Positioning:
Entry-level youth ATV designed for recreational trail riding and learning basic ATV operation. Often considered a first ATV for younger riders.
Competitors:
Competes with similar youth ATVs from Honda (TRX90), Polaris (Predator 90), Arctic Cat (DVX90), and Yamaha (Grizzly 90).
Features:
Automatic transmission (CVT), electric start, reliable 4-stroke engine, safety features like throttle limiter, tether cord, and speed governor.
Value:
Empowers owners and technicians with the detailed information needed for DIY repairs, preventative maintenance, and restoring the LT-Z90 to peak performance.
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
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
Depth:
Comprehensive: Covers everything from basic maintenance to full engine and transmission overhauls, including detailed diagnostic procedures.
Engine Type:
4-stroke, SOHC, air-cooled
Bore X Stroke:
44.0 mm x 57.4 mm
Horsepower:
Approx. 6-7 HP (estimated, as exact figures are often not published for youth ATVs)
Torque:
N/A (specific figures not readily published)
Carburetor:
Mikuni VM12SC
Fuel Tank Capacity:
2.0 L (0.5 US gal, 0.4 Imp gal)
Ignition:
CDI (Capacitor Discharge Ignition)
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 Type:
Automatic Continuously Variable Transmission (CVT) with forward, neutral, and reverse
Optional Transmissions:
N/A
Drive System:
Chain drive to rear axle
Gear Reduction:
N/A (CVT handles gear ratios)
Transmission Oil Type:
SAE 10W-30 API SE, SF or SG
Transmission Oil Capacity:
0.27 L (0.29 US qt, 0.24 Imp qt)
Engine Oil Change:
Every 100 hours or 6 months, whichever comes first.
Air Filter Cleaning:
Every 20 hours or 1 month; replace every 100 hours or 1 year.
Spark Plug Check:
Every 20 hours or 1 month; replace as needed.
Chain Lubrication Adjustment:
Every 10 hours or 1 month.
Brake Fluid Check:
Every 6 months.
Valve Clearance Check:
Every 100 hours or 1 year.
Engine Oil Viscosity:
SAE 10W-40
Engine Oil API Service:
API SE, SF or SG
Common Problems:
Carburetor clogging due to fuel quality or lack of use, CVT belt wear, chain and sprocket wear, front suspension wear in heavy use.
Preventative Measures:
Regular fuel stabilizer use, proper cleaning of the air filter, timely chain lubrication, and regular inspection of wear items.
Heritage:
Suzuki has a long-standing reputation for producing reliable and capable off-road vehicles, including a strong history in ATVs.
Predecessors:
The LT-Z90 succeeded earlier Suzuki youth ATVs, building upon their design and engineering principles.
Design Philosophy:
Focus on ease of use, safety, and durability for young riders.
Production Period:
The LT-Z90 was produced for several years, with this manual covering the 2007 model, which represents a common iteration.
Manufacturing Location:
Typically manufactured in Asian markets where Suzuki has significant production facilities.
