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720 CC piston?

After a long search, I will soon have a liner-less cylinder for my M21. I would like to make it a 720CC which means I need a 90MM piston. Who has one??????


Re: 720 CC piston?

i too ,would like to know this as well.

Re: 720 CC piston?

From memory one that works is a VW 1800 cc piston and being an air cooled engine piston it will handle the big clearences used in out engines.

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