Category:
Premium Utility ATV
Target Audience:
Recreational riders, hunters, farmers, and general utility users seeking a powerful and comfortable ATV.
Key Competitors:
Can-Am Outlander, Arctic Cat Thundercat, Yamaha Grizzly, Honda FourTrax Foreman.
Engine Power:
800cc V-twin engine delivering robust power and torque.
Touring Comfort:
Ergonomic design, comfortable seating for rider and passenger, storage solutions.
A Arm Suspension:
Independent front and rear suspension for superior ride quality and handling.
Efi System:
Electronic Fuel Injection for optimal performance and fuel efficiency in various conditions.
AWD System:
On-Demand AWD for excellent traction when needed.
Engine System:
Complete overhaul, tuning, diagnostics, and repair of the ProStar 800 EFI engine.
Fuel System:
EFI system troubleshooting, fuel pump, injectors, throttle body, fuel filter replacement.
Ignition System:
CDI, spark plugs, ignition coils, timing adjustments.
Cooling System:
Radiator, fan, thermostat, coolant flush and replacement.
Exhaust System:
Muffler, exhaust pipe, catalytic converter inspection and replacement.
Transmission System:
PVT (Polaris Variable Transmission) operation, belt inspection/replacement, clutch service, gearcase maintenance.
Drivetrain:
AWD system, front differential, rear differential, driveshafts, CV joints, wheel bearings.
Suspension:
Front and rear suspension components, shock absorbers, A-arms, bushings, ball joints, alignment.
Steering:
Handlebar, tie rods, steering post, steering rack/mechanism, EPS (Electronic Power Steering) if applicable.
Braking System:
Front and rear hydraulic brakes, brake pads, rotors, calipers, brake lines, master cylinders, bleeding procedures.
Electrical System:
Battery, charging system (stator, regulator/rectifier), starter motor, lighting, accessories, wiring diagrams.
Frame And Body:
Chassis inspection, plastic body panels, seat, rack systems, fenders.
Troubleshooting:
Diagnostic charts for common problems, fault codes, performance issues.
Maintenance:
Oil changes, filter replacements, lubrication points, brake adjustments, tire pressure checks.
Repair:
Component disassembly, reassembly, part replacement for all covered systems.
Diagnostics:
Step-by-step troubleshooting guides for electrical and mechanical issues.
Rebuilds:
Complete engine and transmission rebuild procedures.
Specifications:
Torque specifications for all fasteners, fluid capacities, electrical specifications.
Depth:
Comprehensive, covering everything from basic maintenance to full engine and transmission rebuilds.
Detail Level:
Detailed exploded views, diagrams, and step-by-step instructions.
Engine Type:
Liquid-cooled, 4-stroke, SOHC, V-twin
Displacement:
760cc (approx.)
Bore X Stroke:
76 mm x 74.5 mm (typical for this engine family)
Compression Ratio:
9.5:1 (typical)
Horsepower:
Approx. 50-55 HP (estimated)
Torque:
Approx. 48-52 lb-ft (estimated)
Fuel Delivery:
Electronic Fuel Injection (EFI) with dual throttle bodies
Fuel Type:
Unleaded gasoline, minimum 87 octane
Oil Type:
SAE 5W-50 Synthetic (Refer to manual for specific Polaris recommendations)
Oil Capacity:
Approx. 2.0 Quarts (with filter change) (Refer to manual for exact capacity)
Rollover Protection:
ATVs are not subject to formal NCAP-style crash ratings; operator safety depends on responsible riding and protective gear.
Braking System:
Hydraulic disc brakes front and rear for reliable stopping power.
A Arm Design:
Independent suspension contributes to stability and control.
AWD Engagement:
On-Demand AWD for enhanced traction in slippery conditions.
Ergonomics:
Designed for rider comfort and control, reducing fatigue.
Lighting:
Dual halogen headlights and a single rear tail/brake light for visibility.
Operator Training:
Manual strongly emphasizes safe operating practices and the use of PPE (Personal Protective Equipment).
Instrument Cluster:
Digital/analog gauge cluster displaying speed, RPM, fuel level, gear indicator, odometer, trip meter, AWD status.
Powertrain Management:
EFI system automatically adjusts fuel delivery for optimal performance and emissions.
Engine Braking:
Integrated engine braking (EB) via the PVT system assists in slowing down, especially on descents.
Accessory Power:
Pre-wired for accessories, often includes a 12V power outlet.
Engine Oil Change:
Every 100 hours or 6 months, whichever comes first.
Spark Plug Replacement:
Inspect every 100 hours, replace as needed.
Air Filter Cleaning:
Inspect every 50 hours, clean or replace as needed, more frequently in dusty conditions.
Transmission Belt Inspection:
Inspect every 100 hours for wear and damage.
Gearcase Oil Change:
Every 12 months or 200 hours.
Engine Oil:
SAE 5W-50 Synthetic Motorcycle/ATV Oil
Coolant:
Ethylene Glycol based antifreeze, 50/50 mix with distilled water (e.g., Polaris Coolant)
Brake Fluid:
DOT 4 Hydraulic Brake Fluid
Grease:
Lithium-based multipurpose grease
Pvp Belt Wear:
Early wear or breakage of the primary drive belt can occur with aggressive riding or improper maintenance.
Charging System Issues:
Stator or regulator/rectifier failures can lead to battery charging problems.
Sus Suspension Component Wear:
Bushings and ball joints in the suspension can wear over time, requiring replacement for proper alignment and handling.
Efi Sensor Failures:
Sensors like the throttle position sensor (TPS) or coolant temperature sensor can fail, impacting engine performance.
Manufacturer:
Polaris Industries Inc., established in 1954, a leading manufacturer of powersports vehicles.
Lineage:
The Sportsman line has been a cornerstone of Polaris's ATV offerings, known for its utility and comfort.
800Cc Introduction:
The 800cc engine platform was a significant upgrade, providing a substantial power increase over previous 700cc models.
Touring Variant:
The 'Touring' designation signifies a focus on rider and passenger comfort, often including enhanced seating and ergonomics.
Production Period:
The 800 EFI engine was a core offering for Polaris ATVs from the mid-2000s through the early 2010s.