1929–1931 Flathead D-Series — Harley-Davidson Engine Print

1929–1931 Flathead D-Series — Harley-Davidson Engine Print

This handmade drawing depicts Harley-Davidson’s pioneering Flathead D-Series, produced from 1929 to 1931 — the company’s first generation of side-valve (flathead) engines. Displacing 45 cubic inches (≈737 cc), the D-Series introduced a new era of reliability and simplicity. Its compact, low-compression design delivered smooth torque, cool running, and exceptional durability — the ideal balance for everyday riders facing the challenges of the Great Depression.

Though modest in displacement, the D-Series laid the foundation for Harley-Davidson’s long-lived Flathead family. Its mechanical layout became the basis for the later R, W, and G (Servi-Car) engines that defined Harley’s reputation for endurance and ease of service.
The D-Series marks the beginning of nearly half a century of side-valve engineering — a true turning point in Harley-Davidson history.

Each print is part of a collector’s series celebrating Harley-Davidson engines across more than a century of history. Perfect for enthusiasts, workshops, or anyone who values vintage engineering and design.

Print Details

• Premium Japanese paper Luster RC 240 g/m²

• Available in two versions: Bright and Dark

• Sizes:

  • A4 — 21 × 29.7 cm (8.27″ × 11.69″)

  • A3 — 29.7 × 42 cm (11.69″ × 16.54″)

  • A2 — 42 × 59.4 cm (16.54″ × 23.39″)

• The color of the printed graphics may slightly differ from that shown in the photos.

• Shipped carefully rolled, ready for framing.

• No frame included.

About the Artwork

Each piece is drawn and produced independently by Billy Cune Art.
All rights to the Harley-Davidson® name and logos belong to their respective owners.
This work is an independent artistic interpretation, unaffiliated with Harley-Davidson Motor Company.

To find out more about copyright please visit this page.

Shipping

Free worldwide shipping on orders over €150.
Orders are carefully packaged and shipped internationally.
Customs or import fees may apply outside the European Union.

To find out more about shipping process please visit this page.

The first of the Flatheads — the 45″ D-Series that shaped Harley-Davidson’s future.