Will an '87 piston work in a '83 200 ?

[mjlovejoy4]

So I am a complete idiot and couldn't follow the technical aspects of this post if I tried. At the end if I read the last post right you can make my 200 a 240 and that would eliminate my not finding a piston kit problem. Sorry such a newbie


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[KDX Geoff]

My 200 has had the barrel sleeved out to 72.5mm from the standard 66mm.

I found a piston (out of a later model 240cc conversion) where the main measurements were right other than the skirt length so l took off the extra 6 odd mm and matched the profile of the piston that came out. It wasn't pull the old piston out and put the new one in.

If your bike has a standard 66mm bore, buy this Wossner piston and check the ring pin location in your barrel and fit it or get some help if you need too Much easier than converting to 240cc.

[mjlovejoy4]

My 200 has had the barrel sleeved out to 72.5mm from the standard 66mm.

I found a piston (out of a later model 240cc conversion) where the main measurements were right other than the skirt length so l took off the extra 6 odd mm and matched the profile of the piston that came out. It wasn't pull the old piston out and put the new one in.

If your bike has a standard 66mm bore, buy this Wossner piston and check the ring pin location in your barrel and fit it or get some help if you need too Much easier than converting to 240cc.

I guess when the time comes I'll have to find some help here in South East Oklahoma I've never worked on a dirt bike but I really like this bike and want to keep it around a good long time. If anyone is around this area I would be happy to drive a bit to get this bike in top shape. Everyone I've talked to around here just says I'm out of luck


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[Pukwudgie]

Can anyone confirm that they've fit and run a Wossner '86-'06 in a '83-'85 jug? I'm researching the topic and there are conflicting takes on whether you need to modify the piston skirts and, or if there is interference between rings and ports etc. Its also been stated there is added head clearance which would lead to lower compression would it not? If anyone could share experience fitting one of these would be great. Thanks

[KDXGarage]

Welcome to kdxrider.net. Thanks for joining us and participating.

[twowheelsfast]

Sorry for reviving this, but has anyone confirmed that this wossner piston works in a 85? I dont see any first hand accounts of anyone using it, only people saying to try it.

[Chuck78]

The '86-'06 KDX 200 pistons definitely have successfully been used in the '83-'85 KDX 200. As I have never had direct experience in this, I cannot tell you what modifications are needed to successfully run this later piston, however, I am fairly certain from reading others' experiences that some trimming of the skirt is necessary, and checking of ring end gap locating pin orientations is 100% a necessity for success, as they could potentially need relocated.