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Author Topic: Eligibility for Pre 90  (Read 1466 times)

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Offline KTM47

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Eligibility for Pre 90
« on: November 18, 2013, 04:58:10 pm »
In the MOMS for the Pre 90 classes in says "Acceptable for Pre 90 class are machines and components built up to and including the 1989 model. The only exception to this rule is where the model remains unaltered after this date."


What I would like to know is what changes were made to the KX 500s after 1989. eg 1990, 1991 etc models.
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Offline g465b

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Re: Eligibility for Pre 90
« Reply #1 on: November 18, 2013, 07:39:20 pm »
changes to 90'KX500 from 89' model         airbox  ,flywheel dia. increased by 22mm  ,kayaba upside down forks,frame gusseting steering head area,  chain adj.axle plates,   swingarm-forged aluminium parts(89 cast)  , foot pegs        g.
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Offline KTM47

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Re: Eligibility for Pre 90
« Reply #2 on: November 19, 2013, 11:37:02 am »
Is it correct that the US model KX 500 had upside down forks in 1989?
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Offline Davey Crocket

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Re: Eligibility for Pre 90
« Reply #3 on: November 19, 2013, 12:14:34 pm »
USA spec 89 KX500 had 46mm conventional forks......the rest of the world got crappy USD forks.....the 46er's are the go.
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