Target Audience:
Mechanics and DIY enthusiasts seeking comprehensive repair and maintenance guidance for the Suzuki GN250.
Value Proposition:
Provides detailed, easy-to-understand, and illustrated procedures to ensure satisfactory after-sales service and vehicle upkeep, making repairs efficient and cost-effective.
Key Features:
Over 220 pages of detailed information, instant PDF download, printable pages, clear explanations, photographic and diagrammatic guidance, troubleshooting sections, special tool references.
Engine Systems:
Engine overhaul, top-end, bottom-end, cooling system, lubrication system, fuel system (carburetor, fuel lines), ignition system, exhaust system, engine tuning and adjustments.
Transmission Drivetrain:
Clutch operation and adjustment, gearbox disassembly and assembly, chain drive maintenance, lubrication.
Chassis Suspension:
Front fork (telescopic) overhaul and adjustments, rear shock absorber system, swingarm, frame maintenance.
Brakes:
Front and rear brake system maintenance, hydraulic system checks, pad replacement, caliper service, drum brake adjustments.
Electrical System:
Wiring diagrams, lighting system, charging system (stator, regulator/rectifier), ignition coil, starter motor, battery maintenance, troubleshooting of electrical faults.
Bodywork Controls:
Handlebar and controls, seat removal, fuel tank removal and installation, fenders, side covers, instrument cluster.
Maintenance:
Routine maintenance, oil changes, filter replacements, spark plug service, chain lubrication and adjustment, brake adjustments, tire pressure checks.
Troubleshooting:
Diagnostic procedures for common problems, electrical troubleshooting charts, engine performance issues, starting difficulties.
Repair Rebuild:
Comprehensive step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly for all major vehicle systems.
Adjustments:
Carburetor adjustment, ignition timing adjustments, valve clearance adjustments, clutch cable adjustments, brake lever adjustments.
Installation Removal:
Detailed instructions for removing and installing all major components and sub-assemblies.
Depth:
Highly detailed, comprehensive step-by-step procedures, explanations, and pictorial diagrams from bumper to bumper. Covers basic maintenance to complete rebuilds and advanced diagnostics.
Engine Type:
Air-cooled, four-stroke, SOHC
Displacement:
249 cc (15.2 cu in)
Bore X Stroke:
66.0 mm x 72.0 mm (2.60 in x 2.83 in)
Horsepower:
~20 HP @ 7,500 rpm (Estimate, exact figures may vary by market)
Torque:
~18 Nm (Estimate, exact figures may vary by market)
Carburetor:
Mikuni VM32SS (or similar single carburetor) - specific details on adjustment and troubleshooting are covered in the manual.
Fuel Tank Capacity:
13.0 L (3.4 US gal) - Specification, not explicitly in manual description but a common data point.
Length:
2,050 mm (80.7 in) - Approximate, may vary slightly by region.
Width:
770 mm (30.3 in) - Approximate.
Height:
1,090 mm (42.9 in) - Approximate.
Dry Weight:
133 kg (293 lbs) - Approximate.
Safety Focus:
Manual emphasizes adherence to safety procedures, proper tool usage, and the importance of rectified problems for safe operation. Includes DANGER, CAUTION, and NOTE remarks.
Active Safety Systems:
Front disc brake, rear drum brake. Manual provides maintenance and adjustment procedures for optimal performance.
Structural Integrity:
Frame integrity checks and maintenance procedures are included.
Infotainment Systems:
N/A - This model predates modern infotainment systems. Focus is on core mechanical and electrical operation.
Driver Assistance Features:
N/A - No electronic driver assistance features.
Connectivity Features:
N/A - No electronic connectivity features.
Oil Change Interval:
The manual details procedures and specifications for oil changes, with typical intervals for this era being around 3,000-5,000 km or 6-12 months, as outlined in the periodic maintenance chart.
Engine Oil:
The manual specifies approved lubricants and viscosities, typically recommending a 10W-40 or 20W-50 API SE/SF or equivalent motorcycle-specific oil.
Brake Fluid:
DOT 3 or DOT 4 brake fluid for hydraulic systems.
Common Wear Items:
Carburetor wear (jetting, float bowl), clutch wear, fork seal leaks, chain and sprockets, and electrical connections are commonly addressed in service manuals of this vintage.
Preventative Maintenance:
The manual stresses following the periodic maintenance chart, investigating unusual noises, and rectifying problems promptly to maximize vehicle life.
Manufacturer Heritage:
Suzuki Motor Corporation, established in 1909, has a long history in motorcycle manufacturing, known for reliable and accessible machines.
Gn250 Evolution:
The GN250 was part of Suzuki's cruiser-style motorcycle lineup, popular for its user-friendly nature and classic styling. Introduced in the early 1980s, it offered a balance of performance and comfort for its class.
Production Period:
Produced from the early 1980s into the early 2000s, with these specific years covering the initial introduction of the model.
