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{{Motorcycle
==1974 MX250A==
|name            = Yamaha MX250
[[Image:1974-Yamaha-MX250A-Yellow-0.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-1.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-2.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-3.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-5.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-6.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4913-0.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4913-1.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4913-2.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4913-3.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4913-4.jpg|left|thumb|1974 Yamaha MX250A in Yellow]][[Image:1974-Yamaha-MX250A-Yellow-4913-5.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
|photo= 1974-Yamaha-MX250A-Yellow-4.jpg
<br style="clear: left"/>
|aka              =
|manufacturer    = Yamaha
|parent_company  =
|production      = 1973 - 1975
|model_year      =
|predecessor      =
|successor        =
|class            =
|engine          = 250
|bore_stroke      =
|compression      =
|top_speed        =70 mph
|power            =
|torque          =
|ignition        =
|spark_plug      = {{sparkplug|NGK B8EG}} '73-75
|battery          =
|transmission    =
|frame            =
|suspension      =
|brakes          =
|front_tire      = {{tire|3.00-21}} '73-75
|rear_tire    = {{tire|4.00-18}} '73-75
|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          = [[Yamaha MX80]]<br />[[Yamaha MX100]]<br />[[Yamaha MX175]]<br />[[Yamaha MX250]]<br />[[Yamaha MX360]]
|competition      =
|final_drive= {{chain|520x104}} ‘73-74<ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
|front_sprocket= 14T ‘73-74<ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
|rear_sprocket= 51T ‘73-74<ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
}}


The '''Yamaha MX250''' is a [[motorcycle]] produced by [[Yamaha]] from 1973 to 1975.


The year 1972 was a good one for [[Yamaha]], which, in its second season of works participation in [[motocross]] Grand Prix, finished second in the 250cc class with [[Hakan Andersson]] and fifth in the 500 class with [[Van Velthoven]], while the [[Yamaha YZ250|YZ250]] of [[Gary Jones]] won the [[AMA]] championship.
==Redesigned Frames==
Yamaha's great strength is its speed of reaction. The 1973 MX privateer's machine was a genuine replica of the 1972 works machines. The cycle part was completely redesigned, with the engine set lower in a new double cradle frame, while the rear shockers introduced a separate hydraulic fluid tank with external adjustment of the damping. This marked the beginning of a trend towards ever greater sophistication of suspension systems. It was underlined at Yamaha by the introduction of cantilever rear suspension in 1973.
==World Champion==
The major revolution in two-stroke engine design, which was to bring automatic intake valves -first on the cylinder, then in the crankcase -and valves in the exhaust, still lay in the future, so the MX250/[[Yamaha MX360|MX360]] Yamahas of 1973 were somewhat lacking in flexibility. Yamaha was world 250cc motocross champion in 1973 with Hakan Andersson, while bikes entered by the French importer Sonauto won the national 125cc championship with Jallat riding and came second in the 500cc class, this time with Drobecq in the saddle.


==1973 MX250==
[[Image:1973-Yamaha-MX-250-Silver-1988-0.jpg|left|thumb|1973 Yamaha MX 250 in Silver]]
[[Image:1973-Yamaha-MX-250-Silver-1988-1.jpg|left|thumb|1973 Yamaha MX 250 in Silver]]
[[Image:1973-Yamaha-MX-250-Silver-1988-2.jpg|left|thumb|1973 Yamaha MX 250 in Silver]]
[[Image:1973-Yamaha-MX-250-Silver-1988-3.jpg|left|thumb|1973 Yamaha MX 250 in Silver]]
<br style="clear: left"/>
*Starting Engine#: 364-000101
==1974 MX250A==
[[Image:1974-Yamaha-MX250A-Yellow-0.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-1.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-2.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-3.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-5.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-6.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4913-0.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4913-1.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4913-2.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4913-3.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4913-4.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250A-Yellow-4913-5.jpg|left|thumb|1974 Yamaha MX250A in Yellow]]
[[Image:1974-Yamaha-MX250-Yellow-5479-0.jpg|left|thumb|1974 Yamaha MX250 in Yellow]]
[[Image:1974-Yamaha-MX250-Yellow-5479-1.jpg|left|thumb|1974 Yamaha MX250 in Yellow]]
[[Image:1974-Yamaha-MX250-Yellow-5479-2.jpg|left|thumb|1974 Yamaha MX250 in Yellow]]
[[Image:1974-Yamaha-MX250-Yellow-5479-3.jpg|left|thumb|1974 Yamaha MX250 in Yellow]]
[[Image:1974-Yamaha-MX250-Yellow-5479-4.jpg|left|thumb|1974 Yamaha MX250 in Yellow]]
<br style="clear: left"/>
* Starting Engine#: 364-020101
==1975 MX250B==
==1975 MX250B==
[[Image:1975-Yamaha-MX250B-White-2497-0.jpg|left|thumb|1975 Yamaha MX250B in White]]
[[Image:1975-Yamaha-MX250B-White-2497-0.jpg|left|thumb|1975 Yamaha MX250B in White]][[Image:1975-Yamaha-MX250B-White-2497-1.jpg|left|thumb|1975 Yamaha MX250B in White]][[Image:1975-Yamaha-MX250B-White-2497-2.jpg|left|thumb|1975 Yamaha MX250B in White]][[Image:1975-Yamaha-MX250B-White-2497-3.jpg|left|thumb|1975 Yamaha MX250B in White]]
[[Image:1975-Yamaha-MX250B-White-2497-1.jpg|left|thumb|1975 Yamaha MX250B in White]]
[[Image:1975-Yamaha-MX250B-White-2497-2.jpg|left|thumb|1975 Yamaha MX250B in White]]
[[Image:1975-Yamaha-MX250B-White-2497-3.jpg|left|thumb|1975 Yamaha MX250B in White]]
<br style="clear: left"/>
<br style="clear: left"/>
* Starting Engine#: 509-000101
==References==
{{reflist}}
{{Yamaha}}


[[Category:Yamaha motorcycles|MX250, Yamaha]]
[[Category:Yamaha motorcycles|MX250, Yamaha]]
[[Category:Yamaha MX series]]

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