The Suzuki LT90 Z QuadSport, produced from 2007 to 2009, represents Suzuki's commitment to reliable and user-friendly youth ATVs. Designed as an entry-level sport ATV, it features an automatic Continuously Variable Transmission (CVT), electric start, and a manageable 89 cc air-cooled engine, making it an ideal platform for young riders and beginners. Its sporty styling, coupled with features like full floorboards and handguards, enhances both its appeal and rider protection. The LT90 QuadSport builds upon Suzuki's extensive ATV heritage, offering a dependable and engaging experience for its intended audience. This comprehensive factory service manual provides detailed guidance for the maintenance, diagnosis, and repair of the Suzuki LT90 Z QuadSport. It covers all essential systems, including complete engine overhaul, transmission service, electrical system diagnostics, suspension and steering, braking system, and frame and bodywork. The manual includes extensive troubleshooting guides, detailed technical specifications, and step-by-step procedures for all scheduled maintenance and repairs. Its factory-level detail ensures that owners, mechanics, and technicians have the necessary information to keep this vehicle operating at its best. 🏷️ Basic Information Identification Make: Suzuki Model: LT90 Z QuadSport Model Variant: QuadSport Production Years: 2007, 2008, 2009 Codes Chassis Code: LT90K7, LT90K8, LT90K9 (based on model year) 👋 Introduction Market Position Category: Youth ATV / Entry-Level Sport ATV Target Audience: Young riders and beginners seeking a reliable, easy-to-handle sport ATV. Competitive Analysis Key Competitors: Honda TRX90X, Yamaha YFZ90 (later models), Kawasaki KFX90 Key Features 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. 📋 Manual Details Coverage Areas Engine Overhaul: Complete Transmission Service: Complete Electrical System Diagnostics: Comprehensive Suspension And Steering: Complete Braking System: Complete Frame And Bodywork: Complete Maintenance Procedures: All Scheduled Maintenance Troubleshooting Guides: Extensive Fault Diagnosis Technical Specifications: All Necessary Data Page Count Estimated Pages: 200-300 Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered 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 Procedures Included 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 Technical Depth Depth: Comprehensive factory-level detail suitable for professional technicians and advanced DIY mechanics. 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text content for quick information retrieval. Printability: Printable pages for physical reference. Print Quality Image Resolution: High-resolution for clear diagrams and illustrations. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, Air-cooled, SOHC Displacement: 89 cc Bore X Stroke: 47.0 mm x 51.0 mm Compression Ratio: 9.5:1 Valve Train: SOHC, 2 valves per cylinder Ignition System: CDI (Capacitor Discharge Ignition) Starting System: Electric Starter Performance Horsepower Estimate: Approx. 6-7 HP (actual figures often not publicly disclosed for youth ATVs) Torque Estimate: N/A Fuel System Carburetor Model: Mikuni VM17SH Fuel Tank Capacity: 2.5 L (0.7 US gal) Recommended Fuel: Unleaded gasoline, Octane rating 87 or higher Cooling System Cooling Method: Air-cooled 🔧 Transmission Standard Transmission Type: Automatic (CVT - Continuously Variable Transmission) Drive System: 2WD (Rear Wheel Drive) Features Gear Selection: Forward, Neutral, Reverse Clutch Type: Automatic centrifugal clutch Fluid Specification Transmission Oil Type: SAE 10W-30 API SE, SF or SG (refer to manual for exact specification) Fluid Capacity Transmission Oil Capacity: 0.5 L (0.5 US qt) 📐 Dimensions Exterior Overall Length: 1,455 mm (57.3 in) Overall Width: 955 mm (37.6 in) Overall Height: 960 mm (37.8 in) Wheelbase: 1,010 mm (39.8 in) Ground Clearance: 115 mm (4.5 in) Weights Curb Weight: 110 kg (243 lbs) Payload Capacity: N/A (Designed for rider only) Tire Size Front Tire: AT 16 x 7.00-7 Rear Tire: AT 16 x 7.00-7 Wheelbase Front Track: 760 mm (29.9 in) Rear Track: 770 mm (30.3 in) 🛡️ Safety Features Ratings Atv Safety: This is a youth ATV and requires adult supervision and appropriate safety gear. Active Features Throttle Limiter: Adjustable throttle limiter screw for controlling maximum speed....