1985–1990 Suzuki LT230, LT230GE, LT-F230G, LT230S, and LT250S ATV Service Manual (P/N SUZ-8590-ATV)

• Covers 1985–1990 Suzuki LT230, LT230GE, LT-F230G, LT230S, and LT250S
• Official service publication PN SUZ-8590-ATV, packed with factory-authorized specifications
• Includes 160 detailed figures, 7 reference tables for torque and fluid capacities, and integrated wiring diagrams
• Consolidates base service information with dedicated supplements for later model year updates into a single volume
• Features step-by-step repair guidelines, factory tune-up procedures, and complete engine rebuilds in a PDF format
• Examines critical components like the dual-range subtransmission, capacitor discharge ignition, centrifugal clutch, recoil starter, carburetor, and swing arm

Procedural & Diagnostic Contents

The manual outlines the exact specifications required for complete disassembly, inspection, and assembly of the engine and drivetrain. It details the tolerances for critical internal engine components, including the cylinder head, camshaft, piston, and oil pump. It also covers the clutch and transmission systems, fuel and exhaust calibration, and specialized steering and suspension adjustments.

Instead of paying high dealership labor rates, mechanics and advanced DIYers can confidently tackle tasks that typically demand an expensive workshop visit, such as splitting the crankcase, overhauling the carburetor, and bleeding the hydraulic brakes. Having these exact factory clearances directly on the workbench streamlines the daily maintenance routine and allows for precise component reassembly.

The troubleshooting section helps isolate faults across the electrical, mechanical, and fuel-delivery systems. Beyond the integrated wiring diagrams, the text features exploded component views, maintenance schedule charts, diagnostic fault tables, component illustrations, and cable routing schematics. When servicing the rear axle on these specific Suzuki models, a common pitfall is applying heat to loosen the stubbornly tight locknut and inner nut. Doing so will permanently destroy the heat-treated hardness of the axle and lead to catastrophic component failure. Remember: Always prioritize shop safety and verify your tools and mechanical background before starting complex teardowns.

Specifications & Reference Data

Fastener torque values are clearly defined, such as cylinder head nuts at 9–11 Nm. Fluid capacities are mapped out precisely, listing the LT-F230G subtransmission oil capacity at 240–270 cc. For the ignition system, spark plug gaps are specified at 0.6–0.7 mm. You'll also find quick-reference charts for tire inflation pressure, lubricant capacities across different drivetrain variants, and target values for electrical system diagnostics.