Category:
Youth ATV / Entry-Level Sport ATV
Target Audience:
Young riders and beginners seeking a reliable, easy-to-handle sport ATV.
Key Competitors:
Honda TRX90X, Yamaha YFZ90 (later models), Kawasaki KFX90
Features:
Automatic transmission (CVT), electric start, low seat height, manageable power delivery, sporty styling.
Ease Of Use:
Designed for ease of operation, making it an excellent learning platform.
Engine Overhaul:
Complete
Transmission Service:
Complete
Electrical System Diagnostics:
Comprehensive
Suspension And Steering:
Complete
Frame And Bodywork:
Complete
Maintenance Procedures:
All Scheduled Maintenance
Troubleshooting Guides:
Extensive Fault Diagnosis
Technical Specifications:
All Necessary Data
Type:
Factory Service Manual / Repair Manual
Format:
Digital Download (PDF)
Engine:
Top End, Bottom End, Cooling System, Lubrication System, Carburetion, Ignition System, Starting System, Exhaust System
Transmission:
CVT (Continuously Variable Transmission) operation, maintenance, and overhaul
Drivetrain:
Chain drive, rear axle assembly, wheel hub maintenance
Suspension:
Front and rear suspension components, adjustment, and repair
Steering:
Steering linkage, handlebars, tie rods, and steering column
Brakes:
Front and rear drum/disc brake systems, hydraulic components, adjustments, and pad replacement
Electrical:
Battery, charging system (stator, regulator/rectifier), lighting, ignition coil, CDI unit, wiring diagrams
Fuel System:
Fuel tank, fuel lines, carburetor (Mikuni VM17SH), fuel filter
Body And Frame:
Chassis, body panels, seat, fenders, storage
Maintenance:
Oil changes, filter replacements, spark plug checks, chain adjustment, brake adjustments, carburetor cleaning, valve clearance adjustment
Troubleshooting:
Diagnostic charts, common problems and solutions (e.g., starting issues, poor running, electrical faults)
Repair:
Engine rebuild, transmission component replacement, suspension repair, brake system overhaul, electrical component replacement
Disassembly And Assembly:
Step-by-step instructions for all major components
Specifications:
Torque values, clearances, fluid capacities, electrical resistance values
Depth:
Comprehensive factory-level detail suitable for professional technicians and advanced DIY mechanics.
Engine Type:
4-stroke, Air-cooled, SOHC
Bore X Stroke:
47.0 mm x 51.0 mm
Valve Train:
SOHC, 2 valves per cylinder
Ignition System:
CDI (Capacitor Discharge Ignition)
Starting System:
Electric Starter
Horsepower Estimate:
Approx. 6-7 HP (actual figures often not publicly disclosed for youth ATVs)
Carburetor Model:
Mikuni VM17SH
Fuel Tank Capacity:
2.5 L (0.7 US gal)
Recommended Fuel:
Unleaded gasoline, Octane rating 87 or higher
Cooling Method:
Air-cooled
Transmission Type:
Automatic (CVT - Continuously Variable Transmission)
Drive System:
2WD (Rear Wheel Drive)
Gear Selection:
Forward, Neutral, Reverse
Clutch Type:
Automatic centrifugal clutch
Transmission Oil Type:
SAE 10W-30 API SE, SF or SG (refer to manual for exact specification)
Transmission Oil Capacity:
0.5 L (0.5 US qt)
Atv Safety:
This is a youth ATV and requires adult supervision and appropriate safety gear.
Throttle Limiter:
Adjustable throttle limiter screw for controlling maximum speed.
Safety Tether:
Not standard, but recommended for youth operation.
Footwells:
Full floorboards with heel guards for foot protection.
Handguards:
Standard on handlebars for hand protection.
Frame Design:
Steel frame designed for stability.
Protective Gear:
Helmet, eye protection, gloves, long sleeves, long pants, boots are mandatory.
Display Features:
Simple LCD display showing speed (if equipped), odometer, neutral indicator, and oil pressure warning light.
Features:
Focus on essential safety and operational features like the throttle limiter and electric start.
Features:
N/A (No electronic connectivity features)
Engine Oil Change:
Every 1,000 km or 6 months (refer to manual for exact intervals)
Spark Plug Inspection:
Every 1,000 km or 6 months
Air Filter Cleaning:
Every 1,000 km or 6 months, or more frequently in dusty conditions
Valve Clearance Check:
Every 4,000 km or 24 months
Brake Fluid Replacement:
Every 2 years
Engine Oil Specification:
SAE 10W-30, API SE, SF or SG
Engine Oil Capacity:
0.8 L (0.85 US qt) without filter change, 0.9 L (0.95 US qt) with filter change
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid
Common Problems:
Carburetor clogging due to infrequent use or fuel degradation, wear on CVT belt, electrical connector corrosion in wet environments.
Recommendation:
Regular cleaning, proper storage, and periodic fuel stabilizer use are crucial for longevity, especially for youth ATVs that may see intermittent use.
Atv History:
Suzuki has a long-standing reputation in the ATV market, known for reliable and performance-oriented machines across various displacements.
Lt90 Lineage:
The LT90 QuadSport followed Suzuki's tradition of developing youth-oriented ATVs, building on the success of previous models like the LT50 and LT80, offering increased displacement and improved features.
Manufacturing Location:
Japan (typical for Suzuki ATVs of this era)
