Kawasaki ZXR 250 (ZX250-C6) – 1997 Service Manual

Kawasaki Heavy Industries’ service manual covers the ZXR 250, model code ZX250-C6, with maintenance, troubleshooting and internal repair procedures. This is the First Edition, February 28, 1997.

PDF Bookmarks and Wiring Diagram Detail

Search, navigation and diagram labels: PDF text search is not available. Eleven embedded bookmarks lead to chapters or chapter groups. Small wiring labels require zooming; some labels at the edges of the two-page main wiring diagram are cropped.

The download contains one printable, 254-page PDF, including five front-matter pages and the 10-page Appendix.

Engine Overhaul, Carburetor Setup and Electrical Diagnosis

The following selected repair topics outline the manual’s coverage rather than reproduce its full contents. Additional subjects include fairing removal and vacuum-valve inspection.

• Engine top end: Engine removal and installation, camshaft timing, compression testing, shim-under-bucket valve adjustment, cylinder-head service, and piston and ring inspection.

• Crankshaft and transmission: Crankcase separation, crankshaft and connecting-rod inspection, bearing-insert selection, transmission-shaft assembly, and shift-drum and fork installation.

• Clutch and lubrication: Clutch removal, plate and spring inspection, release-mechanism service, oil-pump removal, relief-valve inspection, and oil-pressure measurement.

• Fuel system: Keihin CVK-D30 carburetor disassembly, cleaning and synchronization, service fuel-level adjustment, float-height checks, and throttle and choke cable adjustment.

• Cooling system: Cooling-system pressure testing, water-pump inspection, radiator removal, thermostat testing, coolant replacement, and air bleeding.

• Chassis and brakes: Front-fork disassembly, steering-bearing replacement, swingarm and linkage service, brake caliper and master-cylinder overhaul, and brake-line bleeding.

• Electrical diagnosis: Battery checks, alternator and regulator/rectifier tests, ignition-system diagnosis, starter-motor service, relay checks, and wiring diagrams.

Written primarily for trained mechanics in a properly equipped shop, the manual also supports owners performing basic maintenance and repair who understand mechanical principles, tool use and workshop procedures.

Valve Timing and Internal Engine Repair

Step-by-step procedures cover camshaft removal and installation, valve-guide replacement, valve-seat repair, and cylinder and piston work. The Valve Clearance Adjustment Charts connect measured clearance with replacement shim size, giving the technician the reference needed to select shims during valve service.

The manual warns that turning the crankshaft with the camshaft-chain tensioner removed can disturb valve timing and damage the valves. It also explains how excessive valve-seat grinding can sink a valve too deeply into the head, making clearance adjustment impossible and requiring cylinder-head replacement.

Crankshaft and transmission: Bearing-selection tables identify connecting-rod and main-bearing inserts by component markings and color codes. Transmission assembly drawings show shaft components and the positive neutral finder mechanism, alongside shift-fork and drum installation details.

Carburetor Setup and Cooling-System Tests

Carburetor instructions distinguish synchronization checks from service fuel-level and float-height adjustments. They identify the gauges and adjusters required for these tasks and describe inspection of diaphragms, float valves and pilot screws.

The Coolant Flow Chart explains circulation through the engine, thermostat and reserve tank. Cooling-system tests include radiator-cap pressure checks and thermostat inspection, while water-pump inspection addresses leakage through the drainage passage.

Lubrication and Electrical Fault Finding

The Engine Oil Flow Chart traces lubrication through the engine and transmission. Oil-pressure diagnosis links abnormal readings to checks of the pump, relief valve, oil passages and crankshaft bearings.

Electrical coverage includes an IC Igniter Troubleshooting flowchart and separate charging, ignition and electric-starter circuit diagrams. Regulator/rectifier tests, coil-resistance checks and junction-box inspections provide ways to investigate starting and charging faults before selecting replacement components.

Suspension, Brakes and Final Drive

Front-fork procedures cover oil changes, seal and guide-bushing replacement, damping adjustment and spring inspection. The fork piston-cylinder unit is not to be disassembled. Rear-suspension coverage includes shock removal, spring-preload adjustment, swingarm bearings and Uni-Trak linkage service.

The Wheels/Tires and Final Drive chapters cover wheel and axle inspection, balancing, hub bearings, chain wear and sprocket service. Cable, Wire, and Hose Routing views support reassembly, while the Periodic Maintenance Chart organizes scheduled checks.

Please note that all maintenance should be performed by qualified personnel using appropriate safety gear and specialized tools.

Sample Valve, Fluid and Fastener Specifications

Intake valve clearance is specified at 0.15–0.24 mm with the engine cold, at room temperature; the accompanying charts cover shim selection.

Fluid references distinguish a completely dry engine oil fill of 2.6 L from routine oil changes. Cooling capacity is 1.2 L, including the radiator, engine and reserve tank at its full mark.

The cylinder-head section specifies 18 N-m for the 7 mm head bolts with oiled threads and seating surfaces, using the illustrated tightening sequence. The clutch hub nut specification is 130 N-m with a new nut.