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Mystery 850 pistons

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Hi  guys

I'm just stripping an 850 mk3 motor for rebuild. I have found it is fitted with these pistons. They are 79mm and forged. There are no markings at all.

They look good enough to refit, but I will check weights and clearances first.

The bike has been repatriated from the USA so maybe one of our American cousins may have an idea.

Cheers

Paul N

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Haven't a clue who manufactured them other than they look very high compression.

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Those pistons look like they were made by an American company MM as i have a pair that look the same for the 750 engines. 

 


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