1982-1983 Suzuki GN250 Service Manual (P/N 99011-37530)

• Official Suzuki Motor Co., Ltd. publication P/N 99011-37530. This 100-page OEM workshop reference covers the 1982–1983 GN250 series.
• Details essential maintenance and specifications for the air-cooled, four-stroke 250 cc single-cylinder engine.
• Provides an authoritative breakdown of the TSCC (Twin Swirl Combustion Chamber) engine design and the unique electrical ignition system specific to these models.
• Features 175 technical illustrations, 12 detailed engine exploded-view diagrams, and 14 comprehensive torque-specification tables for chassis components.

Engine and Chassis Maintenance Details

The 1982–1983 Suzuki GN250 service manual comprehensively outlines factory-approved tune-up procedures. Technicians will find exact specifications for battery electrolyte levels, valve clearances, and spark plug heat ranges. It also details crucial fuel system maintenance intervals, clutch cable play adjustments, and drive chain lubrication requirements. Beyond the engine, the text documents routine chassis checks. This includes tire tread depth inspection, spoke tightness, systematic steering bearing adjustment, and front fork oil levels. Keep in mind that working on motorcycle chassis and engine components involves inherent risks; always ensure you have the proper tools and training, or consult a certified mechanic before undertaking complex repairs.

Technical Data and Specifications

This manual provides the precise technical data necessary for engine overhauls and component verification. It lists compression pressure standards, valve seat servicing metrics with 15° and 45° cutters, and crankshaft runout limits. You will find specific parameters like the 1250 ± 50 r/min idle speed, required oil capacities for filter changes, and magneto pick-up coil signal waveforms for the electronic advance ignition system. Torque values are strictly defined. For example, cylinder head bolt torques are documented in a multi-stage sequence, culminating in a final specification of 35–40 N-m. Overall, the documentation details the complete factory structure to aid in professional-level maintenance of the TSCC-series build.