Market Segment:
Trail and recreational snowmobiling.
Key Competitors:
Arctic Cat, Yamaha, Ski-Doo of the era.
Vehicle Type:
Two-stroke, fan-cooled snowmobile.
Engine:
Detailed breakdown, overhaul, tuning, and component identification.
Fuel System:
Carburetor adjustment, fuel pump, fuel lines, and tank service.
Ignition System:
CDI unit, spark plugs, coil testing, and timing adjustments.
Cooling System:
Radiator, fan, hoses, and coolant specifications.
Drive System:
Clutch inspection, adjustment, belt replacement, and drive train maintenance.
Suspension:
Front and rear suspension components, shock absorbers, and bushings.
Braking System:
Brake caliper service, pad replacement, fluid flush, and disc inspection.
Electrical System:
Wiring diagrams, lighting, battery service, and component testing.
Chassis And Body:
Frame inspection, body panel removal and installation, seat service.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, lubrication points.
Troubleshooting:
Diagnostic flowcharts for common starting, running, and performance issues.
Engine Overhaul:
Complete engine disassembly, inspection, and reassembly procedures.
Carburetor Rebuild:
Step-by-step instructions for carburetor disassembly, cleaning, and reassembly.
Clutch Service:
Primary and secondary clutch maintenance and replacement.
Brake System Repair:
Detailed instructions for hydraulic brake system servicing.
Electrical Component Testing:
Methods for testing ignition coils, stator, and other electrical components.
Suspension Adjustment:
Instructions for adjusting and repairing suspension components.
Depth Of Coverage:
Advanced diagnostics, complete engine rebuilds, transmission overhauls, and detailed electrical troubleshooting.
Engine Type:
Two-stroke, piston-ported, reed valve induction.
Engine Displacement:
Approximately 399cc (specific details vary by sub-model, but 400 designation is primary).
Horsepower Estimated:
Around 35-45 HP (typical for this class and era).
Torque Estimated:
Torque figures not readily available, but designed for mid-range power delivery.
Carburetor Configuration:
Likely a single Mikuni VM or similar carburetor, size around 34-36mm.
Cooling Method:
Fan-cooled.
Clutch Inspection:
Inspect annually or every 1000 miles/hours of operation.
Spark Plug Replacement:
Inspect every 1000 miles, replace as needed or every 2000 miles.
Drive Belt Inspection:
Inspect for wear and damage before each season, replace based on wear.
2 Stroke Oil Type:
API-TC certified, JASO FD/FB rated synthetic or semi-synthetic 2-stroke oil.
Coolant Type:
Ethylene glycol-based antifreeze coolant, mixed 50/50 with distilled water.
Carburetor Fouling:
Common issue in older snowmobiles due to fuel quality and storage; requires cleaning/rebuilding.
Clutch Wear:
Wear on clutch buttons, rollers, and belt can affect performance.
Suspension Bushings:
Degradation of rubber bushings can lead to play and poor handling.
Polaristracking:
Polaris Industries has a long history in snowmobile manufacturing, dating back to the mid-1950s.
1980S Lineup:
The 1980s saw Polaris innovate with engine designs, suspension systems, and chassis configurations.
Manufacturing Location:
United States (Roseau, Minnesota and other facilities).
