Market Position:
The Yamaha Exciter II was positioned as a versatile trail and recreational snowmobile, known for its balanced performance and reliability within its class during the early 1990s.
Target Audience:
Intended for Yamaha Exciter II owners, DIY mechanics, and snowmobile enthusiasts who perform their own maintenance and repairs.
Competitive Analysis:
Competed with other performance-oriented 500cc class snowmobiles from manufacturers like Ski-Doo, Arctic Cat, and Polaris, offering a blend of power and handling for trail riding.
Key Features:
The Exciter II series was recognized for its capable twin-cylinder engine, comfortable seating, and responsive suspension for its era, making it a popular choice for general trail use.
Coverage Areas:
1991 Yamaha EX570 Exciter II, 1992 Yamaha EX570 Exciter II, 1993 Yamaha EX570 Exciter II
Page Count:
Not specified in product information, but typically extensive for a full service manual.
Manual Type:
Downloadable PDF Repair/Service Manual, potentially including Owner's Manual and Parts Catalog information.
Language:
English (Implied by product description and target market)
Systems Covered:
General Information, Routine Maintenance, Engine Removal and Installation, Fuel System, Lubrication and Cooling System, Engine Specifications, Transmission, Drive Chain & Sprockets, Steering System, Shocks, Body Work, Intake & Exhaust, Electrical System, Advanced Troubleshooting
Intake Exhaust System:
Detailed procedures for inspection, cleaning, and potential repair of the intake system (airbox, reed valves) and exhaust system (pipe, muffler).
Electrical System:
Covers ignition system, lighting, starter motor, battery charging system (stator, rectifier/regulator), and troubleshooting of electrical faults. Wiring diagrams are typically included.
Body Work:
Includes procedures for removing and installing body panels, seat, handlebars, and other cosmetic and functional body components.
Steering System:
Covers steering linkage, ski alignment, handlebar components, and potential wear points in the steering system.
Shocks Suspension:
Information on front and rear suspension components, including shock absorber service, spring preload adjustments, and lubrication points.
Procedures Included:
Repair procedures, service information, parts lookup, routine maintenance, advanced diagnostics, component installation and removal.
Troubleshooting Procedures:
Advanced troubleshooting section will guide users through diagnosing common performance issues, starting problems, and system malfunctions, often with flowcharts or symptom-based guides.
Engine Rebuild Procedures:
Likely includes detailed instructions for engine disassembly, inspection of internal components (pistons, rings, crankshaft, bearings), cylinder honing, and reassembly.
Technical Depth:
Comprehensive, covering basic to advanced repair and maintenance.
Technical Depth Specifics:
Covers specifications for critical engine clearances, torque values for fasteners, ignition timing, carburetor settings, and suspension adjustments.
File Format:
PDF (Plain, simple, easy to use, no zip files)
File Accessibility:
Instant download after payment, designed for immediate use without additional software like zip extractors.
Print Quality:
Assumed to be high-quality for clear printing of diagrams and text.
Binding Type:
N/A (Digital download)
Paper Type:
N/A (Digital download)
Engine Type:
Two-stroke, liquid-cooled, parallel-twin
Engine Displacement:
561cc (570cc often used as a marketing designation)
Horsepower Estimate:
Approximately 70-75 HP (exact figures vary by year and tuning, but this is a typical range for this engine size and era).
Torque Estimate:
Estimated around 50-55 ft-lbs, providing good mid-range power for trail riding.
Carburetor Adjustment:
Details on idle speed adjustment, mixture screw settings, and synchronization of dual carburetors.
Carburetor Setup:
Dual Mikuni VM34SS or similar downdraft carburetors (specific size to be confirmed in manual).
Fuel Type:
Unleaded gasoline (typically 87 octane or higher, specified in manual).
Lubrication System:
Oil injection system with automatic mixing of oil and fuel.
Cooling Type:
Liquid-cooled.
Bore Stroke:
Likely around 73mm bore x 67mm stroke, to achieve the 561cc displacement. Exact figures within the manual.
Transmission Type:
Automatic Continuously Variable Transmission (CVT) system with forward, neutral, and reverse gears.
Drive Clutch:
Yamaha "Drive" Clutch (Primary)
Driven Clutch:
Yamaha "Driven" Clutch (Secondary)
Drive Chain Sprockets:
Covered in manual, includes chain adjustment and sprocket wear inspection.
Chaincase Lubrication:
Instructions on checking and topping off the chaincase lubricant level and replacement procedures.
Infotainment Features:
Basic instrumentation including speedometer, tachometer, odometer, engine temperature warning light, and oil level warning light. No advanced infotainment systems typical of modern vehicles.
Driver Assistance Features:
No electronic driver assistance features. Operation relies on rider skill and mechanical systems.
Connectivity Features:
N/A
Service Intervals General:
Manual covers routine maintenance, which would include intervals for spark plug replacement, chain adjustment, lubrication, and clutch inspection. Specific intervals detailed within the manual.
Spark Plug Service:
Recommended spark plug inspection and replacement intervals, along with correct spark plug type and gap specifications (e.g., NGK BR9ES or similar).
Clutch Maintenance:
Guidance on clutch maintenance, including belt inspection/replacement, roller inspection, and proper alignment of primary and secondary clutches.
Engine Oil Type:
Two-stroke synthetic or semi-synthetic oil, specifically formulated for liquid-cooled, high-performance snowmobile engines. Manufacturer-recommended oil grades (e.g., API TC or JASO FD) will be specified in the manual.
Coolant Type:
Ethylene glycol-based antifreeze/coolant mixture with corrosion inhibitors, typically a 50/50 mix with distilled water for optimal freeze protection and cooling performance. Specific type and capacity will be in the manual.
Gearcase Oil Type:
Yamaha specifies a specific gear oil for the chaincase/gearbox. This is typically a GL-4 or GL-5 rated synthetic gear oil. Specific viscosity and Yamaha part number will be in the manual.
Known Issues Common:
Common issues for this era of snowmobiles can include wear on CVT clutches, carburetor jetting issues due to fuel changes, exhaust pipe leaks, and potential wear in the steering components. The manual will provide diagnostic procedures for these.
Known Issues Maintenance Tips:
Regular cleaning of cooling system fins, checking track tension, and proper spark plug maintenance are crucial. Proper storage practices in the off-season are also vital.
Brand Heritage:
Yamaha has a long-standing reputation in the powersports industry, known for its innovation in engine design, reliability, and performance across motorcycles, ATVs, and snowmobiles.
Model Evolution:
The Exciter II (EX570) was an evolution of Yamaha's earlier Exciter models, refining performance, handling, and rider comfort for the early 1990s market. It built upon the success of previous 500cc class Yamahas.
Production Period:
The EX570 Exciter II was produced for the 1991, 1992, and 1993 model years.
Manufacturing Location:
Yamaha snowmobiles were typically manufactured in North America (Canada or USA) or Japan during this period.
