Classic and Classy Motorcycles Ltd

Historical Context

The 1973 Harley-Davidson Ironhead Sportster XLH reflects a pivotal period in the evolution of Harley’s Sportster line. Introduced in 1957, the Sportster series quickly established itself as a rugged and powerful alternative to British motorcycles of the era. By the early 1970s, the Ironhead engine had become a defining feature of the series. Named for its cast iron cylinder heads, the Ironhead offered a raw riding experience, distinct sound, and unmistakable Harley-Davidson character. The XLH variant in 1973 was equipped with an electric starter, appealing to riders who wanted traditional style with more modern functionality.

Technical Specifications and Features

• Year: 1973
• Make: Harley-Davidson
• Model: Ironhead Sportster XLH
• Engine Displacement: 1000cc (61 cubic inches)
• Engine Type: Air-cooled, OHV 45-degree V-twin (Ironhead)
• Compression Ratio: 9.0:1
• Power Output: Approximately 55 horsepower
• Torque: Approximately 55 lb-ft
• Transmission: 4-speed manual
• Brakes: Drum front and rear (disc front introduced mid-year)
• Fuel System: Carbureted
• Fuel Capacity: 3.2 gallons
• Dry Weight: Approximately 500 pounds
• Key Features: Electric start, teardrop tank, classic Harley styling, Ironhead engine with solid performance.

Project Potential

The 1973 XLH Sportster is a desirable project bike for both restorers and custom builders. It represents a classic era of American motorcycling, and restoring it to original specification showcases its chrome detailing, peanut tank, and period-correct stance. Alternatively, its rugged frame and torquey Ironhead engine make it a popular base for bobbers, choppers, and vintage-style customs. With a strong supply of aftermarket and reproduction parts, this project offers great flexibility for both purists and modifiers alike.

Riding Experience

When properly restored, the XLH provides a uniquely visceral riding experience. The 1000cc Ironhead delivers a deep rumble and plenty of low-end torque, making it enjoyable for cruising and short-distance rides. The electric start, a feature that distinguished the XLH from the kick-only XLCH variant, adds a layer of convenience appreciated by everyday riders. While the handling reflects the technology of its time—with modest suspension and braking—the Sportster's narrow frame and upright seating position provide solid control and an engaging ride.

Legacy and Collectibility

The 1973 Harley-Davidson XLH occupies a key place in the Ironhead Sportster lineage. It was among the last models to retain Harley’s raw mechanical feel before more modern updates began to soften the ride. As a result, collectors and vintage motorcycle enthusiasts value the 1973 XLH for its authenticity, simplicity, and distinctive American style. Restoring this bike not only brings a piece of Harley-Davidson’s heritage back to life but also ensures its place on the road and in classic collections for years to come.