1985-1988 Honda NS400R Shop Manual (P/N 07946-KM40000)

• Built for owners and workshops servicing the 1985–1988 Honda NS400R, covering the liquid-cooled V3 2-stroke engine and 6-speed transmission
• Official Honda OEM publication P/N 07946-KM40000 (1985 edition) for international market specifications
• Contains 19 exploded-view diagrams, 96 technical images, and detailed torque tables
• Serves as the authoritative baseline for maintenance, fuel system calibration, and mechanical assembly

Engine and Fuel System Documentation

This OEM publication details the technical baseline for maintaining the V3 engine. You will find exact cylinder compression thresholds, cooling system capacities, and factory procedures for critical tasks like oil pump synchronization and line bleeding. Coverage of the Keihin TA09 carburetors details float level adjustments, jet needle positioning, and power jet configurations. Proper maintenance of high-performance 2-stroke components demands strict adherence to factory safety protocols and specialized tooling, which are fully documented here. The chapters also break down drive chain tensioning, brake system upkeep, and precise fluid specifications for both the transmission and coolant reservoirs.

Precision Data and Torque Specifications

Having accurate specifications is non-negotiable when assembling the major components of this liquid-cooled triple. The text lists exact figures, such as the cylinder head nut torque rating of 23–27 Nm (17–20 ft-lb) across all cylinders. It confirms the transmission oil capacity at 1.8 liters following a routine drain and notes a 19-liter fuel tank capacity for standard operation. Beyond fluid levels, the publication maps out the exact sequence for engine removal and installation. Mechanics can rely on the extensive torque value charts and complete electrical routing diagrams to verify every connection and fastener during a rebuild.