The 2007 Suzuki LT-Z90 QuadSport is an entry-level youth ATV engineered for recreational trail riding and introducing younger riders to ATV operation. Building on Suzuki's strong heritage in off-road vehicles, this model features a reliable 4-stroke, air-cooled 89cc engine, an automatic Continuously Variable Transmission (CVT), electric start, and essential safety features like an adjustable throttle limiter and a tether cord. Its design prioritizes ease of use, durability, and safety, making it a popular choice for families and young enthusiasts. This comprehensive factory service manual provides detailed information for the maintenance and repair of your 2007 Suzuki LT-Z90 QuadSport. It covers a wide range of areas including engine mechanicals, transmission and drivetrain, chassis, electrical systems, and bodywork. Within its approximately 300+ pages, you will find routine maintenance procedures, in-depth troubleshooting guides, diagnostic procedures, and specific repair instructions for components such as the carburetor, braking system, and suspension. This manual is an indispensable resource for owners and technicians seeking to ensure the optimal performance and longevity of the vehicle. 🏷️ Basic Information Identification Make: Suzuki Model: LT-Z90 QuadSport Year: 2007 Codes Oem Manual Code: 99500-10023-031 👋 Introduction Market Position Positioning: Entry-level youth ATV designed for recreational trail riding and learning basic ATV operation. Often considered a first ATV for younger riders. Competitive Analysis Competitors: Competes with similar youth ATVs from Honda (TRX90), Polaris (Predator 90), Arctic Cat (DVX90), and Yamaha (Grizzly 90). Key Features Features: Automatic transmission (CVT), electric start, reliable 4-stroke engine, safety features like throttle limiter, tether cord, and speed governor. Manual Value Proposition Value: Empowers owners and technicians with the detailed information needed for DIY repairs, preventative maintenance, and restoring the LT-Z90 to peak performance. 📋 Manual Details Coverage Areas Engine Service: Yes Transmission Service: Yes Chassis Service: Yes Electrical System Service: Yes Bodywork Service: Yes Maintenance Procedures: Yes Troubleshooting Guides: Yes Diagnostic Procedures: Yes Page Count Estimated Pages: Approx. 300+ Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Top end, bottom end, lubrication, cooling system, fuel system, ignition system Transmission Drivetrain: Automatic transmission (CVT), drive shafts, differential, final drive Suspension Steering: Front and rear suspension, steering knuckles, tie rods, steering column, handlebars Braking System: Front and rear brake systems (hydraulic disc), brake lines, calipers, master cylinders Electrical Components: Battery, charging system, lighting, ignition system, wiring diagrams, switches, fuses Fuel System: Carburetor, fuel lines, fuel pump, fuel tank Exhaust System: Muffler, exhaust pipe, heat shields Frame Body: Frame components, body panels, fenders, seat, racks Procedures Included Engine Rebuild: Complete engine disassembly, inspection, repair, and reassembly Carburetor Tuning: Adjustment, cleaning, and rebuilding of the carburetor Brake Bleeding: Procedure for bleeding hydraulic brake systems Suspension Alignment: Alignment procedures for front and rear suspension Electrical Troubleshooting: Step-by-step diagnostic procedures for electrical faults, including wiring diagrams Tire Wheel Service: Tire mounting, balancing, and wheel specifications Routine Maintenance: Oil changes, filter replacements, spark plug checks, chain adjustment Technical Depth Depth: Comprehensive: Covers everything from basic maintenance to full engine and transmission overhauls, including detailed diagnostic procedures. 📊 Manual Specifications File Format Format: Digital PDF Searchable: Yes (text-searchable PDF) Print Quality Printability: High-quality, printable pages Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, air-cooled Displacement: 89cc Bore X Stroke: 44.0 mm x 57.4 mm Compression Ratio: 9.2:1 Performance Horsepower: Approx. 6-7 HP (estimated, as exact figures are often not published for youth ATVs) Torque: N/A (specific figures not readily published) Fuel System Carburetor: Mikuni VM12SC Fuel Tank Capacity: 2.0 L (0.5 US gal, 0.4 Imp gal) Ignition System Ignition: CDI (Capacitor Discharge Ignition) Lubrication Oil Type: SAE 10W-40 API SE, SF or SG Oil Capacity: 0.8 L (0.85 US qt, 0.7 Imp qt) for oil change, 0.9 L (0.95 US qt, 0.8 Imp qt) for disassembly 🔧 Transmission Standard Transmission Type: Automatic Continuously Variable Transmission (CVT) with forward, neutral, and reverse Optional Optional Transmissions: N/A Features Drive System: Chain drive to rear axle Gear Reduction: N/A (CVT handles gear ratios) Fluid Specifications Transmission Oil Type: SAE 10W-30 API SE, SF or SG Fluid Capacities Transmission Oil Capacity: 0.27 L (0.29 US qt, 0.24 Imp qt) 📐 Dimensions Exterior Overall Length: 1510 mm (59.4 in) Overall Width: 960 mm (37.8 in) Overall Height: 935 mm (36.8 in) Wheelbase: 1030 mm (40.6 in) Ground Clearance: 105 mm (4.1 in) Interior Seat Height: 715 mm (28.1 in) Weights Curb Weight: 110 kg (242.5 lbs) Front Tire Size: AT19 x 7-8 Rear Tire Size: AT19 x 9-8 Wheel Bolt Pattern: N/A (Hub mounted) 🛡️ Safety Features Ratings Atv Safety Class: Youth ATV Active Features Throttle Limiter: Adjustable throttle limiter screw for speed control Tether Cord Switch: Standard safety tether cord that shuts off the engine if the rider falls off Parking...