(For HD OHV) I see several vendors offer crank pins in 3 hole and 1 hole versions. Which is preferred and why?
Are there specific configurations that require one or the other?
(For the sake of discussion, how about the years 1941, 1951, 1969?)
Are there specific configurations that require one or the other?
(For the sake of discussion, how about the years 1941, 1951, 1969?)
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