Market Position:
Entry-level youth ATV, designed for recreational riding and light trail use.
Competitive Analysis:
Competes with similar displacement ATVs from manufacturers like Arctic Cat, Polaris, and Suzuki, offering a balance of performance and affordability.
Key Features:
Compact size, user-friendly operation, reliable engine, suitable for younger riders developing ATV skills.
Systems Covered:
Frame covers, Exhaust muffler, Lubrication system, Fuel system, Engine, Cylinder head & valves, Cylinder & piston, Drive & driven pulleys, Kick starter, Final reduction, Crankcase & crankshaft, Front wheel, Front brake, Front suspension, Rear wheel, Rear brake, Rear suspension, Battery charging system, A.C. Generator, Ignition system, Starting system, Lights, Instruments & switches, Evaporative Emission Control System, Exhaust Emission Control System
Procedures Included:
Inspection, Adjustment, Lubrication, Engine removal & installation, Cylinder head overhaul, Valve adjustment, Piston replacement, Pulley service, Kick starter repair, Final drive maintenance, Crankshaft service, Wheel bearing replacement, Brake system servicing, Suspension tuning, Electrical system diagnostics, Ignition system troubleshooting, Starting system repair, Lighting system checks, Emission control system maintenance
Technical Depth:
Detailed diagnostic procedures, torque specifications, component tolerances, and step-by-step repair instructions for both routine maintenance and major overhauls.
Engine Type:
4-stroke, SOHC
Bore X Stroke:
Approximately 47mm x 51.4mm (typical for this displacement range)
Cooling System:
Air-cooled
Horsepower:
Typically around 6-8 HP (estimated, specific rating not provided)
Torque:
Low to mid-range torque optimized for off-idle response (estimated)
Carburetor Type:
CV carburetor (e.g., Mikuni VM series or similar)
Fuel Type:
Unleaded Gasoline
Engine Removal Installation
Engine Removal Installation Procedure:
Detailed steps for engine removal and installation, including draining fluids, disconnecting components, and mounting procedures.
Oil Type:
SAE 10W-40 API SG or higher (typical for air-cooled engines)
Oil Capacity:
Approximately 0.8-1.0 liters (typical for this engine size, specific value in manual)
Transmission Type:
CVT (Continuously Variable Transmission)
Drive Pulley Inspection:
Inspection and maintenance of the drive pulley, clutch shoes, and ramp plate.
Driven Pulley Inspection:
Inspection and maintenance of the driven pulley, sheave, and spring.
Belt Inspection:
Inspection and replacement criteria for the drive belt.
Final Drive Type:
Chain Drive with enclosed gear reduction
Final Drive Oil Type:
GL-4 SAE 80 or SAE 80W-90 Gear Oil (typical specification)
Final Drive Oil Capacity:
Approximately 100-150 ml (typical for this application, specific value in manual)
Overall Length:
Approximately 1500-1600 mm (typical for this class of ATV, specific value in manual)
Overall Width:
Approximately 900-1000 mm (typical for this class of ATV, specific value in manual)
Overall Height:
Approximately 950-1050 mm (typical for this class of ATV, specific value in manual)
Dry Weight:
Approximately 100-120 kg (typical for this class of ATV, specific value in manual)
Payload Capacity:
Not specified, typically limited for youth ATVs.
Front Tire Size:
AT 16 x 7.00-7 (typical for this model)
Rear Tire Size:
AT 16 x 7.00-7 (typical for this model)
Wheelbase:
Approximately 1050 mm (typical, specific value in manual)
Ground Clearance:
Approximately 100-120 mm (typical, specific value in manual)
Front Brake Type:
Drum brake
Rear Brake Type:
Drum brake
Parking Brake:
Typically hand-operated lever or thumb lever.
Throttle Limiter:
Often features an adjustable throttle limiter for beginner riders.
Safety Flag Mount:
Provision for mounting a safety flag.
Headlight Taillight:
Standard front headlight and rear taillight for visibility.
Infotainment System:
Basic instrumentation including speedometer, odometer, and indicator lights. No advanced infotainment features.
Driver Assistance Features:
None. Focus is on fundamental ATV operation and safety.
Connectivity Options:
None.
Ignition System Type:
CDI (Capacitor Discharge Ignition)
Starting System Type:
Electric Start and Kick Starter
Charging System Type:
A.C. Generator with internal regulator
Evaporative Emission Control System:
Features an evaporative emission control system (EVAP) to reduce hydrocarbon emissions from the fuel tank.
Exhaust Emission Control System:
Designed to meet emission standards through engine tuning and exhaust system components.
Initial Break In Service:
Typically at 100-300 km or 1 month (refer to manual for exact interval and procedures).
Engine Oil Change Interval:
Every 1000 km or 6 months (typical, refer to manual for precise interval).
Air Filter Cleaning Replacement:
Check every 500 km, clean/replace as needed (depending on operating conditions).
Spark Plug Inspection Replacement:
Inspect every 1000 km, replace as needed (specific plug type in manual).
Valve Clearance Adjustment:
Typically at 1000 km or as specified in the manual for optimal performance.
Chain Lubrication Adjustment:
Lubricate chain every 500 km, check tension regularly.
Engine Oil Specification:
SAE 10W-40 API SG or higher
Final Drive Gear Oil Specification:
GL-4 SAE 80 or SAE 80W-90 Gear Oil
Brake Fluid Specification:
DOT 3 or DOT 4 brake fluid (check manual for confirmation)
Common Issues:
Typical issues for this class of ATV can include carburetor tuning, drive belt wear, and routine electrical connection maintenance. The manual will provide diagnostic steps for these and other potential problems.
Brand Heritage:
Kymco (Kwang Yang Motor Co., Ltd.) is a Taiwanese manufacturer of scooters, motorcycles, ATVs, and utility vehicles, known for its robust and reliable products, often sharing engineering with larger manufacturers.
Model Evolution:
The KXR 90 is part of Kymco's line of entry-level ATVs, designed for youth riders and a stepping stone into the powersports world. Model years may see minor updates to styling or componentry.
Production Region:
Primarily manufactured in Taiwan.
