates bolted to the beams and the swing arm is made of aluminium |
| Front Suspension | 42mm Gas telescopic forks, external adjustment for anti-dive |
| Rear Suspension | Gas single shock, external adjustment |
| Front Brakes | 2x 320mm discs |
| Rear Brakes | Single 230mm disc |
| Front Tyre | 3.50-17 |
| Rear Tyre | 5.50-17 |
| Dry Weight | 180 kg / 396.8 lbs. |
| Fuel Capacity | 20 Litres / 5.3 US gal |
| Consumption average | 6.5 l/100km / 36.2 mpg |
| Braking 60 – 0 / 100 – 0 | 13.2 m / 36.0 m 43.3 ft / 118.1 ft. |
| Standing 1/4 Mile | 10.8 sec / 201.8 km/h / 125.4 mph |
| Road Test | Motosprint Group Test Moto.Journal Moto.Revue In.Moto YB4 vs RC30 BIKE Motorrad Motorrad YB4 vs FZR750R |
