do all harleys have wishbone frames?

hows it going , kinda new just joined , living in vegas ! names mikey nice to meet everybody. i have a question on all harleys they are all wishbone frames right? from the beginning of harley to present? :headbange thanks mikey

If you include any H-D ever built from the first to the present, I believe the answer is no.

If you include any H-D ever built from the first to the present, I believe the answer is no.

My neighbor says his 56 pan was a single downtube.

I'm not sure of exact years and models, but back in the rigid frame days (1957 and prior) at least some were what you would call wishbone framed, that is having curved front down tubes. I think all swingarm frames are what you would call "straight leg", having straight down tubes.