Suzuki LT125 Series 1983-1987 Service Manual
Troubleshooting and repair reference for the LT125, LT125E, LT125F, LT125G, LT125H models. Covers engine, chassis, electrical, and fuel systems
Suzuki Models Covered & Key Technical Specifications
Models: Suzuki LT125
Sub-models / Variants: LT125E, LT125F, LT125G, LT125H
Model Years: 1983–1987
Technical Data:
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Engine displacement: 124 cm³
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Engine configuration: Air-cooled, 4-stroke, single-cylinder, OHC
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Bore and stroke: 57.0 mm x 48.8 mm
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Compression ratio: 8.5:1
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Carburetor: Mikuni VM20SS
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Transmission: 5-forward constant mesh, 1-reverse
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Dry mass: 129 kg (284 lbs)
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Fuel tank capacity: 5.0 liters (1.3 US gal)
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Engine oil capacity: 1100 ml (1.16 US qt)
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Tire pressure (front/rear): 15 kPa (2.2 psi)
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Valve clearance (IN and EX): 0.08–0.13 mm (0.003–0.005 in)
Suzuki Manual Features & Content Preview
1983–1987 Suzuki LT125 ATV Service Manual
- Covers all 1983–1987 Suzuki LT125 variants, including the LT125E, LT125F, LT125G, and LT125H
- Original OEM publication (P/N 99500-41013-03E) for the 124cc air-cooled 4-stroke engine
- Instant PDF download delivered the moment your payment clears
- Fully searchable OCR text—find specific torque specs or wear limits in seconds
- Formatted for standard US Letter and A4 printing
Built for the Workshop
Mechanics and DIY rebuilders need reliable, factory-correct data to keep vintage ATVs on the trail. This publication delivers 262 pages of raw technical reference, eliminating the guesswork from your maintenance routine. It details the precise internal engine specifications for the unique Twin Dome Combustion Chamber, including valve timing, camshaft runout, and piston-to-cylinder clearances. Having a searchable digital file means you get immediate access to critical specs without flipping through greasy paper pages.
System Overviews and Component Diagrams
The manual is organized into 12 major chapters covering general information, periodic maintenance, and chassis adjustments. It provides deep technical overviews of the fuel system, lubrication routing, and electrical troubleshooting for the Suzuki PEI ignition. Highly detailed exploded diagrams allow for precise component identification during disassembly, particularly for complex assemblies like the recoil starter, centrifugal clutch, and transmission gear shifting forks. To ensure safe operation and prevent mechanical failure, always cross-reference these factory tolerances and consult a certified technician before riding.
Verified Factory Specifications
Forget hunting forums for unverified numbers. This guide documents the exact torque requirements, fluid capacities, and wear tolerances direct from Suzuki. Highlighted data includes:
- Cylinder head bolt torque: 15–20 Nm (11.0–14.5 lb-ft) for 8 mm bolts
- Engine oil capacity: 1.1 liters for routine changes
- Valve clearance: 0.08–0.13 mm (intake and exhaust)
- Crankshaft runout service limit: 0.05 mm
Document Reference: 99500-41013-03E
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