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Author Topic: Are pre-85 KDX - KX motors interchangable.  (Read 1549 times)

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yz490rules

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Are pre-85 KDX - KX motors interchangable.
« on: October 09, 2009, 03:39:50 PM »
Hi,

I was wondering how interchangable are the parts between a pre-85 KDX250 and KX250 bikes of the same era?

Thanks,

Stephen
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Offline AjayVMX

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Re: Are pre-85 KDX - KX motors interchangable.
« Reply #1 on: October 09, 2009, 04:11:25 PM »
Not very, I think.  From 83 onwards, the KX was watercooled.  Not sure about gearbox parts, but I also doubt they'd be the same.
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yz490rules

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Re: Are pre-85 KDX - KX motors interchangable.
« Reply #2 on: October 09, 2009, 07:25:58 PM »
thanks,

The 84 air cooled kdx looks to be a very similar motor to the 82 kx.

Stephen
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Offline Grunter215

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Re: Are pre-85 KDX - KX motors interchangable.
« Reply #3 on: October 10, 2009, 08:32:53 AM »
KDX  motor is based on the 82 KX.Gasket sets the same.Same clutch cover except for kick shaft hole is bigger on KDX so match up kickstart mechanism/clutch cover fits straight in.Barrel/head same except ports.
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