Market Position:
Targeted at youth recreational ATV market, emphasizing ease of use and reliability for younger riders
Competitive Analysis:
Competes with entry-level ATVs from manufacturers like Yamaha (e.g., Raptor 90) and Honda (e.g., TRX90X), offering a balance of performance and rider-friendly features.
Key Features:
User-friendly operation, electric start, automatic transmission, and child-friendly power delivery. This manual provides the depth needed to maintain these features.
Coverage Areas:
All maintenance, service, diagnosis, and repair procedures for the Suzuki LT-Z90 QuadSport
Page Count:
Estimated 300-500 pages (typical for comprehensive service manuals of this era)
Manual Type:
Service and Repair Manual
Compatibility:
Compatible with Windows and Mac operating systems for downloading and viewing.
Systems Covered:
General Information, Periodic Maintenance, Engine, FI System Diagnosis, Fuel System and Throttle Body, Exhaust System, Cooling and Lubrication System, Chassis, Electrical System, Emission Control Information, Wiring Diagram
Engine Systems:
Engine specifications, internal components, cylinder head, piston, crankshaft, valve train, ignition system, starting system, lubrication system.
Fuel And Emission Systems:
Fuel pump, fuel injectors, throttle body, FI control module (ECU) diagnostics, evaporative emission control system.
Chassis And Suspension:
Frame inspection, front and rear suspension components, steering system, wheel hub and bearing service, swingarm service.
Electrical Systems:
Battery, charging system (stator, regulator/rectifier), starter motor, lighting system, ignition switch, wiring harness troubleshooting.
Procedures Included:
Step-by-step repair instructions, diagnostic procedures for Fuel Injection (FI) system, engine overhaul, chassis maintenance, electrical system troubleshooting, emission control system servicing
Engine Repair Procedures:
Engine assembly and disassembly, piston and cylinder inspection, valve clearance adjustment, timing chain inspection.
Transmission Service:
CVT belt inspection and replacement, clutch inspection, gearbox lubrication and inspection.
Diagnosis And Troubleshooting:
Systematic troubleshooting guides for common faults, FI system diagnostic codes (if applicable), electrical system diagnostics using a multimeter.
Technical Depth:
Comprehensive, covering basic maintenance to advanced diagnostics and component-level repair, mirroring dealership technician procedures
Engine Type:
Air-cooled, four-stroke, SOHC
Bore X Stroke:
49.0 mm x 48.0 mm
Horsepower:
Approx. 6.5 HP @ 7500 RPM (Estimate based on similar displacement engines)
Torque:
Approx. 5.0 lb-ft @ 6000 RPM (Estimate based on similar displacement engines)
Fuel Delivery:
Fuel Injection (FI) system
Throttle Body Size:
32 mm
Oil Type:
SAE 10W-40 API SE, SF, SG or higher, SJ, SL
Oil Capacity:
0.8 L (0.85 US qt) without filter change; 0.9 L (0.95 US qt) with filter change
Cooling Method:
Air-cooled
Transmission Type:
Automatic (CVT - Continuously Variable Transmission)
Drive Type:
2WD (Two-Wheel Drive)
Features:
Forward, Neutral, Reverse (F-N-R) gearbox with automatic clutch engagement
Transmission Fluid Type:
SAE 10W-30 API SE, SF, SG, SH, SJ, SL, SM
Transmission Fluid Capacity:
Not applicable (CVT system typically uses engine oil, capacity specified under engine oil)
Safety Ratings:
Designed for recreational off-road use, adhering to relevant safety standards for youth ATVs. Specific crash test ratings not typically published for this class.
Active Safety Features:
Throttle limiter screw (adjustable), automatic transmission, low center of gravity for stability.
Passive Safety Features:
Operator training recommended, use of helmet and protective gear essential.
Initial Service Interval:
First service typically recommended at 10 hours or 1 month of operation, followed by regular intervals (e.g., every 20 or 30 hours/months).
Engine Oil Change Interval:
Every 20 hours or 6 months, whichever comes first.
Air Filter Cleaning Interval:
Every 10 hours or as needed based on operating conditions.
Spark Plug Replacement Interval:
Check and clean every 20 hours, replace as needed.
Coolant Type:
Not applicable (Air-cooled engine)
Brake Fluid Type:
DOT 3 or DOT 4
Common Wear Items:
Tires, brake pads (if applicable for drum wear), spark plug, air filter, drive belt (CVT).
Typical Problems:
Carburetor/FI system clogging due to fuel varnish if not stored properly, chain adjustment, rear axle bearing wear, electrical connections.
Diagnostic Tools Required:
Basic hand tools, torque wrench, feeler gauges, multimeter, potentially a fuel injection diagnostic tool or scan tool (for advanced FI issues).
Brand Heritage:
Suzuki has a long history in powersports, including a strong presence in the ATV market with models like the legendary LT500R and LT250R. The LT-Z90 builds on this legacy for younger riders.
Model Evolution:
The LT-Z90 replaced earlier Suzuki youth ATV models and introduced a fuel-injected engine and more modern chassis design for its class.
Production Years:
Introduced around 2007/2008 and continued production for several years, including the 2008-2009 model years covered by this manual.
Manufacturing Location:
Typically manufactured in Japan or other Suzuki global production facilities.
