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Yamaha MX250

From CycleChaos
Yamaha MX250
Manufacturer Yamaha
Production 73-75
Engine 250
Sparkplug B8EV '73-74 , '75
Front Tire 3.00-21 '73-74 , '75
Rear Tire 4.00-18 '73-74 , '75
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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 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/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

1973 Yamaha MX 250 in Silver
1973 Yamaha MX 250 in Silver
1973 Yamaha MX 250 in Silver
1973 Yamaha MX 250 in Silver


  • Starting Engine#: 364-000101

1974 MX250A

1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250A in Yellow
1974 Yamaha MX250 in Yellow
1974 Yamaha MX250 in Yellow
1974 Yamaha MX250 in Yellow
1974 Yamaha MX250 in Yellow
1974 Yamaha MX250 in Yellow


  • Starting Engine#: 364-020101

1975 MX250B

1975 Yamaha MX250B in White
1975 Yamaha MX250B in White
1975 Yamaha MX250B in White
1975 Yamaha MX250B in White


  • Starting Engine#: 509-000101