Genuine Yamaha Exciter 570 Snowmobile Service Manual (1987-1990)

Yamaha Exciter (82M) Service Manual - 1987-1988

This official technical publication establishes the baseline engineering standards for the maintenance and structural preservation of the Yamaha Exciter platform. Precision-engineered for the 82M series, the documentation integrates factory-validated tolerances with systematic troubleshooting protocols to ensure peak mechanical performance. A critical maintenance insight for these liquid-cooled powerplants is the mandatory replacement of all piston pin circlips during any top-end disassembly; reusing these high-tension components compromises engine integrity and frequently leads to catastrophic cylinder wall scoring.

Technical Applicability & Machine Identification

The following models are definitively covered by the technical specifications and diagnostic frameworks within this manual, all utilizing the 82M serial number prefix as the primary verification identifier:

Yamaha Exciter Series (569cc Liquid-Cooled)

• Yamaha Exciter (1987-1988)
• Yamaha Exciter L/C (1987-1988)
• Yamaha Exciter u/c (1987-1988)
• Yamaha Exciter L c (1987-1988)
• Yamaha Exciter/c (1987-1988)
• Yamaha Exciterv (1987-1988)

Asset Preservation & Operational ROI

• Component Longevity: Adherence to the factory-specified cylinder head torque sequences prevents thermal warping and ensures head gasket sealing under high-compression loads.
• Safety System Calibration: Detailed testing procedures for the Throttle Override System (TORS) ensure reliable fail-safe operation during extreme environmental conditions.
• Systematic Uptime: Implementing the exact "Oil Pump Air Bleeding" protocol following any fluid service prevents air-lock induced lubrication failure.

Document Metadata

• Document Type: Service/Workshop Manual
• Chassis Prefix: 82M (Starting 000101)
• Language: US English
• Page Count: 104

Technical Depth & Factory Benchmarks

System architecture validation is achieved through strict compliance with OEM tolerance thresholds. The engine specifications define a standard cylinder bore of 73.00–73.02 mm, with a critical wear limit of 73.5 mm (2.894 in). Ignition timing is hard-coded at 1.5 mm (0.06 in) BTDC to maintain thermal stability and combustion efficiency across the entire RPM range.

System Infrastructure & Schematic Navigation

The documentation utilizes a modular technical index, allowing for rapid isolation of sub-systems including the liquid-cooling circuit and the drive-train geometry. Precision routing diagrams for high-tension leads and fuel lines ensure that reassembly meets factory-exit standards, eliminating the risk of vibration-induced chaffing or circuit failure.

Table of Contents

• General Information: Machine Identification, Special Tools, Storage Protocols
• Periodic Inspections and Adjustments: Maintenance Schedules, Engine Tuning, Lubrication Points
• Engine Overhaul: Disassembly, Component Inspection, Crankshaft/Cylinder Benchmarks
• Cooling System: Coolant Replacement, Water Pump Service, Heat Exchanger Integrity
• Carburetion: Synchronization, High Altitude Jetting, Fuel Level Calibration
• Power Train: Primary/Secondary Sheave Adjustment, Drive Belt Wear Limits, Gearing
• Chassis: Ski Alignment, Steering Linkage, Track Tensioning and Alignment
• Electrical: Ignition System Testing, Lighting Circuits, Component Resistance Specs
• Appendices: Master Tightening Torques, General Specifications, Cable Routing Maps

Operational Limits & Specifications

• Coolant Mix: 60% Ethylene Glycol / 40% Soft Water (Total Capacity: 4.2 L).
• Drive V-Belt: New Width (31.6 mm) / Wear Limit (28.0 mm).
• Track Tension: 25.0–30.0 mm deflection at 10 kg (22 lb) central force.
• Torque Benchmarks: Spark Plugs (30 Nm), Cylinder Head (After initial run-in).
• Fluid Grades: YAMALUBE 2 (Engine); API GL-3 SAE #75 or #80 (Chain Case).