Yamaha XJ700N/NC, XJ700S/SC & XJ750XN 1985–1986 Service Manual Set (P/N LIT-11616-04-85)

The S/SC supplement must be used with the included N/NC base manual for full service procedures. The XJ750XN manual treats the liquid-cooled configuration separately.

XJ700XN/XNC coverage is limited to four inserted specification sheets in the XJ750XN file.

PDF Bookmarks, Text Search, and Diagram Detail

Navigation and small labels: All three PDFs have embedded bookmarks. The manual text is not searchable; only added notes on two XJ750XN pages have searchable text. Small wiring labels require zooming, especially in the softer S/SC signal diagram.

The ZIP contains three printable English PDFs totaling 503 pages. These counts already include the N/NC cover, five S/SC preliminary pages, and the XJ750XN file’s two introductory pages, one inserted ignition-timing reference page, and four additional specification sheets.

Engine Overhaul, Shaft Drive, and Electrical Diagnosis

The following selected contents outline the repair coverage. Other included topics include headlight adjustment and throttle-cable maintenance.

• Engine repair: Engine removal, complete disassembly, lubrication-system inspection, clutch and transmission service, reassembly, and final adjustment.

• Shaft drive: Middle-gear and final-gear disassembly, bearing service, gear-lash measurement, ring-gear positioning, and shim selection.

• Carburetors: Carburetor-bank removal and overhaul, float and fuel-level adjustment, vacuum synchronization, and intake/crankcase-ventilation routing.

• Liquid cooling: XJ750XN radiator, thermostat and water-pump service, coolant filling, pressure testing, and electric-fan diagnosis.

• Brakes and chassis: Wheel and bearing service, dual front-disc calipers, master cylinder, brake bleeding, rear drum brake, front forks, steering head, swingarm, and rear shocks.

• Electrical troubleshooting: Complete XJ700N/NC and XJ750XN wiring diagrams, with starting, charging, ignition, lighting, signal, fuel-warning, and XJ750XN cooling-system diagnostic charts.

Yamaha identifies dealers and qualified mechanics as the primary users and assumes a working knowledge of motorcycle repair.

Air-Cooled and Liquid-Cooled Service Differences

The distinction matters before parts or repair data are selected. XJ700N/NC and XJ700S/SC use the 696 cc air-cooled DOHC four with Hitachi HSC33 carburetors. The XJ750XN uses the 749 cc liquid-cooled DOHC four, its five-valve cylinder head, Mikuni BS33 carburetors, and dedicated cooling system.

The California NC/SC material includes emission-control maintenance and separate carburetor identification data. The S/SC supplement supplies revised service schedules, ignition-timing checks, fuel-warning diagnosis, and engine, chassis, electrical, torque, and capacity data.

Cylinder-Head and Internal Engine Work

Step-by-step instructions cover valve-guide replacement, valve-seat cutting and lapping, camshaft and cam-chain timing, valve-clearance setup, and piston/cylinder inspection. Crankshaft and connecting-rod bearing selection uses stamped size references and color codes.

Valve-adjustment procedures differ between configurations: the N/NC instructions use a tappet-adjusting tool, while the XJ750XN procedure includes camshaft and lifter removal to reach the adjusting pads.

Diagnostic Circuits and Workshop References

Starter-circuit charts separate relay, switch, wiring, and motor checks. XJ750XN cooling-system charts distinguish temperature-gauge faults from fan-motor and thermo-switch faults, supporting diagnosis before components are replaced.

Component-specific torque tables, inspection limits, running clearances, fluid capacities, and electrical test specifications accompany the procedures. Carburetor section views, coolant-flow and lubrication diagrams, and cable-routing views support inspection and reassembly.

Factory Tools and Final-Drive Cautions

The N/NC tool pages identify the YICS shutoff tool YM-08025, vacuum gauge YU-08030, and tappet-adjusting tool YM-01245. They also list universal clutch holder YM-91042, middle-drive pinion holder YM-33222, and final-drive gear-lash measurement tool YM-01230.

Dimensioned drawings for two press tools and a gear-case holding tool support fabrication of the fixtures used for final-drive disassembly and assembly. Shaft-drive exploded views identify the universal joint, while the service text covers drive-shaft spline inspection and installation.

The final-drive chapter flags a left-hand-thread bearing retainer; treating it like a conventional thread risks damaging the retainer or housing. It also prohibits reusing bearings or races after final-drive-shaft removal.

Brake bleeding, compressed-spring work, electrical testing, and running-engine carburetor synchronization require suitable shop equipment and the safety precautions stated in the manuals.

Selected Thermostat and Radiator-Cap Test Data

For XJ750XN thermostat inspection, the manual specifies an opening temperature of 82°C (180°F), with full opening at 95°C (203°F) and valve lift of at least 8 mm (0.31 in).

The radiator-cap inspection specifies a valve-opening pressure of 78–98 kPa (11.4–14.2 psi). This is the cap’s opening-pressure specification, distinct from the separate cooling-system leak test.