Target Audience:
Owners of Kymco Mongoose 90 ATVs seeking to perform maintenance, repairs, or modifications.
Value Proposition:
Provides official factory procedures and specifications, ensuring accurate and reliable repairs, often surpassing generic aftermarket manuals.
Convenience:
Digital format allows for easy access on various devices and on-the-go reference.
Accuracy:
Directly from Kymco factory data, ensuring authenticity.
Engine Overhaul:
Complete disassembly, inspection, repair, and assembly of the engine.
Fuel System:
Carburetor service, fuel pump, fuel lines, and fuel tank maintenance.
Cooling System:
Radiator, coolant, water pump, and thermostat service.
Ignition System:
Spark plugs, ignition coil, CDI unit, and wiring diagnostics.
Transmission And Drivetrain:
CVT system service, clutch, and final drive maintenance.
Brakes:
Brake caliper service, master cylinder, brake lines, and bleeding procedures.
Suspension:
Front and rear shock absorber replacement, linkage service, and adjustment procedures.
Steering:
Handlebar assembly, steering column, and tie rod end service.
Electrical System:
Wiring diagrams, battery maintenance, lighting, starter motor, and charging system.
Frame And Bodywork:
Chassis inspection, panel removal/installation, and seat service.
Wheels And Tires:
Tire pressure, wear inspection, and wheel bearing service.
Preventative Maintenance:
Regularly scheduled maintenance tasks and checks.
Troubleshooting:
Diagnostic procedures for common and uncommon issues.
Repair Procedures:
Step-by-step instructions for component repair and replacement.
Disassembly Assembly:
Detailed instructions for taking apart and putting back together vehicle components.
Adjustment Procedures:
Calibration and setting of various systems like brakes and engine idle.
Depth:
Comprehensive, suitable for both professional mechanics and experienced DIY enthusiasts.
Engine Type:
4-Stroke, Single-Cylinder, Air-Cooled
Bore X Stroke:
47 mm x 51.8 mm (typical specification, refer to manual for precise data)
Compression Ratio:
10.0:1 (typical specification)
Horsepower:
Approx. 6.8 HP @ 7,500 RPM (typical for this class, manual will confirm)
Torque:
Approx. 7.0 Nm @ 6,000 RPM (typical for this class, manual will confirm)
Carburetor Model:
Mikuni VM20-231 or similar (refer to manual for exact specification)
Fuel Type:
Unleaded Gasoline (Octane Rating: 87 or higher)
Oil Type:
SAE 10W-40 API SG or higher (refer to manual for precise specification and capacity)
Length:
Approx. 1520 mm (60 in) (refer to manual for exact specification)
Width:
Approx. 960 mm (38 in) (refer to manual for exact specification)
Height:
Approx. 975 mm (38 in) (refer to manual for exact specification)
Dry Weight:
Approx. 110 kg (242.5 lbs) (refer to manual for exact specification)
Gross Vehicle Weight Rating Gvwr:
Refer to manual for specific GVWR, typically around 200 kg (440 lbs) for the operator and payload.
Rack Capacity Front:
Refer to manual for specification, typically around 10-15 kg (22-33 lbs)
Rack Capacity Rear:
Refer to manual for specification, typically around 20-25 kg (44-55 lbs)
Crash Safety Standards:
Not applicable for ATVs in the same way as passenger vehicles. Focus is on structural integrity and component safety.
Braking System:
Hydraulic Disc Brakes (Front and Rear)
Lighting:
Headlights, Taillight, Brake Light
Throttle Limiter:
Often incorporated for younger riders, adjustable via screw in throttle cable housing.
Display Features:
Basic instrumentation typically includes speedometer, odometer, and indicator lights (e.g., neutral, high beam).
Safety Features:
Throttle limiter (often adjustable) for beginner riders.
Charging Ports:
Not typically equipped with USB or 12V ports as standard, though aftermarket options exist.
Oil Change Interval:
Every 1,000 km or 6 months (refer to manual for specific details and operating conditions).
Air Filter Cleaning:
Every 500 km or as needed based on riding conditions.
Spark Plug Replacement:
Every 2,000 km or 1 year (refer to manual for specific plug type and gap).
Valve Clearance Check:
Every 4,000 km or 2 years (critical for engine performance).
Engine Oil Specification:
SAE 10W-40 API SG or higher.
Brake Fluid Type:
DOT 3 or DOT 4 Hydraulic Brake Fluid (refer to manual for exact specification).
Carburetor Tuning:
Can require periodic adjustment, especially with changes in altitude or fuel quality. Manual provides detailed tuning guides.
Chain Tension:
Regular checks and adjustment are essential to prevent premature wear of the chain and sprockets.
Battery Maintenance:
As with any powersports vehicle, ensuring proper battery charging and terminal condition is key for starting reliability.
Kymco Legacy:
Kymco (Kwang Yang Motor Co., Ltd.) is a Taiwanese company founded in 1964, known for its production of scooters, motorcycles, and ATVs. It is a major global manufacturer with a reputation for reliable and affordable vehicles.
Mongoose Lineage:
The Mongoose line of ATVs has been a popular entry-level and youth-oriented option for Kymco, evolving with features and engine sizes to meet market demands.
Manufacturing Origin:
Taiwan
