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This model used the world’s first oil injection lubrication system (the Yamaha Autolube system) in a 2-stroke engine that traditionally employed blended-oil lubrication.
One of the design elements was the side cover holding the oil tank.
The rear suspension was equipped with a 3-step adjustable shock absorber.
The Yamaha Autolube system employed a plunger pump as a method for allowing minute amounts of oil to spread over the lubricated surfaces of each engine part. The structure utilized a distributor that reliably discharged oil at each stroke.
In order to inject an amount of oil corresponding to the engine load, a mechanism was incorporated for varying the plunger stroke in conjunction with the throttle angle. |
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| Storage location | : | YAMAHA COMMUNICATION PLAZA (2500, Shingai, Iwata-shi, Shizuoka-ken 438-8501) | |
| Year manufactured | : | 1964 | |
| Manufacturer | : | Yamaha Motor Co., Ltd. | |
| Classification | : | Mass-production vehicle | |
| Current status | : | On public display: static | |
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| Vehicle name / Manufacture |
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| Vehicle name | : | Yamaha Sports YDS-3 |  |
| Model | : | Yamaha Y23(YDS-3) | |
| Company name | : | Yamaha Motor Co., Ltd. | |
| Vehicle type/usage | : | On-road sports bike | |
| Location of actual vehicle/replica | : | Communication Plaza | |
| Year manufactured | : | 1964 | |
| Designed by | : | Yamaha Motor Co., Ltd. |
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| Model / Weight |
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| Style | : | Sports | |
| Passenger capacity | : | 2 | |
| Weight | : | 163 kg | |
| Front axle weight | : | 73 kg | |
| Rear axle weight | : | 90 kg | |
| Points of interest, topicality | : | Vehicle with 2-stroke separate lubrication pump |
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| Body / Size |
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| Overall length | : | 1975 mm | |
| Overall width | : | 780 mm | |
| Overall height | : | 1050 mm | |
| Headlamp type | : | 6 V, 35 W | |
| Tire size (front) | : | 3.00-18-2PR | |
| Tire size (rear) | : | 3.00-18-4PR |
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| Body / Axle / Driving / Others |
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| Frame | : | Double cradle | |
| Suspension type (front) | : | Telescopic fork | |
| Suspension type (rear) | : | Swing arm | |
| Wheelbase | : | 1295 mm | |
| Brakes (front) | : | Wire internal expanding brake | |
| Brakes (rear) | : | Wire internal expanding brake | |
| Damper (front) | : | Coil spring, oil damper | |
| Damper (rear) | : | Coil spring, oil damper |
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| Engine/ Size / Power |
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| Type | : | Air-cooled 2-stroke gasoline | |
| Cylinder arrangement | : | Inline 2-cylinder | |
| Carburetor | : | VM245CX2 | |
| Bore x stroke | : | 56×50 | |
| Displacement | : | 246 cc | |
| Ignition system | : | Battery ignition | |
| Max. power/r.p.m. | : | 23 ps/7500 rpm | |
| Lubrication method | : | Separate lubrication | |
| Start method | : | Kick | |
| Fuel tank capacity | : | 14 L |
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| Drive-train |
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| Transmission | : | Constant-mesh type 5 forward speeds | |
| Clutch type | : | Wet multiple disc type |
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| Performance |
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| Fuel economy rating | : | 40 km/L (at 40 km/h) |
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