Honda C90 K3: history, specs, pictures
| Honda C90 K3 | |
| Manufacturer | |
|---|---|
| Production | 1978 |
| Engine | single cylinder, four-stroke |
| Bore / Stroke | 50.0mm x 45.6mm |
| Top Speed | 50 mph (80 km/h) |
| Horsepower | 7.38 HP (5.5 KW) @ 9500RPM |
| Torque | 0.52 ft/lbs (0.7 Nm) @ 6000RPM |
| Fuel System | carburetor. keihin seiki |
| Ignition | contact breaker points |
| 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) |
| Length | 72.05 inches (1830 mm) |
| Width | 25.2 inches (640 mm) |
| Height | 39.17 inches (995 mm) |
| Seat Height | 31.1 inches (790 mm) |
| Weight | 187.39 pounds (85.0 Kg) (dry), 91.6 kg (wet) |
| Recommended Oil | Honda GN4 10W-40 |
| 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 |
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.
Engine[edit | edit source]
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[edit | edit source]
The bike has a 3-speed transmission. Power was moderated via the multi plate wet automatic.
Chassis[edit | edit source]
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.