Category:
Premium High-Performance Utility ATV
Target User:
Ranchers, hunters, trail riders, and recreational users demanding robust power and capability.
Key Competitors:
Can-Am Outlander 800R, Yamaha Grizzly 700, Arctic Cat 700/1000 series.
Unique Selling Points:
850cc ProStar engine, independent rear suspension (IRS), available Electronic Power Steering (EPS), Polaris Variable Transmission (PVT).
Engine Power:
High output 850cc, liquid-cooled, DOHC, 8-valve, 4-stroke engine.
Suspension Design:
Dual A-arm front suspension with 8.2" travel; Dual A-arm rear suspension with 9.5" travel (IRS).
Steering Assistance:
Optional Electronic Power Steering (EPS) reduces steering effort significantly.
Transmission Type:
Automatic PVT (Polaris Variable Transmission) with Engine Braking.
Engine System:
Complete diagnosis, repair, and overhaul procedures for the 850cc ProStar engine.
Fuel System:
Detailed coverage of Electronic Fuel Injection (EFI) system, including fuel pump, injectors, sensors, and ECU troubleshooting.
Cooling System:
Radiator, fan, coolant flow, thermostat, and water pump diagnostics and service.
Transmission System:
Service and repair procedures for the Automatic (PVT) transmission, including belt inspection, clutch assembly, and gearbox.
Clutching System:
Primary and secondary clutch inspection, maintenance, and adjustment for optimal performance.
Final Drive System:
Front and rear differential, driveshaft, and axle service, including lubrication and seal replacement.
Body Frame:
Body panel removal and installation, frame inspection, and mounting hardware.
Steering Suspension:
Front and rear suspension component service, steering linkage, tie rods, wheel bearings, and shock absorbers.
Brake System:
Hydraulic brake system diagnosis, caliper service, pad replacement, bleeding procedures, and parking brake.
Electrical System:
Comprehensive electrical system coverage including starting, charging, lighting, ignition, sensors, ECU, and detailed wiring diagrams.
Routine Maintenance:
Scheduled maintenance tasks, fluid changes, filter replacements, lubrication points, and pre-ride inspections.
Troubleshooting:
Diagnostic charts and step-by-step troubleshooting guides for common and complex issues.
Engine Repair:
Detailed procedures for engine disassembly, component inspection, reassembly, and tuning.
Transmission Repair:
Procedures for PVT belt replacement, clutch adjustment, and general transmission upkeep.
Electrical Diagnostics:
Step-by-step diagnosis of electrical faults using wiring diagrams and component testing.
Suspension Alignment:
Front-end alignment procedures and specifications.
Brake Bleeding:
Proper hydraulic brake bleeding techniques.
Component Overhaul:
Detailed instructions for overhauling major components like the engine, transmission, and differentials.
Depth Of Coverage:
Comprehensive, factory-level technical information suitable for both novice DIYers and professional mechanics.
Detail Level:
Includes exploded views, torque specifications, diagnostic codes, and detailed wiring diagrams.
Engine Type:
4-stroke, DOHC, 4-valve per cylinder
Cooling Method:
Liquid-cooled
Horsepower Estimate:
~70 HP (specific to model variants, manual provides detailed dyno data)
Torque Estimate:
~60 lb-ft (specific to model variants, manual provides detailed dyno data)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type Recommendation:
Unleaded gasoline, 87 octane (minimum)
Transmission Type:
Automatic PVT (Polaris Variable Transmission)
Drive Modes:
High, Low, Neutral, Reverse, Park
Engine Braking:
Standard feature on PVT for downhill control.
Clutch System:
Dual centrifugal clutch system with primary and secondary sheaves.
Final Drive:
Sealed, constant velocity (CV) shaft drive to rear wheels, shaft drive to front differential (on 4x4 models).
Vehicle Classification:
Class 1 ATV (recreational use, often requires registration and safety training depending on jurisdiction)
Braking System:
Hydraulic disc brakes front and rear, sealed mechanical rear wheel brake.
Parking Brake:
Standard on transmission/rear brake caliper.
Lighting:
Dual 50W halogen headlights, dual brakelights/taillights.
Seat Belt Requirement:
Not standard on ATVs; riders must wear DOT-approved helmets and appropriate protective gear.
Display Features:
Basic digital instrument cluster displaying speed, RPM, fuel level, gear selection, odometer, trip meter, engine hours.
Power Steering:
Available Electronic Power Steering (EPS) system reduces rider fatigue.
Diagnostic Ports:
Access to EFI system diagnostics via a dedicated diagnostic connector.
Oil Change Engine:
Every 100 hours or annually (whichever comes first).
Air Filter Cleaning:
Inspect every 50 hours, clean/replace as needed based on operating conditions.
Pvt Belt Inspection:
Inspect every 100 hours for wear and damage.
Spark Plug Replacement:
Every 100 hours or annually.
Engine Oil Type:
Polaris PS-4 5W-50 Synthetic 4-stroke engine oil (or equivalent API CI-4 rated oil).
Engine Oil Capacity:
Approximately 2.5 US quarts (2.37 liters) with filter change (refer to manual for exact capacity).
Coolant Type:
Polaris Premium 2-Stroke Oil/Antifreeze (or equivalent ethylene glycol-based coolant with corrosion inhibitors).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Differential Oil Type:
Polaris Demand Drive Fluid (front differential); SAE 75W-90 Synthetic Gear Oil (rear differential/gearbox).
Common Wear Items:
PVT belt wear, tie rod ends, wheel bearings, front driveshaft U-joints (especially in heavy mud).
Potential Efi Concerns:
Dirty throttle body, faulty TPS (Throttle Position Sensor) or MAP (Manifold Absolute Pressure) sensor readings, fuel injector clogs.
Manufacturer:
Polaris Industries, founded 1954, known for snowmobiles and later ATVs and UTVs.
Predecessor Models:
Polaris Sportsman series (e.g., 700 Twin, 800 Twin).
Innovation Introduction:
The 850cc ProStar engine platform was a significant upgrade in power and efficiency for Polaris ATVs.
Manufacturing Location:
Roseau, Minnesota, USA (primary manufacturing)