Vehicle Class:
Entry-level youth ATV, designed for recreational riding and skill development.
Target Demographic:
Young riders and families looking for a safe and capable off-road vehicle.
Competitors:
Honda TRX90, Yamaha Raptor 90, Kawasaki KFX90.
Youth Oriented:
Designed with safety and ease of use for younger riders in mind, often featuring automatic transmissions and speed limiters.
Manual Value Proposition:
Provides essential factory-level information for maintaining, repairing, and troubleshooting the LT-Z90, empowering owners to perform tasks themselves and understand their vehicle's mechanics.
Engine Mechanical:
Complete tear down and rebuild, lubrication, cylinder, piston, crankshaft, connecting rod, camshaft, valves, valve clearance, ignition system, magneto, stator, flywheel, starting system (kickstart, starter).
Fuel System:
Carburetor (carb, carburettor) overhaul, adjustment, troubleshooting, fuel pump, fuel tank, mixture screw.
Drivetrain:
Transmission, primary reduction gear, drive shaft, gearshift, clutch, swingarm, rear axle, suspension (front forks, rear struts/shocks).
Braking System:
Front and rear brake systems (pads, rotors, hydraulic components).
Electrical System:
Ignition, charging system (rectifier, regulator, battery, stator), lighting, switches.
Body And Frame:
Frame, body panels, plastic components, fenders, seat.
Wheels And Tires:
Tire specifications, wheel information.
Maintenance:
Scheduled maintenance, fluid changes (coolant, oil), lubrication, filter replacement, battery maintenance, tire pressure.
Repair:
Complete engine overhaul, transmission repair, suspension rebuild, brake servicing, electrical component replacement.
Troubleshooting:
Diagnostic procedures for common problems (e.g., no spark, starting issues, engine performance), error codes.
Installation:
Component installation and adjustment procedures.
Depth Level:
Comprehensive factory-level repair information, including detailed specifications and procedures for DIY enthusiasts and professional technicians.
Engine Type:
Four-stroke, SOHC
Engine Displacement:
89 cc
Bore X Stroke:
Approximately 47.0 mm x 51.0 mm (specific values detailed in manual).
Compression Ratio:
Approximately 9.2:1 (specific values detailed in manual).
Horsepower:
Not officially published by Suzuki for youth models, estimated to be in the 6-8 HP range for this class.
Torque:
Not officially published by Suzuki, estimated to be suitable for its class.
Fuel Delivery:
Carburetor
Carburetor Model:
Mikuni VM17 (typical for this model, specific designation in manual).
Fuel Type:
Unleaded Gasoline
Fuel Tank Capacity:
Approximately 1.4 US gal (5.5 L) (specific value in manual).
Oil Type:
API SG or higher, SAE 10W-40 motorcycle oil recommended (specific viscosity and classification in manual).
Oil Capacity:
Approximately 1.0 US qt (0.95 L) (specific capacity for oil change and with filter change detailed in manual).
Cooling Method:
Air-cooled
Length:
Approximately 64.0 in (1625 mm) (specific value in manual).
Width:
Approximately 38.0 in (965 mm) (specific value in manual).
Height:
Approximately 39.0 in (990 mm) (specific value in manual).
Dry Weight:
Approximately 235 lbs (107 kg) (specific value in manual).
Curb Weight:
Typically higher than dry weight due to fluids, exact figure in manual.
Payload Capacity:
Not typically specified for youth ATVs, but designed for rider weight.
Front Tire Size:
AT 16 x 7.0-7 (specific tire size in manual).
Rear Tire Size:
AT 18 x 9.5-8 (specific tire size in manual).
Wheelbase:
Approximately 43.0 in (1090 mm) (specific value in manual).
Atv Safety Standards:
Manufactured to meet industry standards for youth ATVs.
Throttle Limiter:
Often adjustable throttle limiter screw for parental control (covered in manual).
Speed Governor:
May include features to limit top speed, adjustable by parent/guardian (details in manual).
Engine Guard:
Provides underbody protection.
Footwells:
Designed to protect rider's feet.
Oil Change Interval:
Typically every 100 hours or annually (specific recommendation in manual).
Air Filter Cleaning:
Frequent cleaning recommended, especially in dusty conditions (procedure in manual).
Spark Plug Replacement:
Recommended at intervals specified in the manual for optimal performance.
Valve Clearance Check:
Scheduled checks and adjustments as per manual recommendations.
Engine Oil Viscosity:
SAE 10W-40 (specific classification API SG or higher detailed in manual).
Coolant Type:
N/A (Air-cooled engine).
Brake Fluid Type:
DOT 3 or DOT 4 (specific type and specification in manual).
Carburetor Clogging:
Common in off-road vehicles due to fuel quality and sitting periods; requires regular cleaning and proper fuel storage.
Drive Chain Adjustment:
Requires periodic tension adjustment to prevent wear and potential damage.
Throttle Cable Wear:
Can stretch or fray over time, requiring adjustment or replacement.
Suzuki Offroad:
Suzuki has a long-standing reputation for producing robust and reliable off-road vehicles, including ATVs and dirt bikes.
Lt Z Lineup:
The LT-Z90 is part of Suzuki's popular line of sport ATVs, scaled down for younger riders.
Production Gaps:
Production was not continuous from 2010-2013, with a restart for the 2014 model year. The manual covers the years it was produced.