greetings, looking for HD cyl numbers info

[gww]

howdo, is there a place on here that would have data/info for identifying 50s,60s,70s HD cyls. if you could point it out to me i appreciate it. i have a old rat hole of cyls. id like to id to sell. thanks. gary

[Chris Haynes]

They are all date coded on the base flange. Usually with a letter, number, number. Like C 14 53 which would be March 14th 1953. The letter i was not used.

[Rubone]

Short answer is no. Longer version is that there are physical differences besides casting and date codes along with the fact date codes in some models repeat, so pictures are needed to identify them. And that isn't in a book somewhere or a simple chart.

[gww]

much thanks.. would i bore the blazzes out of folks if i shared photos and info? and where would i do so? not sure there's any call for them anyway. thanks gary

[exeric]

Gary, the 'Harley-Davidson' for sale thread would be the best place. H-D cylinders do have unique characteristics and the people looking for the exact 'right' year are going to be very picky. I also happen to be looking for early Panhead cylinders but my requirement is that they be usable and I'm not that concerned about year codes, etc. If you have a pair of early cylinders that are still under the bore limit, I'd be very interested. Send me a P.M. if you do. Thanks, Eric

[gww]

thank you. going to stick a list of the ones i,ve wrote down so far. see if there's anything there that would help ya before i start listing. thanks gary

[gww]

Harley Cyls
cast# other#s bore cond.

16568-66 138-70 3.466 clean
16568-66 341-70 3.475 clean
16568-66 n/a 3.478 clean (one broken fin)
16568-66 n/a 3.466 clean
16568-7 BF 3.452 clean
16587-66 1229 214-71 3.470 clean
16568-66 BF 3.447 clean
16568-66 n/a 3.467 clean
16568-66 BF 3.489 clean
1656///// BF 3.459 will clean w/hone
16568-78 0188 3.530 clean
16568-78 020879 3.421 clean
16568-78 BF 0179 3.535 will clean w/hone (one broken fin)
16587-78 BF 0670 3.505 will clean w/hone
16568-78 BF 6930 3.501 clean
16568-66 BF 3.457 clean
16587-78 3.531 needs bore
S&S 80R 1175BF 3.494 clean
S SF ? 3.518 clean
16568-66 3.437 will clean w/hone

sporty
16581-57 J 4-0 3.016 will clean w/hone
16581-57 L 13-0 3.017 will clean w/hone
16561-57 K 14-0 3.028 will clean w/hone
16561-57 K 29-0 3.016 will clean w/hone
sporty heads 900
6682-71 BC clean
6684-71 BC 3 broken fins