Kawasaki KH250 / KH400 / S1 / S2 / S3 Shop Manual 1972–1976

This Kawasaki KH(S) Series shop manual covers S1/S2 (1972), S1A/S2A (1973), S1B/S3 (1974), S1C/S3A (1975), and KH250-A5, European KH250-B1 and KH400-A3 (1976).

Printable PDF with Chapter Bookmarks

Text search and diagram detail: PDF text search is not available. Embedded bookmarks provide access to the main chapters and many individual procedures. Small labels in the electrical circuit diagrams require zooming.

The ZIP download contains one printable English PDF with 129 pages, including five opening pages covering the front cover, model photographs, foreword, model application chart and contents. The five-page maintenance guide, torque-table and index section is also included in that total.

Engine, Superlube and Chassis Repair

These selected content highlights summarize the main repair and diagnostic areas rather than reproduce the full contents. Further topics include fuel-tap service and exhaust-system decarbonizing.

• Engine and transmission: Step-by-step engine removal and mounting, top-end inspection, boring and honing checks, piston/ring service, crankcase separation, clutch, primary-gear, transmission and kick-starter repair.

• Carburetion: Mikuni VM22SC, VM24SC and VM26SC coverage, three-carburetor idle setup, starter-cable synchronization, and fuel-level and mixture diagnosis.

• Superlube lubrication: Oil-pump adjustment, bleeding and output testing, with oil-passage diagrams and check-valve operation.

• Brake service: Two-leading-shoe front brake adjustment, drum-brake inspection, master-cylinder and caliper service, hydraulic bleeding, and brake-lining wear-indicator checks.

• Chassis and suspension: Wheel and hub repair, swing-arm inspection, steering-stem service, drive-chain adjustment, and separate front-fork procedures for drum- and disc-brake models.

• Electrical diagnosis: S Series/KH250 contact-breaker and KH400-A3 C.D. ignition coverage, including generator, rectifier, regulator, ignition-timing, ignition-coil, signal-coil, exciter-coil and C.D.I.-unit tests.

• Illustrated references: Transmission layouts, oil-flow charts, carburetor system views, disc-brake hydraulic sections, fork cutaways and KH400 C.D.I. circuits.

It is suited to experienced owners and motorcycle technicians with precision measuring tools, electrical test equipment, and engine teardown and hydraulic brake experience; several procedures require Kawasaki special tools.

Model Changes and Internal Engine Work

This Kawasaki shop manual moves from maintenance and adjustment into internal engine, brake, suspension, and electrical repair. Its model-specific construction notes help distinguish the applicable components and procedures before teardown.

The application chart identifies the S1B brake-lining wear indicator, S2A and KH250-B1 disc-brake applications, the S3A spark-plug change, and KH400-A3 changes to ignition, clutch release, air cleaner and muffler components.

Crankshaft limits: Inspection covers connecting-rod alignment, big-end clearances, crankshaft runout, bearings and oil seals. The manual recommends replacement of an out-of-tolerance crankshaft assembly; it does not provide a complete press-apart crankshaft rebuilding procedure.

Clutch differences: The S Series/KH250 nylon release gears and KH400 steel worm-and-ball release mechanism are treated separately. Transmission inspection connects selector-fork and gear-groove wear with poor engagement and jumping out of gear.

Carburetor and Superlube Diagnosis

The carburetor troubleshooting section relates rich or lean running to throttle opening, helping narrow inspection to the pilot system, jet needle, needle jet, main jet or float mechanism. Carburetor identification marks and model-specific settings accompany the component descriptions.

The lubrication chapter explains pump operation and measured output checks. It warns that compressed-air cleaning can distort a Superlube check-valve spring, disrupting oil delivery and risking engine damage.

Brake, Hub and Suspension Differences

Brake coverage distinguishes the earlier split caliper from the one-piece KH Series caliper. Hydraulic component inspection includes cylinder and piston wear, seals, disc thickness and disc runout.

The disc-brake front-hub instructions identify an assembly trap: holding the axle instead of the gearbox can damage the speedometer gear drive. Brake work also requires careful control of fluid contamination and the precautions provided in the brake chapter.

Front-fork sections distinguish the relevant constructions and service tools. Rear shock absorbers are covered for removal, inspection and spring adjustment, but defective units are replaced as assemblies rather than internally rebuilt.

Electrical Testing and Troubleshooting Charts

The electrical chapters separate contact-breaker equipment from the KH400 charging and C.D.I. systems. KH400 C.D.I.-unit testing calls for the Kawasaki Electro Tester 57001-980 and a suitable adapter; the sealed unit is replaced if defective.

The separate whole-motorcycle wiring-diagram section listed in the contents is not included in this PDF. Component circuit diagrams remain available within the electrical chapters.

Troubleshooting charts address starting failure, misfiring, low power, overheating, abnormal noise, shifting faults and chassis problems. A periodic maintenance guide and fastener torque tables support routine service planning and reassembly.

Examples from the Clutch Inspection Tables

For S1/KH250 clutch springs, standard free length is 34.5 mm, with a 32.5 mm service limit. The S2/S3/KH400 spring specification is 28.7 mm standard, with a 26.7 mm service limit.

The friction-plate inspection table lists 3.0 mm standard thickness and a 2.7 mm service limit. These specifications accompany checks for spring weakness, plate wear and clutch disengagement problems.