1964 Harley-Davidson FLH Duo-Glide: Overview

The 1964 Harley-Davidson FLH Duo-Glide was a touring motorcycle known for its impressive design, powerful engine, and comfortable ride. It featured a 74 cubic inch (1208 cc) V-twin engine, which provided plenty of torque and power for long rides. The Duo-Glide name came from its unique rear suspension system, which greatly improved the bike’s handling compared to earlier Harley models.

Engine and Transmission 1964 harley-davidson

The 1964 FLH Duo-Glide was equipped with a 74 cubic inch (1208 cc) V-twin engine, producing approximately 55 horsepower at 4,800 RPM. This pushrod OHV engine utilized a single carburetor and had a compression ratio of 8.5:1. The bike’s power was transferred to the rear wheel via a four-speed foot-shift transmission with a kick starter.

Chassis and Suspension

One of the most notable features of the 1964 Harley FLH Duo-Glide was its frame and suspension design. The chassis consisted of a double cradle frame made from steel tubing, while the Duo-Glide moniker referred to the unique rear suspension system. The swingarm rear suspension provided a more comfortable ride compared to earlier hardtail designs, which were prone to causing discomfort over long distances.

Brakes and Tires

The 1964 Harley-Davidson FLH Duo-Glide came with drum brakes on both the front and rear wheels. The front brake featured a single leading shoe design, while the rear brake used a dual leading shoe setup. The motorcycle rolled on spoked wheels with wire spokes laced to steel rims, measuring 16 inches in diameter at both the front and rear. The tires were typically 5 inches wide on the front wheel and 6 inches wide on the rear wheel.

Electrical System

The electrical system on the 1964 Harley-Davidson FLH Duo-Glide consisted of a 6V battery and a magneto ignition system. While this system was common in motorcycles during that era, it is less efficient than modern 12V or even 24V systems found in modern vehicles.

Styling and Aesthetics

The styling of the 1964 Harley-Davidson FLH Duo-Glide was consistent with other Harley models from that time period. The bike featured large fenders, a teardrop gas tank, and abundant chrome accents throughout its design. The motorcycle’s distinctive appearance has contributed to its enduring popularity among vintage motorcycle enthusiasts.