FIM Motocross classes

funktree

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#2
not an expert by any means, but I believe one of em is an open class, MX3 I think it is. It probably used to mean something much different before the 450 4 stroke revolution, now it seems most are on the 450 in either mx1 or mx3.
 
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#3
funktree is correct,

MX 1 is the old 250cc class (450F)

MX 2 is the old 125cc class (250F)

MX 3 is the old 500cc Open Class (450F)

I can see where the confussion comes from. The 450 4-stroke has taken over the 250 2-stroke class. Since no one "really" makes a 500cc 2-stroke, the 450 4-stroke is also the open class bike. Now wouldn't it be cool to see a Pro rider show up with a CR or KX AF :cool:

http://www.motocrossmx1.com/eMag/motocrossguide2007.pdf
 
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XRpredator

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#4
snb73 said:
. . . Since no one "really" makes a 500cc 2-stroke, the 450 4-stroke is also the open class bike.
the upper limit for MX3 for a four stroke is 650cc
 
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#7
Also, the MX3 GPs are not raced at the same time/tracks as MX1 and MX2.