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Wossner Piston upgrade reviews ?

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 I am stripping my 2004 EXC 400 RFS motor and will replace the piston. 

 Does anyone have any experience with high compression pistons? Wossner for example.

Thanks in advance.

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I had a wossners in my snowmobile, the wrist pin hole in the piston opened up after 1 season enough that the piston hit the head. They would not stand behind it even after I sent the piston to them.

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Wossner makes FANTASTIC pistons...however I have run into some minor interference in the dome and the head on the high comp pistons.  This was on a big bore though...

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