Re: ’58 Big Twin Lower Crank Seal

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February 12, 2017 at 6:37 pm #52879
chris-p
Participant
    quote Billy J:

    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?

    1. Yes if you have one available
    2. Yes they do.
    3. Very first RD10 (1951) used the carbon seals top and bottom of crank.