Segment:
High-performance mountain/trail crossover snowmobile
Target User:
Riders seeking capability in varied snow conditions, including off-trail and steep ascents
Key Competitors:
Ski-Doo Summit, Arctic Cat Mountain Cat, Polaris RMK (circa late 1990s)
Engine Type:
Powerful liquid-cooled 2-stroke twin-cylinder engine
Suspension Design:
Long-travel rear suspension optimized for bump absorption and climbing, often featuring a ProAction Plus or similar design
Track Length:
Typically longer track lengths (e.g., 136 inches or more) for improved flotation and traction in deep snow
Clutching:
Performance-oriented clutching for optimal power delivery across a range of conditions
Chassis Design:
Lightweight chassis for improved maneuverability
Engine Assembly:
Cylinder, piston, crankshaft, connecting rods, lubrication system, cooling system, fuel delivery system (carburetors), exhaust system components
Drive Train:
Primary clutch assembly, secondary clutch assembly, drive belt, chaincase components (gears, sprockets, chain), driveshaft, track assembly components
Suspension:
Front suspension components (shocks, A-arms, skis, carbides), rear suspension components (bogies, springs, shocks, rails), idler wheels, torque arm components
Chassis And Body:
Frame components, tunnel, body panels (hood, side panels), seat assembly, handlebars, controls, windshield, storage compartments
Electrical:
Ignition system components (CDI, ignition coil, spark plugs), lighting system (headlight, taillight, brake light), starter motor, battery, wiring harness components
Fuel System:
Fuel tank, fuel lines, fuel filter, carburetor components (jets, needles, floats, diaphragms), oil injection system components
Braking System:
Brake caliper, brake disc, brake pads, brake lever, brake cable/line
Part Identification:
Identification of all individual parts with corresponding OEM part numbers for ordering and replacement
Assembly Disassembly:
Visual guidance through exploded diagrams to understand the order of assembly and disassembly for various components
Component Breakdown:
Detailed breakdown of complex assemblies like clutches, suspension units, and engine components into their constituent parts
Depth:
Highly detailed, focusing on specific part identification and relationships within assemblies
Diagnostic Aid:
Indirectly aids diagnostics by identifying correct parts for replacement of faulty components
Rebuild Focus:
Essential for rebuilding or replacing specific components accurately
Type:
PDF (Portable Document Format)
Searchability:
Likely text-searchable, allowing quick finding of part numbers and descriptions
Diagram Clarity:
Professional quality, designed for clarity of exploded diagrams and part identification
Text Legibility:
High legibility for part numbers, descriptions, and any accompanying text
Binding:
Not applicable (downloadable PDF)
Paper:
Not applicable (downloadable PDF)
Engine Type:
Liquid-cooled, 2-stroke, reed valve, parallel twin
Bore X Stroke:
73 mm x 82 mm (typical for this era engine)
Carburetion:
Dual Mikuni VM34 or similar
Ignition:
CDI (Capacitor Discharge Ignition)
Lubrication:
Yamaha Accu-Mix (Autolube) oil injection system
Horsepower Estimate:
Approximately 95-105 hp (varies with tuning and specific configuration)
Torque Estimate:
Estimated peak torque around 70-75 ft-lbs
Fuel Type:
Unleaded gasoline (typically 87 octane or higher)
Oil Type:
Yamaha Genuine 2-stroke injector oil (or equivalent API-TC rated oil)
Type:
CVT (Continuously Variable Transmission) with Yamaha's own clutching system (e.g., Y.V.X.R. system)
Gear Reduction:
Integrated into the chaincase
Optional Gearing:
Not typically offered as an option, standard gearing optimized for mountain riding
Clutch Engagement:
Adjustable for different riding styles and elevations
Chaincase Oil:
Yamalube Gear Oil SAE 75W-90 (or equivalent)
Overall Length:
Approximately 118-125 inches (varies with track length and bumper configurations)
Overall Width:
Approximately 46-48 inches
Track Width:
Typically 15 inches
Track Length:
Commonly 136 inches
Track Lug Height:
Often 1.5 inches or higher for mountain capability
Dry Weight Estimate:
Approximately 450-470 lbs
Fuel Capacity:
Approximately 9.5-10 gallons
Crash Test Results:
Not applicable (snowmobiles are not typically crash-tested by NHTSA or equivalent bodies)
Braking System:
Hydraulic disc brake for reliable stopping power
Kill Switch:
Standard handlebar-mounted kill switch for immediate engine shutdown
Lighting:
Headlight, taillight, and brake light for visibility
Seatbelt Anchorage:
Not applicable (snowmobiles do not utilize seatbelts)
Dashboard Display:
Basic analog gauges for speedometer, tachometer, engine temperature, and fuel level. May include indicator lights for oil, engine, and lights.
Engine Management:
CDI ignition with limited electronic engine management. Focus on mechanical reliability.
Connectivity Features:
None (no integrated Bluetooth, GPS, or smartphone connectivity).
Oil Change Chaincase:
Recommended every 100-150 hours of operation or annually.
Spark Plug Replacement:
Inspect every 50 hours, replace as needed, typically annually or every 100 hours depending on usage and plug type.
Drive Belt Inspection:
Inspect every 20-30 hours of operation for wear, cracking, and proper tension.
Clutch Cleaning And Inspection:
Recommended annually or every 50-100 hours to ensure proper operation and longevity.
Track Tension Adjustment:
Check and adjust every 50 hours or as needed based on riding conditions.
Chaincase Oil Spec:
Yamalube Gear Oil SAE 75W-90 (or equivalent GL-4 specification)
Coolant Type:
Permanent type antifreeze (ethylene glycol based) with corrosion inhibitors, mixed 50/50 with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (refer to specific manual for exact recommendation).
Clutch Wear:
As with many CVT systems of this era, clutch wear (buttons, weights, ramps) is common and can affect performance. Proper maintenance is key.
Suspension Bushings:
Wear in suspension bushings and pivot points can lead to play and affect handling, especially after high mileage.
Carburetor Adjustment:
Carburetors may require periodic cleaning and adjustment due to fuel quality or altitude changes. Mikuni VM series are generally reliable but require proper tuning.
Silicone Seals:
Older snowmobiles can develop leaks in silicone sealing areas, especially around the exhaust and engine mounts. Regular inspection is recommended.
Track Hyfax Wear:
Wear on hyfax (plastic runners under the track) is a normal maintenance item, especially in abrasive conditions.
Heritage Summary:
Yamaha has a long-standing reputation for building reliable and performance-oriented snowmobiles, particularly in the mountain and performance trail segments. Known for innovative technologies and robust engineering.
Lineage:
The Mountain Max series evolved from Yamaha's earlier performance-oriented models, focusing on enhanced deep snow capability and power. Successors often featured technological advancements like different suspension designs and engine configurations.
Key Innovations:
Introduction of more powerful engines, longer tracks, and improved rear suspension systems to tackle challenging mountain terrain.
Production Era:
Mid to late 1990s (specifically the 700cc models)
Manufacturing Location:
Likely manufactured in Japan or North America by Yamaha Motor Corporation.
Industry Reviews:
While specific awards for this exact model are hard to pinpoint, Yamaha's Mountain Max line generally received positive reviews for its powerful engine and mountain-climbing capabilities in the late 90s, often lauded for its reliability compared to some competitors.
Consumer Satisfaction:
Yamaha snowmobiles from this era are often recognized for their durability and customer satisfaction, contributing to their value in the used market.
