Honda C90 K3: history, specs, pictures
The Honda C90 K3 was a single cylinder, four-stroke standard produced by Honda in 1978. It could reach a top speed of 50 mph (80 km/h). Max torque was 0.52 ft/lbs (0.7 Nm) @ 6000 RPM. Claimed horsepower was 7.38 HP (5.5 KW) @ 9500 RPM.
| Manufacturer | Honda |
|---|---|
| Production | 1978 |
| Engine | single cylinder, four-stroke |
| Bore / Stroke | 50.0mm x 45.6mm |
| Top speed | 50 mph (80 km/h) |
| Horse Power | 7.38 HP (5.5 KW) @ 9500RPM |
| Torque | 0.52 ft/lbs (0.7 Nm) @ 6000RPM |
| Fuel system | carburetor. keihin seiki |
| Ignition type | contact breaker points |
| Battery | 8.2:1 |
| Transmission | Gear box: 3-speed Final Drive: chain |
| Suspension | Front: hydraulically dampened leading link forks Rear: hydraulically dampened with compression spring |
| Brakes | Front: expanding brake (drum brake). twin expanding shoe Rear: expanding brake (drum brake). twin expanding shoe |
| Wheelbase | 46.85 inches (1190 mm) |
| Dimensions | L 72.05 inches (1830 mm) W 25.2 inches (640 mm) H 39.17 inches (995 mm) |
| Seat height | 31.1 inches (790 mm) |
| Weight | 187.39 pounds (85.0 Kg) (dry), 91.6 kg (wet) |
| Fuel capacity | 1.45 Gallon (5.50 Liters) |
| Fuel consumption | 2.50 liters/100 km (40.0 km/l or 94.09 mpg) |
| Manuals | Service Manual |
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Engine
The engine was a air cooled single cylinder, four-stroke. A 50.0mm bore x 45.6mm stroke result in a displacement of just 89.0 cubic centimeters. Fuel was supplied via a overhead cams (ohc).
Drive
The bike has a 3-speed transmission. Power was moderated via the multi plate wet automatic.
Chassis
Stopping was achieved via expanding brake (drum brake). twin expanding shoe in the front and a expanding brake (drum brake). twin expanding shoe in the rear. The front suspension was a hydraulically dampened leading link forks while the rear was equipped with a hydraulically dampened with compression spring. The C90 K3 was fitted with a 1.45 Gallon (5.50 Liters) fuel tank. The bike weighed just 187.39 pounds (85.0 Kg). The wheelbase was 46.85 inches (1190 mm) long.