Positioning:
A vital resource for owners and independent repair shops of the 1987 Polaris Indy Trail (ES/133 SKS) snowmobile, providing factory-level repair and maintenance information.
Value Proposition:
Offers dealership-level expertise and detailed procedures that are often difficult to find for vintage snowmobiles, enabling owners to perform repairs themselves, saving time and money.
Content Advantage:
Hundreds of pages with detailed explanations, hundreds of illustrations, and step-by-step instructions covering virtually every aspect of the vehicle.
Usability:
Easy-to-read text and search functionality enhance the user experience for efficient problem diagnosis and repair.
Primary Focus:
Service, Repair, Maintenance
Included Models:
1987 Polaris Indy Trail (ES), 1987 Polaris Indy Trail (133 SKS)
Estimated Pages:
Approx. 400-500 pages (based on typical factory service manuals of this era and the description)
Type:
Factory Service Manual / Shop Manual
Powertrain:
Engine overhaul, fuel system, exhaust system, ignition system, cooling system (liquid/air), lubrication system
Drivetrain:
Drive clutch, driven clutch (P-85/Magnum), chaincase, track drive, reverse (if applicable)
Suspension:
Front suspension (IFS/Struts), rear suspension (skid frame, shocks, springs, torque arms), ski and spindle assembly
Electrical:
Stator, lighting system, ignition system, CDI unit, wiring diagrams, battery maintenance
Chassis And Body:
Frame inspection, body panel removal/installation, handlebars, controls, seat, windshield
Maintenance:
Scheduled maintenance checks, lubrication points, belt inspection/replacement, spark plug service, air filter cleaning/replacement
Diagnostics:
Troubleshooting guides for common performance issues, starting problems, overheating, electrical faults
Repair:
Engine rebuilds, clutch alignment and servicing, suspension component replacement, brake system repair, carburetor adjustment/rebuild
Technical Data:
Specifications for tolerances, torques, fluid types, electrical resistance, fuel mixtures
Depth:
Comprehensive from basic maintenance to full engine and drivetrain overhauls, including electrical diagnostics and troubleshooting
Format:
PDF (Portable Document Format)
Quality:
High-resolution scans of original factory manual pages, enabling clear text and legible illustrations.
Binding:
Digital (downloadable PDF). Implies print-on-demand capability for users.
Paper Type:
N/A (Digital Format)
Searchability:
Fully searchable text for quick access to specific topics and procedures.
Printable:
Pages are printable, allowing users to create a physical copy for workshop use.
Type:
Typically a liquid-cooled, 2-stroke twin-cylinder engine (specific displacement varies by exact Indy Trail sub-model).
Displacement Range:
Likely in the 340cc to 500cc range for the Indy Trail series of that era (e.g., Fuji-Polaris engines).
Horsepower Estimate:
Estimated 40-60 HP, depending on specific engine configuration and tuning.
Carburetion:
Dual Mikuni VM series carburetors (common for this era and engine size, e.g., VM34)
System:
CDI (Capacitor Discharge Ignition) system, typically with electronic advance.
Type:
Liquid-cooled (for 'ES' designation indicating potential for liquid cooling, though some Indy Trails were fan-cooled).
Type:
CVT (Continuously Variable Transmission) utilizing Polaris' P-85 primary clutch and a Magnum (or similar) driven clutch.
Gearing:
Chaincase with single-speed reduction. Reverse gear may be present depending on specific model configuration.
Clutch Service:
Detailed procedures for clutch calibration, maintenance, and replacement of weights, springs, and helix.
Classification:
Snowmobile safety standards of the era, focusing on structural integrity, braking performance, and operator control.
Braking:
Hydraulic disc brake system (typically rear track brake).
Controls:
Handlebar steering, throttle lever, brake lever, kill switch.
Oil Change:
Not applicable for 2-stroke pre-mix or oil injection systems. Refer to manual for injection pump checks and oil levels.
Clutch Inspection:
Recommended annually or every 1000 miles (whichever comes first) for alignment, belt wear, and roller/sheave condition.
Spark Plugs:
Inspect and clean/gap every 1000 miles or as needed based on performance. Replacement as per manual recommendations.
Coolant:
Ethylene glycol-based antifreeze (50/50 mixture with distilled water) for liquid-cooled models. Manual will specify type and capacity.
Chaincase Oil:
Specific gear oil recommended by Polaris for the chaincase. Manual will list viscosity and capacity (e.g., SAE 80W-90 gear oil).
2 Stroke Oil:
High-quality synthetic or semi-synthetic 2-stroke snowmobile oil, typically mixed with fuel or used in an oil injection system. Manual will specify Polaris-approved oils.
Carburetor Issues:
Carburetor gumming due to fuel varnish, float level adjustments, pilot jet clogging, leading to poor idling or performance.
Clutch Wear:
Wear on clutch rollers, bushings, and drive belts leading to performance loss or belt breakage. Sheave wear is also common.
Suspension Bushings:
Wear in suspension pivot points and shock bushings, causing play and degraded handling.
Electrical Connections:
Corroded or loose electrical connectors, particularly in the lighting and ignition systems, can cause intermittent faults.
Manufacturer:
Polaris Industries, a long-standing American manufacturer known for snowmobiles, ATVs, and recreational vehicles.
Indy Series:
The Indy Trail was a popular model in Polaris' extensive Indy line, known for its versatility and comfort for trail riding.
Era:
Late 1980s, a period of significant development and competition in the snowmobile market.
Market Reputation:
Polaris Indy models of this era were generally well-regarded for their performance and comfort, contributing to Polaris' strong market presence.
Review Sources:
Historical snowmobile reviews and enthusiast forums would provide contemporary ratings and owner satisfaction feedback.
Standards:
Manufactured to meet applicable safety and emissions standards of the period.
