Segment:
Mid-size utility ATV, known for reliability and versatility.
Competitors:
Honda FourTrax, Polaris Sportsman, Kawasaki Brute Force.
Distinguishing Features:
Shaft-driven 4WD, reliable air-cooled engine, comfortable riding position, rugged construction.
Manual Utility:
Enables DIY maintenance, repairs, and troubleshooting, saving significant labor costs.
Engine:
Complete overhaul, troubleshooting, diagnostics, carburetor, ignition, cooling, lubrication.
Transmission:
Automatic transmission (Ultramatic®), gear shifting mechanisms, clutch, drive shaft, differential maintenance.
Drivetrain:
4x4 system, engage/disengage mechanisms, CV joints, wheel hubs, drive axles.
Suspension:
Front and rear suspension systems, shock absorbers, control arms, bushings, wheel bearings.
Brakes:
Hydraulic brake system, master cylinders, brake lines, calipers, brake pads, brake fluid specifications.
Electrical:
Starting system, charging system (stator, regulator/rectifier), battery maintenance, lighting, wiring diagrams, fuses, relays.
Fuel System:
Fuel tank, fuel pump, fuel filter, carburetor (Mikuni BS32), fuel lines, air filter maintenance.
Cooling System:
Radiator, fan, coolant type and capacity, thermostat operation.
Bodywork Chassis:
Frame inspection, body panel removal/installation, seat, handlebars, racks, fenders.
Scheduled Maintenance:
Detailed service intervals for oil changes, filter replacements, valve adjustments, lubrication points.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon problems, fault finding charts.
Repair Procedures:
Step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly.
Rebuilds:
Engine, transmission, and carburetor rebuilds with detailed component specifications.
Adjustments:
Carburetor tuning, valve lash adjustment, brake lever free play, throttle cable adjustment.
Diagnostics:
Electrical system diagnostics, ignition timing checks, compression testing.
Wiring Schematics:
Comprehensive electrical wiring diagrams for all vehicle systems.
Depth Level:
Professional-grade; covers basic maintenance to complete engine and component overhauls.
Diagnostic Capability:
Advanced troubleshooting and diagnostic procedures.
Visual Aids:
Hundreds of detailed photos and exploded diagrams for clarity.
Engine Type:
Single-cylinder, 4-stroke, SOHC, 2-valve
Bore X Stroke:
83.0 mm x 64.5 mm
Cooling System:
Air-cooled with fan assist
Horsepower:
Approx. 19.5 HP @ 6,500 RPM (estimate based on similar models)
Torque:
Approx. 20.1 lb-ft @ 5,000 RPM (estimate based on similar models)
Carburetor:
Mikuni BS32, single
Fuel Type:
Unleaded gasoline, 87 octane or higher
Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 or 20W-50 motorcycle oil (check manual for exact spec)
Spark Plug Type:
NGK CR7E (verify with manual)
Intake Clearance:
0.08 - 0.12 mm (0.003 - 0.005 in) (cold engine, verify with manual)
Exhaust Clearance:
0.12 - 0.16 mm (0.005 - 0.006 in) (cold engine, verify with manual)
Initial Service:
Recommended at 100-200 miles or 1 month (verify with manual for break-in service).
Engine Oil Change:
Every 1,000 miles or 6 months, or more frequently under severe use (verify with manual).
Air Filter Cleaning:
Regular inspection and cleaning, especially in dusty conditions (verify interval with manual).
Valve Adjustment:
Every 2,000 miles or 12 months (verify with manual).
Engine Oil Spec:
Yamalube 4 (or equivalent) 10W-40 or 20W-50 motorcycle oil meeting API service classification SG or higher.
Brake Fluid Spec:
DOT 3 or DOT 4 hydraulic brake fluid.
Coolant Spec:
Permanent type antifreeze coolant (ethylene glycol based) with demineralized water, 50/50 mix recommended.
Common Wear Items:
CVT belt wear, brake pad wear, suspension bushings.
Potential Electrical:
Occasional issues with voltage regulator/rectifier under heavy load or age, water ingress to connectors.
Carburetor Maintenance:
Susceptible to clogging from fuel varnish if not run regularly or stabilized.