Category:
        
        
            Youth/Entry-Level ATV
        
     
    
        
            Target Audience:
        
        
            Young riders and recreational users.
        
     
    
    
        
            Competitors:
        
        
            Honda TRX90, Suzuki LT-Z90, Polaris Sportsman 90.
        
     
    
    
        
            Vehicle Attributes:
        
        
            User-friendly, reliable, robust chassis, easy maintenance.
        
     
    
        
            Manual Attributes:
        
        
            Comprehensive coverage, detailed diagrams, searchable and printable format.
        
     
 
    
    
    
        
            Engine:
        
        
            Complete overhaul, disassembly, reassembly, internal components, performance tuning.
        
     
    
        
            Fuel System:
        
        
            Carburetor specifications, adjustments (pilot jet, mixture screw), fuel pump, fuel lines, fuel tank.
        
     
    
        
            Ignition System:
        
        
            CDI, stator, coil, spark plug, timing, troubleshooting no spark.
        
     
    
        
            Transmission Drivetrain:
        
        
            Primary reduction gear, clutch, gears, drive shaft, reverse gear, axle.
        
     
    
        
            Suspension:
        
        
            Front forks, rear struts/shocks, swingarm, linkage, adjustments.
        
     
    
        
            Brakes:
        
        
            Front and rear brake systems, rotor specifications, pad replacement, hydraulic system maintenance.
        
     
    
        
            Electrical System:
        
        
            Battery, charging system (rectifier, magneto), lights (headlight, taillight), switches, fuses, wiring diagrams (implied).
        
     
    
        
            Bodywork Plastics:
        
        
            Panel removal, plastic component installation and repair.
        
     
    
    
        
            Maintenance:
        
        
            Scheduled maintenance, fluid changes, filter replacements, lubrication points.
        
     
    
        
            Troubleshooting:
        
        
            Comprehensive guides for common problems, error code diagnosis (if applicable to the model's generation).
        
     
    
        
            Repair:
        
        
            Complete tear-down and rebuild procedures for all major components.
        
     
    
        
            Diagnostics:
        
        
            Detailed diagnostic steps for various system failures.
        
     
    
        
            Technical Specifications:
        
        
            Torque specifications, valve clearance, fluid capacities, tire pressure.
        
     
    
        
            Parts Identification:
        
        
            Illustrated part diagrams for component identification.
        
     
    
    
        
            Depth:
        
        
            Full factory-level service and repair information, suitable for DIY and professional mechanics.
        
     
 
    
    
    
        
            Engine Type:
        
        
            4-Stroke, Air-Cooled, SOHC
        
     
    
    
        
            Bore X Stroke:
        
        
            54 mm x 54 mm (typical for this class)
        
     
    
        
            Compression Ratio:
        
        
            9.1:1 (typical for this class)
        
     
    
        
            Carburetor Size:
        
        
            Mikuni VM24 (typical for this class)
        
     
    
    
        
            Horsepower:
        
        
            Approximately 9-10 HP (estimated)
        
     
    
        
            Torque:
        
        
            Not typically published for this class, but designed for low-end torque.
        
     
    
    
        
            Fuel Delivery:
        
        
            Carburetor
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline
        
     
    
    
        
            Recommended Oil Viscosity:
        
        
            Yamalube 4 (10W-40) or equivalent SAE 10W-40 API SG or higher
        
     
    
        
            Oil Capacity:
        
        
            Approximately 1.5 L (1.6 US qt) with filter change (refer to manual for exact specification).
        
     
 
    
    
    
        
            Length:
        
        
            Approximately 1655 mm (65.2 in)
        
     
    
        
            Width:
        
        
            Approximately 1005 mm (39.6 in)
        
     
    
        
            Height:
        
        
            Approximately 950 mm (37.4 in)
        
     
    
    
        
            Dry Weight:
        
        
            Approximately 118 kg (260 lbs)
        
     
    
        
            Ground Clearance:
        
        
            Approximately 114 mm (4.5 in)
        
     
    
    
        
            Front Tire Size:
        
        
            AT18x7-8 (typical)
        
     
    
        
            Rear Tire Size:
        
        
            AT18x9-8 (typical)
        
     
    
        
            Tire Pressure Psi Front:
        
        
            1.4 psi (refer to manual)
        
     
    
        
            Tire Pressure Psi Rear:
        
        
            1.4 psi (refer to manual)
        
     
 
    
    
    
        
            Safety Standards:
        
        
            Designed to meet ANSI standards for recreational ATVs.
        
     
    
    
        
            Braking System:
        
        
            Hydraulic disc brakes (front and rear).
        
     
    
        
            Throttle Limiter:
        
        
            Often equipped with a throttle limiter screw for beginner riders.
        
     
    
    
        
            Handlebars:
        
        
            Standard handlebars with comfortable grips.
        
     
    
        
            Footwells:
        
        
            Wide, rugged footwells for rider comfort and safety.
        
     
 
    
    
    
        
            Engine Oil Change:
        
        
            Every 1000 km or 6 months, whichever comes first (refer to manual for exact Yamaha recommendation).
        
     
    
        
            Air Filter Cleaning:
        
        
            Every 1000 km or 6 months, or more frequently in dusty conditions.
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 6000 km (refer to manual for specific plug type and gap).
        
     
    
        
            Valve Clearance Check:
        
        
            Every 6000 km (specific clearances in manual).
        
     
    
    
        
            Coolant Type:
        
        
            Ethylene glycol-based coolant with demineralized water (refer to manual for Yamaha specific recommendation).
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 3 or DOT 4 (refer to manual for exact specification).
        
     
    
    
        
            Common Problems:
        
        
            Carburetor gumming if not run regularly, occasional CVT belt wear, minor electrical issues if exposed to excessive water.
        
     
    
    
        
            Storage Recommendations:
        
        
            Fuel stabilizer, battery tender, clean and dry storage are recommended for extended periods.