Yamaha AS: history, specs, pictures
| Manufacturer | Yamaha |
|---|---|
| Also called | AS1, AS 3 |
| Production | 1968 - 1972 |
| Engine | twin, two-stroke |
| Bore / Stroke | 43.0mm x 43.0mm |
| Top speed | 79 mph (127 km/h) |
| Horse Power | 15.69 HP (11.7 KW) @ 9800RPM |
| Torque | 9.37 ft/lbs (12.7 Nm) @ 8000RPM |
| Fuel system | carburettor |
| Ignition type | points |
| Battery | 7.0:1 |
| Transmission | Gear box: 5-speed Final Drive: chain |
| Suspension | Front: telescopic Rear: swinging arm, coil spring oil damper |
| Brakes | Front: expanding brake Rear: expanding brake |
| Front Tire | 2.50-18 |
| Rear Tire | 2.75-18 |
| Wheelbase | 42.2 inches (1072 mm) |
| Dimensions | L 72.99 inches (1854 mm) W 26.42 inches (671 mm) H 39.8 inches (1011 mm) |
| Weight | 216.05 pounds (98.0 Kg) (dry), 105.0 kg (wet) |
| Fuel capacity | 2.38 Gallon (9.00 Liters) |
| Manuals | Service Manual |
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The Yamaha AS 3 was a twin, two-stroke standard produced by Yamaha between 1968 and 1972. It could reach a top speed of 79 mph (127 km/h). Max torque was 9.37 ft/lbs (12.7 Nm) @ 8000 RPM. Claimed horsepower was 15.69 HP (11.7 KW) @ 9800 RPM.
Engine
The engine was a air cooled twin, two-stroke. A 43.0mm bore x 43.0mm stroke result in a displacement of just 125.0 cubic centimeters. Fuel was supplied via a port control.
Drive
The bike has a 5-speed transmission.
Chassis
It came with a 2.50-18 front tire and a 2.75-18 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The front suspension was a telescopic while the rear was equipped with a swinging arm, coil spring oil damper. The AS 3 was fitted with a 2.38 Gallon (9.00 Liters) fuel tank. The bike weighed just 216.05 pounds (98.0 Kg). The wheelbase was 42.2 inches (1072 mm) long.