The 2008 Polaris RMK Shift 155 is a snowmobile engineered for mountain riding, featuring the Pro-Ride Chassis and a Polaris Liberty 600 Cleanfire Engine. This model, with its 155-inch track and aggressive lug pattern, was designed to offer agility and superior performance in deep snow conditions, competing in the 600cc class with other leading manufacturers. Its lightweight design and advanced suspension systems, including RydeFX Shocks, underscore Polaris's commitment to delivering a capable and reliable snowmobile for challenging terrain. This comprehensive workshop repair service manual provides detailed information for the service, maintenance, and repair of the 2008 Polaris RMK Shift 155 snowmobile. It covers essential areas such as engine overhaul, drivetrain systems, chassis and suspension, and electrical systems, offering step-by-step procedures, troubleshooting guides, and technical specifications. This manual is an invaluable resource for owners, mechanics, and technicians seeking to maintain the optimal performance and longevity of their vehicle. 🏷️ Basic Information Identification Make: Polaris Model: RMK Shift Year: 2008 Trim Level: Shift 155 Product Type: Snowmobile Codes Vin Code Prefix: 4P7 👋 Introduction Market Position Positioning: The Polaris 600 RMK Shift 155 was positioned as a capable mountain sled for the 2008 season, emphasizing its agility and powder performance in its class. Competitive Analysis Competitors: Competed directly with mountain-specific models from Ski-Doo (Summit series), Yamaha (Phazer MTX), and Arctic Cat (M Series) in the 600cc class. Key Features Features: Pro-Ride Chassis (introduced for 2008), Polaris Liberty 600 Cleanfire Engine, RydeFX Shocks, 155-inch track with aggressive lug pattern, quick-release track system (on some configurations), lightweight design. 📋 Manual Details Coverage Areas Primary Coverage: Service, Maintenance, Repair, Troubleshooting Secondary Coverage: Diagnostics, Electrical System, Engine Overhaul, Suspension, Tracks Page Count Estimated Pages: 800+ Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Engine assembly/disassembly, lubrication, cooling, fuel system, ignition system, exhaust system, starting system, charging system, engine diagnostics. Drivetrain Systems: CVT (Continuously Variable Transmission) clutch tuning and service, chaincase, drive axle, driven axle, snowmobile track maintenance and replacement. Chassis Systems: Front suspension geometry and alignment, rear suspension calibration and repair, steering system, skis, brake system, controls (throttle, brakes, reverse). Electrical Systems: Wiring diagrams, component testing, lighting, battery maintenance, sensor diagnostics, ECU (Engine Control Unit) troubleshooting. Bodywork And Plastics: Panel removal and installation, decal placement, seat service, storage compartment access. Procedures Included Maintenance Procedures: Routine checks, lubrication points, belt inspection, spark plug replacement, air filter service, coolant checks, track tension adjustment. Repair Procedures: Engine rebuilds, clutch replacement, suspension component repair, brake caliper service, steering linkage replacement, electrical component repair. Troubleshooting Guides: Step-by-step diagnostics for common and uncommon performance issues, error code interpretation, no-start conditions, poor running symptoms. Technical Specifications: Torque specifications for all fasteners, electrical resistance values, compression test parameters, fluid capacities, gear ratios. Technical Depth Depth: Comprehensive, suitable for professional technicians and experienced DIY enthusiasts. Covers detailed disassembly and reassembly steps. 📊 Manual Specifications File Format Format: PDF Searchable Text: Yes Print Quality Quality: High-resolution, clear diagrams and text. Binding Type Type: N/A (Digital PDF) Paper Type Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, liquid-cooled, Liberty 600 Cleanfire Displacement: 599cc Bore X Stroke: 73.9 mm x 72 mm Horsepower Estimate: Approximately 115-125 HP (stock, unverified without exact manual spec) Compression Ratio: 7.2:1 (typical for this era Cleanfire) Performance Ignition System: CDI (Capacitor Discharge Ignition) with advance timing Exhaust System: Engage Exhaust System with silencing and performance tuning Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) with individual throttle bodies (ITBs) Recommended Fuel: 87-octane unleaded gasoline (verify with manual for precise spec) Oil Injection: Automatic Oil Injection (API-TC or ISO-L-EGD certified 2-stroke oil) 🔧 Transmission Standard Type: Polaris P-85 Primary Clutch & Arctic (AA) Drive Clutch (P-85 and Arctic Cat drives are common interchange or similar design) Secondary Clutch: Polaris TEAM Driven Clutch (or similar model) Features Clutch Tuning: Adjustable weights and helix for rider preference and snow conditions. Gear Reduction: Chaincase with single-speed reduction (specific ratios detailed in manual). 📐 Dimensions Exterior Track Length: 155 inches Track Width: 15 inches Lug Height: 2.25 inches (typical for RMK models) Weights Dry Weight Estimate: Approx. 420-440 lbs (unverified without exact manual spec) Fuel Capacity: 10.2 gallons 🛡️ Safety Features Ratings General Safety: Adherence to operating procedures outlined in the manual is crucial for safe operation. Follow all warnings and precautions. Active Features Braking System: Hydraulic disc brake with braided stainless steel lines (typical for performance models). Passive Features Rollover Protection: No specific rollover protection structure, emphasis on rider skill and terrain awareness. Lighting: Halogen headlights for visibility, LED taillight. 💡 Technology Features Infotainment Display Panel: Digital/analog instrument cluster with speedometer, tachometer, odometer, trip meter, fuel level, and indicator lights. Driver Assistance Features: N/A (Snowmobiles of this era do not typically feature electronic driver assistance systems beyond basic engine management)....