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F vs FL

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Old Mar 2, 2025 | 01:00 PM
  #1  
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47FL
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From: Orygun
Default F vs FL

What is the difference between the Knucklehead F and FL engines. I know it is the compression. How is this achieved?
Thanks for any information.
 
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Old Mar 2, 2025 | 05:14 PM
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johnjzjz
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From: la la land jerzey
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Compression in piston dome - and cylinder head port sizing is also at play as is the carb Venturi diameter
 
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Old Mar 11, 2025 | 07:53 PM
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rizzo
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From: Black Hills
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John, you're like Mr. Wizard !! An encyclopedia of knowledge and we're lucky to have you here. Thanks for all your contributions.
 
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