Vehicle Segment:
Utility ATV
Target Demographic:
Recreational riders, landowners, light utility users
Competitors 2006:
Honda FourTrax, Polaris Sportsman, Kawasaki Bayou, Suzuki Eiger
Transmission Type:
Automatic (CVT)
Drive System:
Likely 4x4 or 2x4 depending on specific sub-model, but 'BRUIN' typically implies 4x4.
Suspension Type:
Independent front suspension, swingarm rear suspension (typical for this class)
Systems Covered:
Safety Information, Machine Identification, Control Functions, Pre-operation Checks, Operation, Riding Techniques, Periodic Maintenance and Adjustment, Cleaning and Storage, Specifications
Manual Type:
Owners Manual
Engine Overview:
Covers basic understanding of the engine layout and key components relevant to the owner.
Controls And Indicators:
Details the function of all handlebars, levers, pedals, and dashboard indicators.
Pre Ride Inspection:
Outlines essential checks before operating the ATV, including fluid levels, tires, and controls.
Operation And Riding:
Provides guidance on starting, stopping, steering, and general riding techniques for safe operation.
Maintenance And Adjustment:
Covers routine maintenance tasks like oil changes, filter replacements, spark plug checks, and basic adjustments.
Cleaning And Storage:
Includes procedures for proper cleaning and long-term storage of the ATV.
Pre Operation Checks:
Detailed step-by-step guide for daily pre-ride inspections.
Fluid Level Checks:
Instructions for verifying engine oil, coolant (if applicable), and brake fluid levels.
Tire Pressure Adjustment:
Guidance on checking and adjusting tire pressure according to specifications.
Basic Lubrication:
Information on where and how to lubricate moving parts.
Routine Cleaning:
Recommended methods for washing and maintaining the ATV's appearance.
Storage Preparation:
Steps for preparing the ATV for seasonal or extended storage.
Depth Level:
Owner-level maintenance and operational guidance; not a comprehensive service or repair manual.
โ๏ธ Engine Specifications
Engine Type:
4-stroke, SOHC, 2-valve
Bore X Stroke:
83 mm x 64.5 mm (Typical for Yamaha 350cc)
Cooling System:
Liquid-cooled
Estimated Horsepower:
~20-22 HP (at crankshaft, estimated for class)
Estimated Torque:
~28-30 Nm (at crankshaft, estimated for class)
Fuel Delivery:
Carburetor (likely Mikuni BSR33)
Fuel Type:
Unleaded gasoline, 87 octane minimum
Ignition System:
TCI (Transistor Controlled Ignition)
Oil Type Recommendation:
Yamalube 4 (or equivalent SAE 10W-30 or 20W-40 API SG or higher)
Oil Capacity:
~2.1 Liters (with filter change)
Transmission Type:
Automatic (Yamaha Ultramaticยฎ CVT)
Drive Modes:
High, Low, Neutral, Reverse
Engine Braking:
Yes, inherent to Ultramaticยฎ CVT design
Final Drive:
Sealed O-ring chain (rear), Shaft drive (front, if 4x4)
Cvt Fluid Type:
Yamaha's recommended CVT fluid or equivalent.
Safety Design Considerations:
Emphasis on stability, control, and rider awareness.
Braking System:
Hydraulic disc brakes (front and rear)
Lighting:
Headlight, taillight, brake light
Ergonomics:
Designed for rider comfort and control during operation.
Rollover Protection:
N/A (ATVs inherently lack the structural rollover protection of UTVs or cars)
Operator Training Emphasis:
Strong emphasis on the importance of proper training and protective gear.
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first.
Air Filter Cleaning:
Every 500 km (300 miles) or as needed based on conditions.
Spark Plug Inspection:
Every 1000 km (600 miles).
Brake Fluid Check:
Monthly or every 500 km (300 miles).
Valve Clearance Check:
Every 2000 km (1200 miles) or 12 months.
Engine Oil Specification:
Yamalube 4 (or SAE 10W-30, 20W-40 API SG or higher)
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid
Common Wear Items:
Brake pads, tires, drive belts (CVT), suspension bushings.
Potential Maintenance Focus:
Proper CVT belt maintenance and cooling system cleanliness are crucial for longevity.
Manufacturer:
Yamaha Motor Corporation
Heritage Focus:
Known for performance, reliability, and innovation in motorcycles and ATVs.
Predecessors:
Yamaha Bear Tracker, Moto-4 series
Key Enhancements Bruin:
Introduction of automatic transmission, improved suspension, and more powerful engines in the mid-300cc class.
Production Period:
The Bruin line generally spanned from the early to mid-2000s.
