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{{Motorcycle
{{Infobox Motorcycle
|name            = Yamaha YSR50
|name            = Yamaha YSR50
|photo= 1987-Yamaha-YSR50-White-5492-0.jpg
|image            =  
|aka              =  
|aka              =  
|manufacturer    = Yamaha
|manufacturer    = [[Yamaha]]
|parent_company  =  
|parent_company  =  
|production      = 87-93
|production      = 87-93
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|successor        =  
|successor        =  
|class            =  
|class            =  
|engine          = 49.3cc [[2-stroke]], single cylinder, [[air-cooled]] with [[reed valve]]
|engine          = 50cc
|bore_stroke      = 40.0mm x 39.2mm
|bore_stroke      =  
|compression      = 7.4:1
|compression      =  
|top_speed        =38 mph
|top_speed        =  
|power            = 7 [[horsepower]] @ 8,800 [[RPM]]
|power            =  
|torque          = 0.59 kg-m @ 8,500 RPM
|torque          =  
|ignition        =  
|ignition        =  
|fuel_system      = Carburetor, Mikuni VM16SH
|spark_plug      = {{sparkplug|NGK B8HS}} '87-93
|spark_plug      = {{sparkplug|NGK B8HS}} '87-93
|battery          = {{battery|YUASA 6N4-2A-2}} '87-93
|battery          = {{battery|YUASA 6N4-2A-2}} '87-93
|transmission    = 5-speed constant mesh
|transmission    =  
|final_drive= {{chain|420x100}}
|front_sprocket= 12T
|rear_sprocket= 44T
|frame            =  
|frame            =  
|suspension      =  
|suspension      =  
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|rear_tire    = {{tire|4.00-12}} '87-93
|rear_tire    = {{tire|4.00-12}} '87-93
|rake_trail      =  
|rake_trail      =  
|wheelbase        = 1050mm
|wheelbase        =  
|length          = 1575mm
|length          =  
|width            = 635mm
|width            =  
|height          = 930mm
|height          =  
|seat_height      = 650mm
|seat_height      =  
|dry_weight      = 75kg
|dry_weight      =  
|wet_weight      =  
|wet_weight      =  
|fuel_capacity    =  
|fuel_capacity    =  
|oil_capacity    =  
|oil_capacity    =  
|recommended_oil= Yamalube 10w-40
|fuel_consumption =  
|fuel_consumption =  
|turning_radius  =  
|turning_radius  =  
|related          = [[Yamaha RX50]] (contained same engine), [[Yamaha YSR80]]
|related          = [[Yamaha RX50]] (contained same engine)
|competition      = [[Honda NSR50]], [[Aprilia RS50]]
|competition      =  
}}
}}


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This style of miniature [[motorcycle]] is known as a pocket bike.  Although small in size, these machines are capable of giving surprising performances in the hands of skilled operators.  Enthusiast groups organize races and endurance runs for pocket-bikes, of which the '''YSR''' [[Yamaha]] is the most popular.  It mainly competes with the likes of the [[Honda NSR50]].  The limited edition [[Yamaha RX50]] shared the same engine.
This style of miniature [[motorcycle]] is known as a pocket bike.  Although small in size, these machines are capable of giving surprising performances in the hands of skilled operators.  Enthusiast groups organize races and endurance runs for pocket-bikes, of which the '''YSR''' [[Yamaha]] is the most popular.  It mainly competes with the likes of the [[Honda NSR50]].  The limited edition [[Yamaha RX50]] shared the same engine.


==History==
'''Yamaha YSR 50''' and [[Yamaha YSR80|YSR 80]] sport models goes on sale in Japan in 1986, and had the look of a re-shaped, scaled-down [[Yamaha YZR500|YZR500]] factory racer that appealed to the spirit of race enthusiasts. The 2-stroke single-cylinder engine had a maximum output of 7 ps for the 50cc and 8.8 ps for the 80cc, a return type 5-speed transmission, front disc brake and other features to offer full-fledged sport riding potential. It became a standard in the mini-bike races popular at the time. 1992 was the last year of production, and the price was 189.000 yen for the 50cc and 211.000 yen for the 80cc.
{{clear}}
==1987==
==1987==
<gallery mode="packed-hover">
[[Image:1987-Yamaha-YSR50-White-5492-0.jpg|left|thumb|1987 Yamaha YSR50 in White]]
File:1987-Yamaha-YSR50-White-5492-0.jpg|left|thumb|1987 Yamaha YSR50 in White
[[Image:1987-Yamaha-YSR50-White-5492-1.jpg|left|thumb|1987 Yamaha YSR50 in White]]
File:1987-Yamaha-YSR50-White-5492-1.jpg|left|thumb|1987 Yamaha YSR50 in White
[[Image:1987-Yamaha-YSR50-White-5492-2.jpg|left|thumb|1987 Yamaha YSR50 in White]]
File:1987-Yamaha-YSR50-White-5492-2.jpg|left|thumb|1987 Yamaha YSR50 in White
[[Image:1987-Yamaha-YSR50-White-5492-3.jpg|left|thumb|1987 Yamaha YSR50 in White]]
File:1987-Yamaha-YSR50-White-5492-3.jpg|left|thumb|1987 Yamaha YSR50 in White
</gallery>
<br style="clear: left"/>
<br style="clear: left"/>




==1990==
==1990==
<gallery mode="slideshow">
[[Image:1990-Yamaha-YSR50-Black-8302-0.jpg|left|thumb|1990 Yamaha YSR50 in Black]]
File:1990-Yamaha-YSR50-Black-8302-0.jpg|left|thumb|1990 Yamaha YSR50 in Black
[[Image:1990-Yamaha-YSR50-Black-8302-1.jpg|left|thumb|1990 Yamaha YSR50 in Black]]
File:1990-Yamaha-YSR50-Black-8302-1.jpg|left|thumb|1990 Yamaha YSR50 in Black
[[Image:1990-Yamaha-YSR50-Black-8302-2.jpg|left|thumb|1990 Yamaha YSR50 in Black]]
File:1990-Yamaha-YSR50-Black-8302-2.jpg|left|thumb|1990 Yamaha YSR50 in Black
[[Image:1990-Yamaha-YSR50-Black-8302-3.jpg|left|thumb|1990 Yamaha YSR50 in Black]]
File:1990-Yamaha-YSR50-Black-8302-3.jpg|left|thumb|1990 Yamaha YSR50 in Black
<br style="clear: left"/>
</gallery>
 


==1991==
==1991==
<gallery mode="packed-hover">
[[Image:1991-Yamaha-YSR50-Black-3420-0.jpg|left|thumb|1991 Yamaha YSR50 in Black]]
File:1991-Yamaha-YSR50-Black-3420-0.jpg|left|thumb|1991 Yamaha YSR50 in Black
[[Image:1991-Yamaha-YSR50-Black-3420-1.jpg|left|thumb|1991 Yamaha YSR50 in Black]]
File:1991-Yamaha-YSR50-Black-3420-1.jpg|left|thumb|1991 Yamaha YSR50 in Black
<br style="clear: left"/>
</gallery>
 




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==See Also==
==See Also==
*[[Yamaha YSR80]]
*[[Yamaha YSR80]]
==References==
{{reflist}}
{{Yamaha}}
{{Yamaha}}


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[[Category:Pocket bikes]]
[[Category:Pocket bikes]]
[[Category:50cc displacement motorcycles]]
[[Category:50cc displacement motorcycles]]
[[Category:50cc sportbike motorcycles]]
[[Category:50cc sportbike motorcycles]]
[[Category:50cc sportbike motorcycles]]

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