Difference between revisions of "Yamaha YSR50"

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{{Infobox Motorcycle
{{Motorcycle
|name            = Yamaha YSR50
|name            = Yamaha YSR50
|image            =  
|photo= 1987-Yamaha-YSR50-White-5492-0.jpg
|aka              =  
|aka              =  
|manufacturer    = [[Yamaha]]
|manufacturer    = Yamaha
|parent_company  =  
|parent_company  =  
|production      = 87-93
|production      = 87-93
Line 10: Line 10:
|successor        =  
|successor        =  
|class            =  
|class            =  
|engine          = 50cc
|engine          = 49.3cc [[2-stroke]], single cylinder, [[air-cooled]] with [[reed valve]]
|bore_stroke      =  
|bore_stroke      = 40.0mm x 39.2mm
|compression      =  
|compression      = 7.4:1
|top_speed        =  
|top_speed        =38 mph
|power            =  
|power            = 7 [[horsepower]] @ 8,800 [[RPM]]
|torque          =  
|torque          = 0.59 kg-m @ 8,500 RPM
|ignition        =  
|ignition        =  
|spark_plug      = {{sparkplug|B8HS}} '87-93
|fuel_system      = Carburetor, Mikuni VM16SH
|battery          = {{battery|6N4-2A-2}} '87-93
|spark_plug      = {{sparkplug|NGK B8HS}} '87-93
|transmission    =  
|battery          = {{battery|YUASA 6N4-2A-2}} '87-93
|transmission    = 5-speed constant mesh
|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        =  
|wheelbase        = 1050mm
|length          =  
|length          = 1575mm
|width            =  
|width            = 635mm
|height          =  
|height          = 930mm
|seat_height      =  
|seat_height      = 650mm
|dry_weight      =  
|dry_weight      = 75kg
|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          =  
|related          = [[Yamaha RX50]] (contained same engine), [[Yamaha YSR80]]
|competition      =  
|competition      = [[Honda NSR50]], [[Aprilia RS50]]
}}
}}


The '''Yamaha YSR50''' is a [[motorcycle]] produced by [[Yamaha]] from 1987 to 1993.
The '''Yamaha YSR50''' is a [[motorcycle]] produced by [[Yamaha]] from 1987 to 1993.


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]].
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==
[[Image:1987-Yamaha-YSR50-White-5492-0.jpg|left|thumb|1987 Yamaha YSR50 in White]]
<gallery mode="packed-hover">
[[Image:1987-Yamaha-YSR50-White-5492-1.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-5492-2.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-5492-3.jpg|left|thumb|1987 Yamaha YSR50 in White]]
File:1987-Yamaha-YSR50-White-5492-2.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==
[[Image:1990-Yamaha-YSR50-Black-8302-0.jpg|left|thumb|1990 Yamaha YSR50 in Black]]
<gallery mode="slideshow">
[[Image:1990-Yamaha-YSR50-Black-8302-1.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-8302-2.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-8302-3.jpg|left|thumb|1990 Yamaha YSR50 in Black]]
File:1990-Yamaha-YSR50-Black-8302-2.jpg|left|thumb|1990 Yamaha YSR50 in Black
<br style="clear: left"/>
File:1990-Yamaha-YSR50-Black-8302-3.jpg|left|thumb|1990 Yamaha YSR50 in Black
</gallery>
 


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




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


[[Category:Yamaha motorcycles|YSR50, Yamaha]]
[[Category:Yamaha motorcycles|YSR50, Yamaha]]
[[Category:Pocket bikes]]
[[Category:Pocket bikes]]
[[Category:50cc displacement motorcycles]]
[[Category:50cc sportbike motorcycles]]
[[Category:50cc sportbike motorcycles]]

Latest revision as of 20:08, 23 November 2019

1987-Yamaha-YSR50-White-5492-0.jpg
Yamaha YSR50
Manufacturer
Production 87-93
Engine
49.3cc 2-stroke, single cylinder, air-cooled with reed valve
Bore / Stroke 40.0mm x 39.2mm
Compression ratio 7.4:1
Top Speed 38 mph
Horsepower 7 horsepower @ 8,800 RPM
Torque 0.59 kg-m @ 8,500 RPM
Fuel System Carburetor, Mikuni VM16SH
Spark Plug NGK B8HS '87-93
Battery YUASA 6N4-2A-2 '87-93
Transmission 5-speed constant mesh
Final Drive Chain: 420x100
Front Sprocket 12T
Rear Sprocket 44T
Front Tire 3.50-12 '87-93
Rear Tire 4.00-12 '87-93
Wheelbase 1050mm
Length 1575mm
Width 635mm
Height 930mm
Seat Height 650mm
Weight 75kg (dry),
Recommended Oil Yamalube 10w-40
Related Yamaha RX50 (contained same engine), Yamaha YSR80
Competition Honda NSR50, Aprilia RS50
Manuals Service Manual

Brochures ·


The Yamaha YSR50 is a motorcycle produced by Yamaha from 1987 to 1993.

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[edit | edit source]

Yamaha YSR 50 and YSR 80 sport models goes on sale in Japan in 1986, and had the look of a re-shaped, scaled-down 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.

1987[edit | edit source]



1990[edit | edit source]


1991[edit | edit source]


1992[edit | edit source]

1992 Yamaha YSR50