Segment:
Mid-size utility ATV segment, known for its versatility and value.
Competitors:
Competes with models from Yamaha (Grizzly 350/450), Can-Am (Outlander 400/500), Honda (Foreman/Rancher 420), Kawasaki (Brute Force 300/400).
Features:
Polaris's signature independent rear suspension (IRS), reliable engine, robust chassis, and user-friendly controls.
Engine:
Complete engine overhauls, diagnostics, component testing, and specifications.
Transmission:
PVT (Polaris Variable Transmission) system, clutch inspection and adjustment, belt replacement.
Drivetrain:
All-wheel drive (AWD) system, front differential, rear differential, driveshafts, U-joints.
Suspension:
Front and rear suspension systems, shock absorbers, A-arms, bushings, wheel bearings.
Brakes:
Hydraulic brake system, front and rear calipers, master cylinder, brake lines, brake fluid specifications and bleeding procedures.
Electrical:
Starter system, charging system, battery, ignition system, lighting, switches, fuses, wiring diagrams, diagnostics.
Fuel System:
Fuel pump, fuel filter, fuel lines, carburetor (if applicable) or fuel injection system, fuel tank inspection.
Cooling System:
Radiator, fan, coolant specifications, hoses, thermostat, water pump.
Steering:
Steering column, tie rods, steering linkage, component inspection and adjustment.
Bodywork:
Body panel removal and installation, plastics, seat, handlebars, rack systems.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication points, bolt torque specifications.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting guides.
Repair:
Step-by-step repair instructions for all major systems, including disassembly, assembly, and component replacement.
Diagnostics:
Detailed diagnostic procedures for electrical and mechanical systems.
Specifications:
Torque specifications, clearances, fluid capacities, electrical values, engine performance data.
Wiring Diagrams:
Comprehensive electrical wiring diagrams for all circuits.
Depth:
Comprehensive coverage for both routine maintenance and in-depth repairs and overhauls.
Engine Type:
4-Stroke, SOHC, 4-Valve
Bore X Stroke:
85 mm x 66 mm
Cooling System:
Liquid-Cooled
Horsepower:
Approx. 29 HP (Horsepower, specific rating may vary slightly)
Torque:
Torque specifications would be detailed in the manual.
Fuel Delivery:
Electronic Fuel Injection (EFI) for the 'HO' models, but 2012 400 HO used carburetor.
Carburetor Type:
Keihin CVK-34 (likely, specific model to be confirmed in manual)
Ignition System:
Electronic Ignition
Transmission Type:
Polaris Variable Transmission (PVT) Automatic with Engine Braking
Gear Selection:
High (H), Low (L), Neutral (N), Reverse (R), Park (P)
Transmission Fluid:
Polaris AGL Synthetic Gearcase Lubricant (or equivalent)
Clutch Type:
Sealed On-Demand ATV AWD (Active Descent Control, though ADC is typically found on higher models, it might refer to AWD engagement logic)
Infotainment System:
Basic instrumentation: speedometer, odometer, trip meter, tachometer, fuel gauge, gear indicator, AWD indicator, engine hour meter.
Traction Control:
On-Demand AWD system provides enhanced traction.
Diagnostic Ports:
Diagnostic ports for connecting to Polaris diagnostic tools (specific type detailed in manual).
Oil Change Interval:
Refer to the manual for specific intervals (typically every 100 hours or annually).
Clutch Belt Inspection:
Regular inspection and replacement as needed, often recommended at 1500 miles or 2400 hours, but dependent on usage.
Air Filter Cleaning:
Frequent cleaning or replacement recommended, especially in dusty conditions.
Engine Oil Type:
Polaris Synthetic 2W-50 (or specified SAE 5W-50, API CI-4)
Engine Oil Capacity:
Approximately 2.0 L (2.1 US qt) with filter change.
Coolant Type:
Ethylene Glycol-based antifreeze (50/50 mix with distilled water)
Brake Fluid Type:
DOT 4 Hydraulic Brake Fluid
Common Wear Items:
Tie rod ends, wheel bearings, suspension bushings, brake pads, and the PVT belt are common wear items requiring periodic inspection and replacement.
Charging System:
While generally reliable, stator or voltage regulator issues can occur over time, detailed diagnostic steps are in the manual.
Manufacturer:
Polaris Industries, founded in 1954, a leading manufacturer of powersports vehicles.
Sportsman Line:
The Sportsman line is Polaris's flagship ATV series, known for its comfort, capability, and utility. The 400 HO model has been a consistent performer in the mid-size utility segment.
Manufacturing Location:
Typically manufactured in Polaris facilities in the USA.
