🏷️ Basic Information Identification Make: Polaris Model: Indy 400 (133 SKS) Year: 1987 Product Type: Snowmobile Service & Shop Repair Manual Product Format: PDF Download Codes Vin Structure: N/A for snowmobiles in this era (often serial number based) 👋 Introduction Market Position Target User: Polaris Indy 400 (133 SKS) owners and independent repair shops. Purpose: To provide comprehensive guidance for maintaining, troubleshooting, and repairing the specified snowmobile model. Competitive Analysis Value Proposition: Offers factory-level technical knowledge at an accessible price, enabling self-sufficiency in repairs. Alternative Sources: Dealership service departments, generic repair guides (often less detailed). Key Features Features: Step-by-step instructions, hundreds of pages, detailed illustrations, troubleshooting guides, searchable PDF. Customer Service: Guaranteed quality and customer satisfaction from the vendor (JohnsManuals.com). 📋 Manual Details Coverage Areas Primary Coverage: 1987 Polaris Indy 400 (133 SKS) Secondary Coverage: Potentially related Indy models with shared components, though specific coverage is for the 133 SKS variant. Page Count Estimated Pages: Hundreds (exact count not specified, but described as 'hundreds of pages') File Size: Approximately 100MB Manual Type Type: Factory Service Repair Manual / Shop Manual Language Language: English Format Delivery Method: Instant Download via TXT file link to PDF 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, and troubleshooting for the 400cc class engine. Fuel System: Carburetor adjustment, cleaning, and overhaul; fuel pump operation and service. Ignition System: CDI unit, ignition coil, spark plug service, timing adjustments. Cooling System: Liquid-cooled system maintenance, coolant replacement, pump service. Drivetrain: Clutch operation (drive and driven), belt inspection and replacement, chain case maintenance, chain adjustment. Suspension: Front and rear suspension component inspection, lubrication, shock absorber service, spring adjustment. Brakes: Brake system inspection, hydraulic fluid replacement, caliper and master cylinder service. Electrical System: Wiring diagrams, lighting system maintenance, starter system service, battery care. Bodywork And Chassis: Tunnel inspection, seat removal/installation, plastic body panel maintenance, ski and track inspection. Steering: Handlebar and steering post maintenance, tie rod inspection, ski alignment. Procedures Included Maintenance: Regular scheduled maintenance, lubrication points, cleaning procedures, pre-ride inspections. Troubleshooting: Diagnosis of common and uncommon performance issues, systematic problem-solving guides for various systems. Repair: Step-by-step instructions for component removal, repair, and reinstallation for all major systems. Overhaul: Complete engine rebuild procedures, transmission component overhauls, clutch rebuilding. Adjustments: Carburetor jetting and adjustments, clutch engagement and disengagement settings, chain tension, brake adjustments. Special Tools: Identification and usage of specialized tools required for specific repair or maintenance tasks. Technical Depth Level: Comprehensive (from basic oil changes to major component overhauls). Detail Level: Factory-level detail with 'every nut and bolt' coverage. Illustrations: Numerous illustrations and diagrams to aid in understanding procedures. Searchability: Searchable PDF functionality for quick access to information. Printability: Individual pages can be printed as needed. 📊 Manual Specifications File Format Format: Portable Document Format (PDF) Quality: High quality (implied by 'great quality service manual', size suggests detailed scans or original digital formatting) Text Recognition: Likely OCR-enabled for search functionality, as described. Print Quality Printability Notes: Designed for home or shop printing of specific sections. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, piston-port induction Displacement: Approximately 399cc (400cc class) Cylinders: Single Cylinder Cooling System: Liquid-cooled Bore X Stroke: Specifics to be detailed in manual, typically around 72mm x 70mm for this class of engine. Compression Ratio: To be specified in manual, likely around 6.5:1 to 7.5:1 for 1980s 2-stroke snowmobiles. Performance Horsepower: Estimated 35-45 HP (specific rating in manual). Torque: Estimated 30-38 ft-lbs (specific rating in manual). Fuel System Carburetor Type: Single Mikuni VM or similar (specific model in manual). Fuel Type: Unleaded gasoline (likely 87-89 octane) mixed with 2-stroke oil. Oil Mixture: Specific oil-to-gas ratio (e.g., 40:1 or 50:1) detailed in manual. 🔧 Transmission Standard Type: CVT (Continuously Variable Transmission) with Polaris P-85 Drive Clutch and MM90 Driven Clutch (or similar factory designations). Drive Clutch: Polaris P-85 (or equivalent for the era). Driven Clutch: Polaris MM90 (or equivalent for the era). Optional Optional Transmissions: N/A for this model; CVT was standard. Features Belt Drive: Reinforced drive belt, with specifications and replacement intervals in the manual. Gear Reduction: Internal gear reduction within the chaincase. 📐 Dimensions Exterior Length: Specific dimensions to be detailed in manual, typically around 95-105 inches for this class. Width: Specific dimensions to be detailed in manual, typically around 35-40 inches. Height: Specific dimensions to be detailed in manual, typically around 45-50 inches. Weights Dry Weight: Estimated 450-500 lbs (specific weight in manual). Ski Stance: Specific ski stance in manual, crucial for handling characteristics. Cargo Cargo Capacity: Limited, usually small rack or under-seat storage, details in manual. 🛡️ Safety Features Ratings Safety Standards: Adherence to then-current snowmobile safety regulations, detailed in manual's safety section. Active Features Throttle Safety: Self-returning throttle lever, emergency shut-off tether (kill switch). Braking System: Hydraulically activated...