Re: ’58 Big Twin Lower Crank Seal

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February 12, 2017 at 5:26 pm #52875
William Jatzek
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    Question 1. So if you can use the quad seal as an upgrade to replace ”O” ring inside carbon seal for earlier big twins.Would you also on earlier big twins use the later carbon ring # 302538 with the smaller surface area? Question 2. Would a quad seal fit in the earlier flat carbon seal? Question 3. what is the earliest year big Twin that would accept this modification?