Segment:
Performance Trail/Mountain Snowmobiles
Competitors:
Arctic Cat Mountain Cat, Ski-Doo Summit, Polaris RMK
Vehicle Focus:
Yamaha's high-performance, liquid-cooled 2-stroke twin-cylinder snowmobiles known for their reliability and power.
Target Audience:
Enthusiast owners, independent repair shops, and technical service departments requiring accurate and complete repair information.
Powertrain:
Engine disassembly, assembly, inspection, tuning, lubrication, cooling, exhaust systems
Drivetrain:
Clutch (drive and driven), chaincase, track drive system, drive axle, suspension components
Electrical:
Ignition system, charging system, lighting, starter motor, wiring diagrams, sensors, troubleshooting
Chassis And Body:
Front and rear suspension geometry, steering system, braking system, hull and body panel removal/installation, ski and track components
Fuel System:
Carburetor specifications and adjustment, fuel pump, fuel lines, fuel tank
Exhaust System:
Exhaust pipe, muffler, and mounting hardware inspection and repair.
Maintenance:
Scheduled maintenance intervals, lubrication points, fluid checks and changes, filter replacements
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting, electrical diagnostics
Repair:
Step-by-step disassembly, repair, and reassembly of all major components and systems
Inspection:
Component inspection criteria, wear limits, torque specifications, alignment procedures
Wiring Diagrams:
Detailed electrical system wiring diagrams for all circuits, aiding in diagnosis and repair.
Torque Specifications:
Comprehensive list of torque specifications for all critical fasteners, ensuring proper assembly and component integrity.
Depth:
Comprehensive: Covers basic maintenance to full engine rebuilds and electrical system diagnostics.
Special Tools:
Lists required special tools and their part numbers for specific repair procedures.
PDF Quality:
High-resolution scans with clear text and diagrams, optimized for digital viewing and printing.
Searchability:
Fully text-searchable PDF allowing for quick access to specific topics.
Printability:
Designed for easy printing of specific sections or the entire manual.
Binding:
N/A (Digital PDF Download)
Paper:
N/A (Digital PDF Download)
Engine Type:
700cc Liquid-Cooled, 2-Stroke, Reed Valve, Twin-Cylinder
Bore X Stroke:
73.0 mm x 80.0 mm
Compression Ratio:
7.4 : 1
Horsepower:
~110-120 HP (Est. at crank, varies slightly by model/tuning)
Torque:
N/A (Specific values not readily published by Yamaha for this model year, focus on power delivery)
Carburetors:
Dual Mikuni VM38 (common, specific model variations may exist)
Ignition System:
CDI (Capacitor Discharge Ignition) with T.C.I. (Transistor Controlled Ignition)
Cooling Method:
Liquid Cooling
Oil Injection:
Autolube oil injection system
Clutch System:
CVT (Continuously Variable Transmission) with Yamaha's own clutch system (Primary: Dia-Clutch, Secondary: Torque Sensor Clutch)
Gear Reduction:
Chain drive with reduction gears in chaincase
Reverse:
Standard on ER and Venture models (manual engagement or electronic, depending on specific sub-model)
Chaincase Oil:
Yamalube 75W/90 Gear Oil (or equivalent SAE 80W/90 API GL-4)
Length:
Varies by model (approx. 110-120 inches)
Width:
Varies by model (approx. 46-48 inches)
Dry Weight:
Varies by model (approx. 480-530 lbs)
Fuel Capacity:
Approx. 10.4 US gallons
Front Suspension Travel:
Approx. 7-9 inches (e.g., Telescopic Struts, ProAction Plus front suspension)
Rear Suspension Travel:
Approx. 10-14 inches (e.g., Proraction RTX rear suspension, depending on specific sub-model)
Crash Testing:
N/A (Snowmobiles are not subjected to the same crash testing standards as automobiles)
Braking System:
Hydraulic disc brake (caliper type and rotor size may vary by sub-model)
Anti Seize:
Manual specifies proper use of anti-seize compound on critical fasteners to prevent seizing and ensure correct torque values.
Kill Switch:
Engine kill switch and tether cord (operator presence control) are standard safety features.
Gauge Cluster:
Digital/analog gauge cluster displaying speed, RPM, fuel level, coolant temperature, and indicator lights.
Engine Management:
Basic engine management with CDI and T.C.I. system. No advanced electronic driver aids.
N/A:
No modern connectivity features (e.g., Bluetooth, GPS) on this model.
Initial Break In:
Specific break-in procedures for new engines (e.g., varying RPM, avoiding prolonged idling) are detailed in the manual.
Spark Plugs:
Recommended replacement intervals (e.g., every 2,000-3,000 miles or annually, depending on usage and plug type).
Drive Belt:
Inspect drive belt for wear and damage at regular intervals (e.g., every 500-1000 miles). Replace as needed. Belt number is crucial (e.g., Yamaha OEM 8GK-17641-00-00 for some applications).
Chaincase Oil:
Change chaincase oil annually or every 1,000-1,500 miles.
Coolant:
Yamaha Supercoolant (or equivalent 50/50 mix of ethylene glycol antifreeze and distilled water).
2 Stroke Oil:
Yamalube 2R (or equivalent high-quality NMMA TC-W3 certified 2-stroke oil for premix or oil injection systems).
Engine Seizing:
Potential for engine seizure if lubrication is inadequate or overheating occurs. Manual details proper oil mixture and cooling system maintenance.
Clutch Wear:
Drive belt wear and clutch sheave wear are common maintenance items. Manual provides inspection and adjustment procedures.
Carburetor Fouling:
Carburetors can become fouled with ethanol fuels or debris. Manual provides detailed cleaning and adjustment procedures.
Yamaha Snowmobile:
Yamaha has a long-standing reputation for producing reliable and powerful snowmobiles, dating back to the 1960s. Known for engineering prowess and engine durability.
Viper Lineage:
The Viper series represented Yamaha's flagship performance snowmobiles, evolving from earlier models like the Phazer and Exciter. The 700cc engine was a key advancement in this generation.
Manufacturing Location:
Typically manufactured in North America (e.g., Madison, Georgia, USA for many Yamaha units).
