1985 200 piston kit

froggy · Post by **froggy** » 09:20 am Feb 10 2013

I am trying to find a piston kit for my 85 kdx 200 with no luck. Will a piston from a 86-88 200 work? Any help would be greatly appreciated. I love my 85 but it needs the cylinder redone with a new piston kit to keep her running for years to come.

froggy · Post by **froggy** » 08:27 am Mar 24 2013

No replys, so I will post what I found out. A 86-2006 uses the same piston, so I ordered one for my 1985. Their is a difference. I ordered a weisco and the skirt is a little too long. I filed down the skirt a couple of mm's and now it works fine. I raced a vintage race race last weekend with no issues. This may be helpfull to others as their is not any kits available for the 83-85 200's. A newer piston has a bigger hole in the back of the piston over a stock one, but other than that the pistons are the same, with the exception of the longer skirt. Their was a little lip on the weisco piston skirt, that is what I filed down with a bench sander, took 5 minutes, very simple.
Hope this may help somebody in the future.

Post by **KDXGarage** » 08:48 am Mar 24 2013

Thank you for sharing your findings.

freight · Post by **freight** » 09:26 pm May 09 2013

gonna give this a shot as partzilla cancelled my order. thanks again for sharing. freight

De250r · Post by **De250r** » 04:56 pm Jul 12 2013

Thanks for the tip. I've been wondering that very question

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GS · Post by GS » 12:56 pm Jul 14 2013

Thanks for the follow-up Froggy, that is very helpful!

De250r · Post by **De250r** » 11:25 am Aug 06 2013

I pulled my 84 apart and it was over bored and sleeved and needed another bore so I orderd an 68mm Wiseco for a newer kdx. I got the piston and its exactly the same height. Doesn't seem to be a lip to grind off.

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