Classic and Classy Motorcycles Ltd

Historical Context

The 1974 Kawasaki H2 Mach IV 750cc holds a legendary place in motorcycle history. Introduced in 1972 as the bigger brother to the wild H1 500, the H2 took Kawasaki's performance ambitions to a whole new level. Designed during the height of the horsepower wars, the H2 featured a 748cc two-stroke inline triple-cylinder engine and quickly gained notoriety for its explosive power delivery and unmatched acceleration. While praised for its raw speed, it also earned a reputation for being challenging to handle—earning it a fearsome nickname among riders. By 1974, the H2 was in its third production year, with minor refinements improving its rideability while retaining its brutal performance character.

Technical Specifications and Features

• Year: 1974
• Make: Kawasaki
• Model: H2 Mach IV
• Engine Displacement: 748cc
• Engine Type: Air-cooled, two-stroke, inline 3-cylinder
• Compression Ratio: 7.0:1
• Power Output: Approximately 74 horsepower
• Torque: Approximately 57 lb-ft
• Transmission: 5-speed manual
• Brakes: Single disc front, drum rear
• Fuel System: Triple Mikuni carburetors
• Fuel Capacity: 4.5 gallons
• Wheelbase: 56.3 inches
• Dry Weight: Approximately 450 pounds
• Top Speed: Over 120 mph
• Key Features: CDI ignition, oil injection system, signature triple exhaust, and lightning-quick powerband.

Project Potential

A 1974 Kawasaki H2 Mach IV project offers both challenge and reward. These bikes are now considered icons of the two-stroke era and are highly desirable among collectors. Restoring one to factory specification involves attention to detail in areas such as paint schemes, correct decals, triple exhausts, and carb tuning. Many restorers choose to retain its stock setup due to its historical value, though performance upgrades and braking improvements are also common. The H2’s robust engine design and wide aftermarket support ensure it remains a feasible and exciting restoration project for any vintage motorcycle enthusiast.

Riding Experience

Restored to working condition, the H2 Mach IV offers an unforgettable ride. Its 748cc two-stroke triple delivers a violent surge of power in the midrange, creating thrilling acceleration that was unmatched in its day. The handling, while adequate for the time, is stiff by modern standards—requiring experienced hands to control its performance. The bike’s front disc and rear drum brakes provide modest stopping power, and the suspension is suited for spirited straight-line riding rather than corner-carving. Despite its quirks, the experience is raw, mechanical, and deeply engaging—true to the spirit of early 1970s performance motorcycles.

Legacy and Collectibility

The Kawasaki H2 Mach IV is now firmly established as a cult classic. Its place in history as one of the fastest and most fearsome production motorcycles of its time ensures high demand among collectors. The 1974 model year is particularly prized for offering slightly improved rideability while retaining the original’s outrageous two-stroke character. Restoring one is not just about reviving a motorcycle—it’s about preserving a machine that defined an era of speed, risk, and innovation. The H2 remains a symbol of Kawasaki’s bold engineering and a cornerstone of high-performance motorcycling heritage.