2000 Hyosung Aquila 250 Service Manual (P/N 99000-95310)

• Covers 2000 Hyosung Aquila 250 motorcycles, detailing the complete maintenance and mechanical service parameters for the 249cc DOHC air/oil-cooled V-twin engine platform.
• Official Hyosung Motors & Machinery Inc. publication P/N 99000-95310.
• Contains 205 pages of technical content including exploded-view component illustrations, torque tables for frame and engine fasteners, and detailed valve clearance specifications.
• Outlines complete removal and teardown sequences for the steering stem, telescopic front forks, rear suspension, oil pump, starter motor, gearshift shaft, magneto rotor, and primary driven gear.
• Features critical diagnostic visuals including wiring diagrams, valve timing diagrams, tappet shim selection charts, periodic maintenance charts, component parts drawings, and exterior illustrations.

Technical Scope and Workshop Benefits

This 2000 edition serves as the base factory reference for the initial Aquila 250 launch year. It provides comprehensive technical guidance to keep this V-twin platform running optimally. Delivered as a secure PDF, having these exact factory tolerances and tappet shim selection charts directly at your workbench provides a massive diagnostic advantage, effectively preventing catastrophic valve-to-piston contact during complex top-end work. Instead of outsourcing expensive labor, mechanics can follow step-by-step instructions for high-priced shop tasks like purging air from the hydraulic brake circuit, overhauling the telescopic front forks, and calculating piston-to-cylinder clearances.

The documentation spans seven distinct groups. It starts with general motorcycle identification, serial number locations, and essential fluid recommendations. From there, it dives deep. Subsequent sections define the exact periodic maintenance schedule. You get interval-based inspection guidelines for the valve train, carburetor, clutch, and drive chain systems. Need to rebuild the top end? Engine sections detail the complete teardown and assembly of the cylinder head, pistons, magneto, and transmission components. The fuel system chapter also provides precise baseline specifications for tuning the Mikuni BDS 26 double carburetor. Utilizing this baseline data guarantees a reliable repair that meets strict manufacturer standards.

Mechanical Specifications and Safety Parameters

Accurate data is the difference between a reliable rebuild and a blown engine. Engine health is monitored through compression pressure, firmly listed at 14–16 kg/cm² for the standard range. Intake valve clearance must be set to 0.1–0.2 mm, while exhaust valves require 0.2–0.3 mm. Cooling and lubrication integrity relies on a 14.0-liter fuel capacity and a strict 1,450 ml engine oil change requirement.

Safety in the shop requires strict adherence to factory torque values. Securing the rear axle nut demands 90–140 Nm to prevent wheel lockup or detachment during operation. Brake system performance is maintained using DOT3 or DOT4 fluid, with the front brake caliper air bleeder valve carefully tightened to 6–9 Nm to prevent fluid leaks. This 205-page official workshop publication delivers the exact engine, chassis, electrical, and fuel-system specifications required to complete a professional repair on this 250 cc cruiser safely and efficiently.