Kawasaki KZ400 Parts (1974–1984) – OEM & Aftermarket Motorcycle Parts
Looking for high-quality Kawasaki KZ400 parts? Whether you ride an early KZ400 or a later variant, this collection includes the essential components you need to restore, maintain, or keep one of Kawasaki’s most successful twin-cylinder motorcycles on the road.
The Kawasaki KZ400 was originally introduced in 1974 as a 398cc air-cooled parallel twin, and remained in production through the early 1980s, with some later models increasing displacement to 440cc. Built in Akashi, Japan, and later at Kawasaki’s Lincoln, Nebraska plant, the KZ400 holds an important place in motorcycling history — making Kawasaki the first foreign motorcycle manufacturer to operate a production plant in the United States.
Marketed as fuel-efficient, dependable transportation, the KZ400 proved wildly successful, outselling Honda in the 400cc twin market throughout much of the 1970s. Early models experienced issues such as oil leaks and unstable idle, but Kawasaki addressed these concerns beginning in 1977 with redesigned carburetors and improved oil passages. Depending on trim level, KZ400 models ranged from bare-bones transportation to more fully equipped versions featuring electric and kick starters, front disc brakes, and even fairings and saddlebags on Deluxe models.
Quality KZ400 Parts – Built for Maintenance & Long-Term Reliability
At Old Bike Barn, we specialize in hard-to-find Kawasaki KZ400 replacement parts to keep these reliable vintage twins running strong. Whether you're performing routine maintenance, reviving a long-stored motorcycle, or maintaining a daily rider, this collection provides the parts you need to do it right.
This page includes: engine gasket sets and seal kits, carburetor rebuild kits and fuel system components, fork seals and suspension parts, throttle, clutch, and brake cables, OEM-style levers, grips, and control hardware, front and rear brake pads and shoes, and other essential service items commonly needed on aging KZ400 models.
All parts are curated specifically for Kawasaki KZ400 motorcycles, ensuring proper fitment and dependable performance. As original factory parts become discontinued, we focus on keeping critical maintenance and replacement components available so these classic Kawasaki's can stay on the road.
Why Choose Old Bike Barn?
Hard-to-find OEM and aftermarket parts, accurate model-specific fitment, inventory curated by riders who wrench, and friendly support from vintage motorcycle specialists — that’s why riders trust Old Bike Barn for Kawasaki KZ400 motorcycle parts. We help keep classic Japanese motorcycles alive, one project at a time.
Building a Custom KZ400?
Some parts on a custom build are not model-specific. If you’re changing handlebars, mirrors, lighting, controls, shocks, exhaust pieces, fuel line, or hardware, visit our universal and custom motorcycle parts collection.
These parts are useful for cafe racers, brat builds, trackers, choppers, and garage-built vintage motorcycles, but they are not guaranteed to fit every bike without checking. Always compare measurements, mounting style, clearance, and product notes before ordering.