1987 Honda BROS PRODUCT ONE 650cc (RC31) & Honda BROS PRODUCT TWO 400cc (NC25)
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| Honda BROS photo. |
Two models of Honda Bros, a unique road sports bike that allows you to enjoy the unique ride of a narrow-angle V-twin engine
Honda Motor Co., Ltd. has created a new type of unique road sports bike that allows you to enjoy the unique riding feel of a narrow-angle V-twin engine and excellent maneuverability from city driving to suburban and highway touring Honda Bros Product 1 (One) (647cm3) and Product 2 (Two) (398cm3) The two models were released on January 9 and January 15, 1988 respectively.
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| 1990 Honda BROS Product 1 picture. semi-up handlebar. |
This Broth has a newly designed cylinder layout with a narrow angle (52 degrees) in order to enjoy the feeling of heartbeat in the low and medium speed range, while at the same time achieving light and extended output characteristics in the high speed range. adopted a water-cooled V-twin engine. The latest technology such as aluminum twin-tube frame and cantilevered swing arm (Pro Arm) is introduced to the frame and suspension. In addition, the innovative style that harmonizes simple, smooth curved surfaces and powerful straight lines, combined with the high-quality materials and finishes of each part, creates a unique road sports model that differs from conventional sports bikes. It is designed to meet a wider range of user needs.
| broth | ||
| Product 1(647cm3 ) | Product 2(398cm3 ) | |
| Release date | January 9, 1988 | January 15, 1988 |
| Sales plan (domestic/annual) | 3,000 units | 7,000 units |
| *National standard cash price (excluding some remote islands.) |
589,000 yen *Hokkaido and Okinawa are 10,000 yen higher /td> |
559,000 yen *9,000 yen higher in Hokkaido and Okinawa |
Honda BROS Features
- Engine: A newly designed water-cooled, 4-cycle, SOHC valve, 52-degree V-twin cylinder, with detailed specifications such as the intake/exhaust system and valve opening/closing timing in order to achieve a pleasant driving feeling. Pursuit. In addition, two stainless steel exhaust pipes are placed on the right side, and together with the short-type muffler with a new feel, the V-twin engine’s individuality and strength are emphasized.
- Body: Newly designed aluminum twin-tube frame with extra-thick (41mm diameter) front forks and cantilevered rear swingarm. In addition, the combination of newly designed aluminum cast wheels (17 inches for both front and rear) with wide tires (110/80 for front, 150/70 for rear) makes it possible to fully enjoy driving.
The front brake employs a large diameter (320mm) floating disc plate with an odd-shaped opposed 4-pot caliper. It improves the brake feeling.
The separate duralumin handlebars, together with the aluminum steps and bracket mounting positions, ensure a comfortable riding position.
In addition, consideration has been given to usability by adopting retractable luggage hooks and an adjustable front brake lever.
1987 Honda BROS Main Specifications
| BROS(PRODUCT ONE) | BROS(PRODUCT TWO) | ||
| Model | RC31 | NC25 | |
| Total length (m) | 2.060 | 2.060 | |
| Width (m) | 0.695 | 0.695 | |
| Total height (m) | 1.050 | 1.050 | |
| Wheel Distance (m) | 1.430 | 1.425 | |
| Minimum ground clearance (m) | 0.155 | 0.155 | |
| Seat height (m) | 0.770 | 0.770 | |
| Vehicle weight (kg) | 181 | 180 | |
| Dry weight (kg) | 165 | 164 | |
| Capacity (persons) | 2 | 2 | |
| Fuel efficiency (km/L) 60km/h level running test value |
36.0 | 40.0 | |
| Minimum turning radius (m) | 2.8 | 2.8 | |
| Engine type | RC31E (water-cooled, 4-stroke, V-twin) |
NC25E /> (Water-cooled, 4-stroke, V-twin) |
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| Total Displacement (cm3 ) | 647 | 398 | |
| Inner Diameter x Stroke (mm) | 79.0×66.0 | 64.0×62.0 | |
| Compression Ratio | 9.4 | 10.0 | |
| Max output (PS/rpm) | 55.0/7,500 | 37.0/8,500 | |
| Max torque (kg-m/rpm) | 5.7/6,500 | 3.5/6,500 | |
| Carburetor type | VDG3 | VDF1 | |
| Starting method | Self-operated | Self-operated | |
| Ignition method | Full transistor | Full transistor | |
| Lubrication method | Pumping splash combination method | Pumping splash combination method | |
| Lubricant capacity (L) | 2.8 | 2.8 | |
| Fuel tank capacity (L) | 12 | 12 | |
| Clutch type | Wet multi-plate coil spring | Wet multi-plate coil spring | |
| Transmission type | Constant mesh 5-speed return | Constant mesh 5-speed return | |
| Transmission ratio | 1st | 2.571 | 3.000 |
| 2 speed | 1.882 | 2.055 | |
| 3 speed | 1.500 | 1.590 | |
| 4 speed | 1.240 | 1.318 | |
| 5 speed | 1.074 | 1.130 | |
| Reduction ratio (primary/secondary) | 1.763/2.687 | 2.058/2.750 | |
| Caster (degrees) | 27°00′ | 27°00′ | |
| Trail (mm) | 111 | 111 | |
| Tire size | Front | 110/80-17 57H | 110/80-17 57H |
| Rear | 150/70-17 69H | 150/70-17 69H | |
| Brake type | Front | Hydraulic disc | Hydraulic disc |
| Rear | |||
| Suspension method | Front | Telescopic | Telescopic |
| Rear | Swing Arm (Pro Arm) | Swing Arm (Pro Arm) | |
| Frame format | Diamond | Diamond | |