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  • June 15, 2025, 03:57:16 PM

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Author Topic: bore up-sizing an OS FS-40 into a 56!  (Read 1224 times)

Offline Martin Quartim

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bore up-sizing an OS FS-40 into a 56!
« on: May 17, 2025, 10:12:26 PM »
Old Enya's never die, they just run stronger!

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Offline spare_parts

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Re: bore up-sizing an OS FS-40 into a 56!
« Reply #1 on: May 18, 2025, 06:10:59 AM »
I have an FS-40S I put the 48/52 piston and cylinder into many years ago. Used the stock rod. It didn't make significantly more power until I added the intake and carb from the 52.
Greg

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