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| [[Image:1959 Yamaha YDS-1.jpg|200px|thumb|right|1959 Yamaha YDS-1]] | | [[Image:1959 Yamaha YDS-1.jpg|200px|thumb|right|1959 Yamaha YDS-1]] |
| The '''Yamaha YDS-1''' was a 250cc, [[2-stroke]], twin cylinder, twin carb, streetbike produced by [[Yamaha]] starting in 1959 that had a reputation for blowing away 650cc vertical twins during this time. | | The '''Yamaha YDS-1''' was a 250cc, [[2-stroke]], twin cylinder, twin carb, streetbike produced by [[Yamaha]] starting in 1959 that had a reputation for blowing away 650cc vertical twins during this time. |
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| [[Image:YDS-1.jpg|thumb|350px|YDS-1]]
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| Further developing on the sporty performance of the YD-1, this new model mounted a 20hp engine on a steel-pipe cradle frame to achieve unprecedented running performance. Features like the first domestic-made 5-speed transmission and combination type instrument panel with engine tachometer caught the imagination of sports riders, who quickly nicknamed it “Japan’s first sports model.”
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| ==YDS1-R== | | ==YDS1-R== |
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| [[Category:1950s motorcycles]] | | [[Category:1950s motorcycles]] |
| [[Category:Yamaha motorcycles]] | | [[Category:Yamaha motorcycles]] |
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| {{Motorcycle
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| |name = Yamaha YDS-1
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| |photo=1959 Yamaha YDS-1.jpg
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| |aka =
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| |manufacturer = Yamaha
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| |parent_company =
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| |production = 1959
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| |model_year =
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| |predecessor =
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| |successor =
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| |class = Naked
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| |engine = Twin cylinder, two stroke, OHV, air-cooled
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| |bore_stroke = 53.3mm x 53.3mm
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| |compression =
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| |top_speed =
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| |power = 17.97 HP (13.4 KW) @ 7500RPM
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| |torque = 3.69 ft/lbs (5.0 Nm) @ 6000RPM
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| |ignition =
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| |spark_plug =
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| |battery =
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| |transmission = Gear box: 4-Speed <br>
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| Final Drive: Chain <br>
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| Clutch: Wet, multiplate <br>
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| |frame =
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| |suspension =Front: Telescopic forks <br>
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| Rear: Swing arm
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| |brakes =Front: Drum <br>Rear: Drum
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| |front_tire = {{tire|3.00-18}}
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| |rear_tire = {{tire|3.00-18}}
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| |rake_trail =
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| |wheelbase =
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| |length =
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| |width =
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| |height =
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| |seat_height =
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| |dry_weight =
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| |wet_weight = 138.0 kg
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| |fuel_capacity =
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| |oil_capacity =
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| |recommended_oil=Yamalube 10w-40
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| |fuel_consumption =
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| |turning_radius =
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| |related =
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| |competition =
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| }}
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| The '''[[Yamaha]] YDS-1''' was a Twin cylinder, two stroke, OHV, air-cooled Naked [[motorcycle]] produced by [[Yamaha]] in 1959. Max [[torque]] was 3.69 ft/lbs (5.0 Nm) @ 6000 RPM. Claimed [[horsepower]] was 17.97 HP (13.4 KW) @ 7500 RPM.
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| ==Engine==
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| A 53.3mm [[bore]] x 53.3mm [[stroke]] result in a [[displacement]] of just 249.0 cubic centimeters.
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| ==Drive==
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| The bike has a 4-Speed transmission. Power was moderated via the Wet, multiplate.
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| ==Chassis==
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| It came with a 3.00-18 front [[tire]] and a 3.00-18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Swing arm.
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| ==1959 - 1962 Yamaha YDS-1==
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| [[File:yamaha-yds-1-2-1959-1962-0.jpg|600px|1959 - 1962 Yamaha YDS-1]]
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| Further developing on the sporty performance of the YD-1, this new model mounted a 20 hp (15 Kw) engine on a steel-pipe cradle frame to achieve unprecedented running performance. Features like the first domestic-made 5-speed transmission and combination type instrument panel with engine tachometer caught the imagination of sports riders, who quickly nicknamed it Japan’s first sports model.
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| [[Category:Naked motorcycles]]
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| [[Category:Yamaha motorcycles]]
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| [[Category:1950s motorcycles]]
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