Market Segment:
Entry-level to mid-range sport/recreational ATV segment
Competitors:
Yamaha Blaster 200, Honda TRX250EX, Suzuki LT-Z250
Target Audience:
Beginner riders, recreational riders, young adults
Unique Selling Points:
Often praised for its agile handling and affordability in its class
Systems Covered:
Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, Fuel System, Cooling System, Exhaust System, Frame, Bodywork, Maintenance, Troubleshooting
Page Count:
Varies (typically 200-400 pages for a comprehensive service manual)
Manual Type:
Service and Repair Manual
Engine Mechanical:
Complete teardown, assembly, and inspection of engine components (cylinder, piston, crankshaft, valves, camshaft, etc.)
Fuel System:
Carburetor adjustment and overhaul, fuel pump, fuel lines, fuel filter replacement
Transmission Drivetrain:
Clutch inspection and adjustment, gear shifting mechanisms, drive axles, differential (if applicable)
Suspension:
Front and rear shock absorber inspection and replacement, A-arm bushings, ball joints
Steering:
Handlebar, steering shaft, tie rods, steering knuckle maintenance
Braking System:
Brake caliper overhaul, brake pad replacement, brake fluid flush, brake line inspection
Electrical System:
Battery testing, charging system (stator, regulator/rectifier), ignition system, lighting, starter motor, wiring diagrams
Frame Bodywork:
Frame inspection for damage, plastic body panel removal and installation, seat maintenance
Cooling System Procedures:
Radiator, fan, thermostat, coolant flushes, hose replacement
Exhaust System Maintenance:
Muffler inspection, exhaust pipe maintenance
Scheduled Maintenance:
Detailed procedures for routine maintenance tasks like oil changes, filter replacements, and lubrication
Troubleshooting:
Diagnostic charts and procedures for identifying and resolving common performance and operational issues
Repair Procedures:
Step-by-step instructions for component repair and replacement
Depth Of Information:
Comprehensive, covering routine maintenance to full engine rebuilds and complex electrical diagnostics
Engine Type:
4-stroke, SOHC, 2-valve
Bore X Stroke:
67.0 mm x 65.6 mm
Compression Ratio:
9.2:1 (typical, may vary by exact model year)
Horsepower:
Approximately 16-18 HP (estimated, specific dyno data not readily available)
Torque:
Approximately 14-16 Nm (estimated)
Fuel Delivery:
Carburetor (e.g., Mikuni VM26 or similar, specific model dependent)
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Cooling Method:
Air-cooled
Oil Type:
API SG or higher, SAE 10W-40 motorcycle oil recommended
Oil Capacity:
Approximately 1.8 - 2.0 Liters (including filter replacement, refer to manual for exact capacity)
Transmission Type:
Manual Transmission
Number Of Gears:
5-speed (forward) + Reverse
Clutch Type:
Wet multi-plate
Automatic Option:
No automatic transmission option available for this model
Final Drive:
O-ring sealed chain drive
Transmission Fluid Type:
API GL-4, SAE 80W-90 gear oil (check manual for specific grade and capacity)
Length:
Approximately 1,770 mm (70 in)
Width:
Approximately 1,040 mm (41 in)
Height:
Approximately 1,050 mm (41.3 in)
Wheelbase:
Approximately 1,210 mm (47.6 in)
Dry Weight:
Approximately 168 kg (370 lbs)
Ground Clearance:
Approximately 190 mm (7.5 in)
Rack Capacity Front:
Approximately 10 kg (22 lbs)
Rack Capacity Rear:
Approximately 20 kg (44 lbs)
Safety Features:
ATVs are designed for off-road use; user discretion and safety gear are paramount. No formal crash ratings like passenger vehicles.
Braking System Type:
Hydraulic disc brakes front and rear
Lighting:
Halogen headlights, taillight, brake light
Recommended Gear:
Helmet, goggles, gloves, boots, long sleeves, and pants
Infotainment System:
Basic analog instrumentation (speedometer, odometer, neutral indicator, high-beam indicator)
ABS:
No Anti-lock Braking System (ABS) equipped
Traction Control:
No traction control system equipped
Bluetooth Connectivity:
Not applicable
Engine Oil Change:
Every 1,000 km or 6 months (whichever comes first)
Air Filter Cleaning Replacement:
Clean every 500 km, replace as needed
Spark Plug Inspection Replacement:
Inspect every 1,000 km, replace as needed (NGK CR7E or equivalent recommended)
Valve Clearance Adjustment:
Every 2,000 km (refer to manual for specific clearances)
Brake Fluid Flush:
Every 12 months or as needed
Engine Oil Specification:
API SG or higher, SAE 10W-40 motorcycle oil
Brake Fluid Specification:
DOT 3 or DOT 4 brake fluid
Coolant Specification:
Ethylene glycol-based antifreeze with corrosion inhibitors (mix 50/50 with distilled water)
Transmission Oil Specification:
API GL-4, SAE 80W-90 gear oil
Common Wear Items:
Brake pads, front ball joints, chain and sprockets, wheel bearings
Potential Electrical Issues:
Regulator/rectifier failures, stator output degradation over time
Carburetor Tuning:
May require periodic adjustment or cleaning due to fuel variability or age
Manufacturer:
KYMCO (Kwang Yang Motor Co., Ltd.) is a Taiwanese manufacturer of scooters, motorcycles, ATVs, and utility vehicles.
Model Introduction:
The Mongoose series has been a staple in KYMCO's ATV lineup for many years, evolving through various engine sizes and feature sets.
Production Period:
The Mongoose 250 was primarily produced in the mid-2000s to early 2010s, with specific year variants existing.
Manufacturing Location:
Taiwan
