Talk:Harley-Davidson Knucklehead engine

Photo?
A photo of the knucklehead engine would be helpful, so we laypeople can see what the article is talking about (with regard to the description of the valve covers). —Preceding unsigned comment added by 24.6.66.193 (talk) 08:40, 14 April 2008 (UTC)

Three Stooges / Insult
I usually hear the term "knucklehead" used as an insult, not as a motorcycle type. I believe it comes from the Three Stooges. Which usage was the source? 70.63.94.184 (talk) 15:58, 4 October 2008 (UTC)
 * I don't understand. Maikel (talk) 11:05, 9 August 2020 (UTC)

Photo
A picture where you can get a good look at the "knuckles" would be great. Maikel (talk) 11:04, 9 August 2020 (UTC)