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Old 11-16-2017, 02:01 AM
neo71665 neo71665 is offline
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Join Date: Jun 2017
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Not sure on a gy6 but if you shove too big of a valve in the head the valve opening is bigger than the piston opening. That can lead to the valve basically being clamped shut between the head and jug in this case. It's not common but I have seen it happen before and I'm not real experienced on these so it would be something I would look for.


Other than that make sure the piston isn't gonna slap the valve. That is pretty common on other engines when toying with the valve size and lift specs.

Last edited by neo71665; 11-16-2017 at 02:04 AM.
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