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  1. #1
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    gx390 valve spring?'s

    Hey guys, first time venturing into the honda "big block" gx390 and had some questions I'm hoping you all can help me with.

    I am curious what # valve springs are in the gx390/clones stock, and at what rpm the stock springs start to valve float with the stock cam but governor completely deleted.

    All help and information on gx390 valve springs is greatly appreciated. Thank you!

  2. #2
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    Noone knows spring rate of oem gx390 valve springs, or around what rpm they start to float with the oem gx390 cam?

 

 

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