Knuckleheadhd May 2026

The refers to the iconic overhead-valve (OHV) V-twin engine produced by Harley-Davidson between 1936 and 1947. It earned its nickname from enthusiasts because the distinct, bulbous shape of its rocker boxes resembles the knuckles of a clenched fist. It was the first production Big Twin from Harley-Davidson to feature overhead valves, a major technical leap over the previous "Flathead" models. 🛠️ Key Technical Specifications Engine Type : 45-degree V-twin, pushrod-actuated OHV.

: Introduced a dry-sump system with a mechanical oil pump. 📜 Historical Significance KnuckleheadHD

: Approximately 36–40 horsepower, a significant increase for its time. Transmission : Four-speed constant mesh transmission. The refers to the iconic overhead-valve (OHV) V-twin