Segment:
Performance Trail Snowmobile
Competitors:
Yamaha Phazer, Arctic Cat Jag, Polaris Indy 500 (circa 1982)
Performance Focus:
The Ultra Sonic was known for its agility and responsive handling, targeting riders who prioritized performance.
Engine Type:
Likely a liquid-cooled twin-cylinder two-stroke engine, emphasizing power and smooth operation.
Suspension Design:
Advanced (for its time) suspension system designed for improved ride comfort and handling over varied terrain.
Engine Mechanical:
Detailed coverage of engine disassembly, inspection, repair, and reassembly, including cylinder head, pistons, crankshaft, and lubrication system.
Ignition System:
Covers ignition timing, spark plugs, coils, and troubleshooting of ignition-related issues.
Carburetor System:
In-depth explanation of carburetor function, adjustment, cleaning, and rebuilding, including specific jetting and settings.
Drive Clutch And Driven Clutch:
Comprehensive details on clutch operation, maintenance, adjustment, and replacement of belts and rollers.
Skid Frame And Suspension:
Information on shock absorbers, trailing arms, suspension geometry, and lubrication points.
Steering System:
Covers steering linkage, handlebars, bearings, and adjustment procedures.
Braking System:
Details on brake lever, cable adjustment, and caliper/pad service.
Electrical And Lighting:
Wiring diagrams, lighting circuits, starter system, and battery maintenance.
Chassis And Bodywork:
Covers body panels, seat, windshield, and chassis components.
Routine Maintenance:
Oil changes, lubrication, spark plug replacement, belt inspection, track tension adjustment.
Engine Repair:
Top-end rebuilds, bottom-end overhauls, cylinder boring, piston replacement, valve adjustments (if applicable).
Carburetor Tuning:
Precise instructions for idle speed, air-fuel mixture, and jetting for various conditions.
Clutch Adjustment:
Correct procedures for setting drive and driven clutch engagement and backshift.
Suspension Setup:
Guidelines for adjusting suspension for different rider weights and terrain.
Electrical Diagnostics:
Step-by-step troubleshooting for electrical faults using multimeter readings and circuit analysis.
Brake Servicing:
Bleeding procedures, pad replacement, and caliper maintenance.
Track Maintenance:
Inspection for damage, proper tensioning, and replacement guidance.
Depth:
Comprehensive, suitable for professional technicians and advanced DIY mechanics. Covers diagnostics, adjustments, repairs, and complete overhauls.
Engine Type:
Liquid-Cooled, Two-Stroke, Rotary Valve
Displacement:
Approximately 460cc - 500cc (Exact specification requires manual confirmation)
Horsepower Estimated:
60-70 HP (Estimated based on class and era)
Torque Estimated:
Specific torque figures are typically not emphasized in snowmobile manuals, focus is on power delivery.
Carburetor Type:
Dual Mikuni VM or similar (Specify model number if known from manual)
Fuel Type:
Unleaded gasoline (minimum 87 octane)
Oil Mixing:
Premix oil and gasoline at specified ratio (e.g., 40:1 or 50:1 - confirm with manual)
Transmission Type:
CVT (Continuously Variable Transmission) via Drive and Driven Clutches
Gearbox Features:
No traditional gearbox; CVT handles gear ratio changes automatically.
Clutch Engagement Speed Rpm:
Specific RPM figures for clutch engagement and full shift-out are detailed in the manual.
Drive Belt Part Number:
Part number for the primary drive belt would be specified in the manual.
Length Overall Approx:
N/A (Dimensions vary, consult manual for specifics)
Width Overall Approx:
N/A (Dimensions vary, consult manual for specifics)
Height Overall Approx:
N/A (Dimensions vary, consult manual for specifics)
Storage Compartment:
Likely integrated storage under the seat or rear rack space.
Dry Weight Approx:
400-450 lbs (Estimated, confirm with manual)
Fuel Capacity Gallons:
Approx. 7-8 gallons (Confirm with manual)
Crash Test Data:
Snowmobiles of this era were not subjected to standardized crash testing like automobiles. Safety focus is on rider protection and vehicle stability.
Engine Kill Switch:
Standard tethered kill switch for immediate engine shutdown.
Braking System Type:
Hydraulic disc brake (typically rear track brake) and/or mechanical brake.
Windscreen:
Standard windshield for rider protection from wind and snow.
Lighting:
Headlight and taillight for visibility.
Oil Change Interval:
Regular checks and top-offs as needed for premix; if an oil injection system is present, follow manual's recommendation.
Spark Plug Replacement:
Typically every 1,000-2,000 miles or as specified by plug manufacturer, confirmed in manual.
Clutch Maintenance:
Regular inspection of belt, rollers, and clutch surfaces; specific intervals for cleaning and lubrication detailed in the manual.
Lubrication Points:
Refer to the manual's lubrication chart for all grease points on suspension, steering, and drive components.
Engine Oil Type:
2-stroke synthetic or semi-synthetic oil, mixed with gasoline at recommended ratio (e.g., 50:1) - confirm specific brand and type in manual.
Coolant Type:
If liquid-cooled, typically a mixture of antifreeze and water (e.g., 50/50 Ethylene Glycol) - confirm specific type and ratio in manual.
Gearcase Oil:
Specific gear oil for any gear reduction units or drives - consult manual for type and capacity.
Carburetor Gumming:
Common issue with older carbureted engines; requires periodic cleaning and fresh fuel stabilizer.
Clutch Belt Wear:
Drive belts are wear items and require regular inspection for cracks, fraying, and proper tension.
Suspension Bushings Wear:
Rubber bushings in suspension components can degrade over time, leading to play and poor handling.
Seals And Gaskets:
Aging seals and gaskets can lead to oil or coolant leaks.
Brand Origin:
Ski-Doo, a brand of BRP (Bombardier Recreational Products), has a long history of innovation in snowmobile technology, dating back to the 1950s.
Ultra Sonic Placement:
The Ultra Sonic was positioned as a premium, performance-oriented trail sled within Ski-Doo's 1982 lineup, aiming to offer a more refined riding experience.
Manufacturing Era:
Early 1980s, a period of significant advancement in snowmobile design and performance.
Key Innovations Of Era:
Improvements in engine cooling, suspension travel, and weight reduction characterized this era.
