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{{DISPLAYTITLE:{{PAGENAME}}: review, history, specs}} | {{DISPLAYTITLE:{{PAGENAME}}: review, history, specs}} | ||
{{Motorcycle | {{Motorcycle | ||
|name = '''Yamaha XS-1''' | |name = '''Yamaha XS-1''' | ||
| | |photo = 1970 Yamaha XS-1.jpg | ||
|aka = | |aka = | ||
|manufacturer = [[Yamaha]] | |manufacturer = [[Yamaha]] | ||
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|model_year = | |model_year = | ||
|predecessor = | |predecessor = | ||
|successor = | |successor = [[Yamaha XS650]] | ||
|class = [[ | |class = [[Standard]] | ||
|engine = Air Cooled, Four Stroke, Parallel Twin Cylinder, SOHC, 2 Valves Per Cylinder | |engine = Air Cooled, Four Stroke, Parallel Twin Cylinder, SOHC, 2 Valves Per Cylinder | ||
|bore_stroke = 73.7mm x 73.7mm | |bore_stroke = 73.7mm x 73.7mm | ||
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|competition = | |competition = | ||
}} | }} | ||
[[Image:1970 Yamaha XS-1 green white.jpg|200px|thumb|left|1970 Yamaha XS-1 green white]] | |||
The 1970 '''XS-1''' was the first [[Yamaha]] [[4-stroke]] model featuring a 650cc vertical, twin cylinder [[engine]]. It became extremely popular due to its reliability and high level of rider enjoyment. | |||
This took them firmly into Triumph and Honda territory with a 653cc vertical twin, overhead- | |||
camshaft model using knowledge they had gained from [[Hosk]], a firm that came to them with | |||
[[Showa]]. Whereas the latter had introduced them to two-stroke engines with disc valves, the Hosk line included a 500cc ohc twin which was capable of 110mph and well able to run with some of the best from Britain . | |||
The XS1 was not as quick as the Hosk and lacked its character but was a more civilized | |||
machine. It led on to the [[Yamaha XS2|XS2]] of 1972, when it was joined by two short-lived models. The first of these was the [[Yamaha TX750|TX750]], a vertical twin which introduced balance shafts within the crankcase to reduce vibration. The system was known as 'Omni-Phase Balancer' and worked well, but the machine proved unreliable and was quickly dropped. The second model, which never reached production, had a 662cc rotary Yanmar twin engine and was only seen at Tokyo shows. In 1973 the [[Yamaha TX500|TX500]] appeared with twin overhead camshafts and two years later evolved into the [[Yamaha XS500|XS500]] which sold to the end of the decade, but never in large numbers. | |||
The '''[[Yamaha]] XS-1''' was a Air Cooled, Four Stroke, Parallel Twin Cylinder, SOHC, 2 Valves Per Cylinder Naked [[motorcycle]] produced by [[Yamaha]] in 1970. Max [[torque]] was 39.83 ft/lbs (54.0 Nm) @ 6800 RPM. Claimed [[horsepower]] was 52.97 HP (39.5 KW) @ 7200 RPM. | The '''[[Yamaha]] XS-1''' was a Air Cooled, Four Stroke, Parallel Twin Cylinder, SOHC, 2 Valves Per Cylinder Naked [[motorcycle]] produced by [[Yamaha]] in 1970. Max [[torque]] was 39.83 ft/lbs (54.0 Nm) @ 6800 RPM. Claimed [[horsepower]] was 52.97 HP (39.5 KW) @ 7200 RPM. | ||
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==Chassis== | ==Chassis== | ||
It came with a 3.50-19 front [[tire]] and a 4.00-18 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 Dual Shock Absorbers. | It came with a 3.50-19 front [[tire]] and a 4.00-18 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 Dual Shock Absorbers. | ||
==1971== | |||
<gallery mode='packed-hover'> | |||
File:1971-yamaha-xs1-b-0.jpg|1971 YAMAHA XS1-B | |||
File:1971-yamaha-xs1-b-1.jpg|1971 YAMAHA XS1-B | |||
File:1971-yamaha-xs1-b-2.jpg|1971 YAMAHA XS1-B | |||
File:1971-yamaha-xs1-b-3.jpg|1971 YAMAHA XS1-B | |||
File:1971-yamaha-xs1-b-4.jpg|1971 YAMAHA XS1-B | |||
File:1971-yamaha-xs1-b-5.jpg|1971 YAMAHA XS1-B | |||
</gallery> | |||
==1970 - 1980 Yamaha XS-1== | ==1970 - 1980 Yamaha XS-1== | ||
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[[Category: | |||
{{Yamaha}} | |||
[[Category:Yamaha motorcycles]] | |||
[[Category:Yamaha XS series]] | |||
[[Category:Yamaha motorcycles]] | [[Category:Yamaha motorcycles]] | ||
[[Category:1970s motorcycles]] | [[Category:1970s motorcycles]] | ||