About the Kawasaki KZ400A
Carburetor, engine and brake service for the five-speed KZ400A Deluxe.
The KZ400A Deluxe pairs a five-speed SOHC twin with touring equipment: a fairing, saddlebags and a luggage rack. Those accessories may be missing from a restored or modified motorcycle, so identify the A model from its markings and documentation before choosing parts.
Use the A-series application for engine and intake work
The A engine gasket set, carburetor kit and air filter below each list 1977–1978. The B engine gasket set is a separate application, despite the shared 1978 model year. Compare the carburetors, airbox and master cylinder actually fitted if a previous owner changed the intake or controls.
Model differences that affect parts selectionKawasaki KZ400A model guide
Compare the details that affect parts selection, then confirm the application of each part for your motorcycle.
Factory sheet groups A1 and A2
A1/A2 · Deluxe equipment
A fairing, hard luggage and a rack were part of the described A specification. Paint and accessories alone are unreliable identifiers on a restored bike.
Parts checkpoint: Keep KZ400A on the fitment check even when the touring equipment is missing.
1978 appears in both product ranges
A compared with B
The later B has a six-speed specification and a separate featured engine gasket set.
Parts checkpoint: Use the A 1977–1978 set for its listed application; compare the B guide only if you are identifying a different engine.
Explore KZ400B partsModel codes and serial markingsKawasaki KZ400A identification
Record the complete frame stamping at the steering head and the engine number on the crankcase. An engine replacement can leave a motorcycle with frame and engine identities from different versions.
How to read this chart: These are starting entries transcribed from model specification sheets. They are not complete production ranges or a VIN decoder, and they do not establish part interchange. The trailing continuation mark is omitted.
KZ400A reference entriesConfirmed values only
| Model / reference entry | Starting frame number | Starting engine number |
|---|---|---|
| KZ400-A1/A2 · combined entry, 1977 onward | KZ400A-500001 | K4E090950 |
The available sheet groups A1 and A2 together. These starts are not separate 1977 and 1978 ranges and cannot distinguish A1 from A2 by themselves.
For a changed carburetor, front brake, fork or airbox, identify the fitted component as well as the bike. Photograph its markings and compare the product’s exact application before ordering.