Editing Yamaha XS1

{{DISPLAYTITLE:{{PAGENAME}}: review, history, specs}}
{{Motorcycle
|name             = '''Yamaha XS-1'''
|photo            = 1970 Yamaha XS-1.jpg
|aka              = 
|manufacturer     = [[Yamaha]]
|parent_company   =
|production       = 1970
|model_year       =
|predecessor      =
|successor        = [[Yamaha XS650]]
|class            = [[Standard]]
|engine           = Air Cooled, Four Stroke, Parallel Twin Cylinder, SOHC, 2 Valves Per Cylinder
|bore_stroke      = 73.7mm x 73.7mm
|compression      = 8.4:1
|top_speed        =115 mph
|power            = 52.97 HP (39.5 KW) @ 7200RPM
|torque           = 39.83 ft/lbs (54.0 Nm) @ 6800RPM
|ignition         =
|spark_plug       =
|battery          =
|transmission     = Gear box: 5 Speed <br>
Final Drive: Chain <br>

|frame            =
|suspension       =Front: Telescopic Forks <br>
Rear: Dual Shock Absorbers
|brakes           =Front: Drum <br>Rear: Drum
|front_tire       = {{tire|3.50-19}} 
|rear_tire   	  = {{tire|4.00-18}} 
|rake_trail       =
|wheelbase        =
|length           =
|width            =
|height           =
|seat_height      =
|dry_weight       =
|wet_weight       =
|fuel_capacity    =
|oil_capacity     =
|recommended_oil=Yamalube 10w-40
|fuel_consumption =
|turning_radius   =
|related          =
|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.  

==Engine==
A 73.7mm [[bore]] x 73.7mm [[stroke]] result in a [[displacement]] of just 343.0 cubic centimeters.  

==Drive==
The bike has a 5 Speed transmission.  

==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.  

==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==
[[File:yamaha-xs-1-1970-1980-0.jpg|600px|1970 - 1980 Yamaha XS-1]]

The Yamaha XS 650 was produced from 1970 to 1980 and in the US the last model appeared in 1984. The first model was named XS-1, followed by XS-1B in 1971, XS-1 in 1972.




{{Yamaha}}

[[Category:Yamaha motorcycles]]
[[Category:Yamaha XS series]]
[[Category:Yamaha motorcycles]]
[[Category:1970s motorcycles]]