1985 kdx 200 piston substitute

Discussion specific to the various air-cooled KDX models sold in the USA
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ninjafreek
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1985 kdx 200 piston substitute

Post by ninjafreek »

Ok I hate this being my first post to ask but.
I read where some people either tried or may be using later model year pistons in the 84-85 models
Can someone please confirm that they have ran this combo
Thanks In Ad vance
KDX Geoff
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1985 kdx 200 piston substitute

Post by KDX Geoff »

Did you see this ?

I haven't run this piston myself as my 200 is a 240.

http://www.kdxrider.net/forums/viewtopi ... 19&t=21662
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Re: 1985 kdx 200 piston substitute

Post by KDXGarage »

Search for a post from KDX Geoff on the Wossner piston
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F.I.S.H-1
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Re: 1985 kdx 200 piston substitute

Post by F.I.S.H-1 »

KDX Geoff wrote:Did you see this ?

I haven't run this piston myself as my 200 is a 240.

http://www.kdxrider.net/forums/viewtopi ... 19&t=21662
Geoff, the way I read that is pv piston will work on 83-85 jug without modification?

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ninjafreek
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1985 kdx 200 piston substitute

Post by ninjafreek »

I went to the wossner site I'm in need of a .020 over what you should I get? I'm trying to convert but not good at this
Thanks for the info guys
ninjafreek
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1985 kdx 200 piston substitute

Post by ninjafreek »

Has anyone had an issue with the wiseco piston Rings hanging on the ports? Because of the pin location?
Just asking
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Re: 1985 kdx 200 piston substitute

Post by KDXGarage »

Has your cylinder been sleeved??
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ninjafreek
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1985 kdx 200 piston substitute

Post by ninjafreek »

Yea it has been not sure who did the liner as I just bought the bike. I found a 66.5mm Thanks for the help
KDX Geoff
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Re: 1985 kdx 200 piston substitute

Post by KDX Geoff »

F.I.S.H-1 wrote:
KDX Geoff wrote:Did you see this ?

I haven't run this piston myself as my 200 is a 240.

http://www.kdxrider.net/forums/viewtopi ... 19&t=21662
Geoff, the way I read that is pv piston will work on 83-85 jug without modification?
The Wossner pv piston has the bottom ring a bit higher on the piston than the Kawasaki pv piston and on the resleeved barrel l have, it stops above the port so there's no issue with the ring end entering the port.

So yes, no need to modify anything but check first as you can't assume that your resleeved barrel is exactly the same as mine.

This is a Kawasaki pv piston in a non pv barrel at bdc.
Image

This is the Wossner pv piston in the non pv barrel at bdc. The ring peg on the bottom is on the left (the Kawasaki ring peg is on the right on their piston) and the ring end is not exposed to the port.
Image

This is the pv barrel and piston. Very different porting and there's no issue with the ring ends.
Image
Ray Sanchez
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1985 kdx 200 piston substitute

Post by Ray Sanchez »

ninjafreek wrote:Ok I hate this being my first post to ask but.
I read where some people either tried or may be using later model year pistons in the 84-85 models
Can someone please confirm that they have ran this combo
Thanks In Ad vance
1986 oem piston is very,very similar,i own a 1985 kdx 200 A3 and i just find the oem 85 and the oem 86 and are almos the same,in fact the only thing they change between this two years are the 86 has a power valve but is air cooled. it also uses the same piston rings.
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