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Introduction
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Market Position
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Segment:
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Entry-level to mid-range utility ATV
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Target Audience:
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Recreational riders, light agricultural use, trail riding
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Competitive Analysis
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Competitors Era:
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Honda TRX300/300FW, Kawasaki Bayou 300, Suzuki LT-F250/300F, Polaris Sportsman 400
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Key Features
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Engine Type:
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Reliable air-cooled 4-stroke single-cylinder engine
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Drivetrain:
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Available in 2WD and 4WD configurations, offering versatility
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Suspension:
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Independent front suspension (likely), swingarm rear suspension
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Transmission:
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Automatic (CVT-like or torque converter) transmission with reverse
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Manual Coverage
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Systems Covered
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Engine:
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Engine overhaul, disassembly, assembly, tuning, lubrication, cooling system, fuel system, exhaust system
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Transmission:
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Clutch, gearbox, drive shafts, differentials (for 4WD models), final drive
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Chassis:
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Frame, suspension (front and rear), steering system, wheels, tires
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Brakes:
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Brake system diagnosis, repair, fluid replacement, caliper and master cylinder servicing
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Electrical:
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Ignition system, lighting, starting system, charging system, battery, wiring diagrams, troubleshooting electrical faults
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Bodywork:
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Body panel removal and installation, fenders, seat, handle bars
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Procedures Included
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Maintenance:
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Scheduled maintenance, oil changes, filter replacements, spark plug checks, valve adjustments, lubrication points
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Troubleshooting:
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Diagnostic procedures for common problems, fault finding guides, diagnostic charts
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Repair:
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Step-by-step repair instructions for all major components and systems
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Rebuilds:
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Complete engine rebuild procedures, gearbox overhauls
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Specifications:
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Torque specifications, clearances, fluid capacities, electrical values
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Technical Depth
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Depth:
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Expert level, covering from routine maintenance to complete engine and transmission overhauls
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Detail Level:
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Includes detailed diagrams, exploded views, and specific step-by-step instructions
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Engine Specifications
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Primary Engine
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Type:
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Air-cooled, 4-stroke, SOHC, single-cylinder
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Displacement:
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Approximately 230cc (229cc is commonly cited)
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Bore X Stroke:
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Specifics vary by exact model year, but typical for this displacement
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Compression Ratio:
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Specifics vary by exact model year, but typically around 9.0:1 to 10.0:1
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Valve Configuration:
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SOHC (Single Overhead Camshaft), 2 valves per cylinder
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Performance
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Horsepower Estimated:
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Approximately 15-18 HP (at crankshaft)
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Torque Estimated:
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Approximately 13-15 lb-ft (at crankshaft)
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Fuel System
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Carburetor:
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Mikuni VM Series carburetor (e.g., VM26SS or similar)
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Fuel Type:
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Unleaded gasoline (87 octane recommended)
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Lubrication
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Oil Type:
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Yamalube 4W or equivalent SAE 10W-30 or 20W-40 motorcycle/ATV engine oil (check manual for specific viscosity)
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Oil Capacity:
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Approximately 1.5 - 1.8 liters (check manual for exact capacity with filter change)
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Ignition
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System:
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CDI (Capacitor Discharge Ignition)
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Spark Plug:
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NGK CR7E or similar (verify with manual)
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Dimensions
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Exterior
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Length:
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Approx. 73.6 inches (1870 mm)
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Width:
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Approx. 43.3 inches (1100 mm)
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Height:
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Approx. 43.7 inches (1110 mm)
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Wheelbase:
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Approx. 49.2 inches (1250 mm)
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Weights
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Dry Weight Estimated:
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Approx. 463 lbs (210 kg) for 2WD, slightly more for 4WD
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Curb Weight Estimated:
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Approx. 485 lbs (220 kg) (includes all necessary fluids)
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Cargo
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Front Rack Capacity Estimated:
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Approx. 44 lbs (20 kg)
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Rear Rack Capacity Estimated:
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Approx. 66 lbs (30 kg)
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Towing
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Towing Capacity Estimated:
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Typically around 1102 lbs (500 kg)
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Wheels Tires
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Front Tire Size:
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AT22x7-10 or similar
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Rear Tire Size:
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AT22x10-10 or similar
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Wheel Bolt Pattern:
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4x110 mm (typical for Yamaha)
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Maintenance
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Service Intervals
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Oil Change:
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Every 1,000 km or 6 months (check manual for precise interval and conditions)
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Air Filter Cleaning:
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Every 500 km or annual cleaning/replacement (depending on operating conditions)
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Spark Plug Check:
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Every 2,000 km or annually
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Valve Adjustment:
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Every 4,000 km or 2 years
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Fluid Specifications
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Engine Oil Viscosity:
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SAE 10W-30 or 20W-40 (check manual for optimal temperature range)
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Brake Fluid Type:
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DOT 3 or DOT 4 hydraulic brake fluid (check manual for specific recommendation)
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Coolant Type:
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N/A (Air-cooled engine)
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Known Issues
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Carburetor Fouling:
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Can be prone to carburetor gumming if not run regularly or if stale fuel is used; requires cleaning and proper jetting.
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Drive Belt Wear:
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CVT drive belts can wear over time and require periodic inspection and replacement, especially under heavy load.
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Carburetor Jetting:
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Carburetor jetting may need adjustment for altitude changes or aftermarket exhaust/air filter modifications.
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Starter Solenoid:
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Occasional failure of the starter solenoid can prevent engine cranking.
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