Segment:
Mid-size utility ATV
Target Audience:
Hunters, recreational riders, light utility users
Key Competitors:
Polaris Sportsman 400, Arctic Cat 300, Honda FourTrax 300/350
Distinguishing Features:
Independent Rear Suspension (IRS) for improved comfort and traction, reliable Yamaha engine, robust 4WD system, Hunter Edition specific features (e.g., enhanced brush guards, camouflage paint options often).
Engine Mechanical:
Full overhaul, disassembly, assembly, component inspection, specifications, torque values
Fuel System:
Carburetor tuning, cleaning, overhaul, fuel pump, fuel lines, fuel tank
Ignition System:
CDI unit, ignition coil, spark plug, timing
Cooling System:
Radiator, fan, coolant specifications, hoses, thermostat
Electrical System:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting, starter system, switches
Transmission Drivetrain:
Automatic transmission (Ultramatic), clutch operation, drive shafts, differential (front and rear), CV joints, final drive
Suspension System:
Front A-arms, rear independent suspension, shock absorbers, springs, bushings, alignment
Steering System:
Handlebars, steering shaft, tie rods, steering knuckle, troubleshooting
Braking System:
Hydraulic disc brakes (front and rear), brake calipers, master cylinder, brake lines, bleeding procedure
Chassis Frame:
Frame inspection, welds, component mounting
Bodywork Plastics:
Fender removal/installation, body panel repair and replacement
Wheels Tires:
Tire pressure specifications, wheel bearing service
Routine Maintenance:
Oil changes, filter replacements, chain lubrication (if applicable), air filter cleaning/replacement, spark plug checks
Troubleshooting:
Diagnostic procedures for common starting, running, and performance issues
Repair Procedures:
Step-by-step instructions for component removal, repair, and reassembly
Overhaul Instructions:
Complete engine and transmission rebuild guidelines
Electrical Diagnostics:
Fault finding using wiring diagrams and multimeter readings
Fluid Management:
Correct fluid types, capacities, and replacement intervals for all systems
Depth Level:
Comprehensive: Covers basic maintenance to full engine and transmission rebuilds
Diagnostic Capabilities:
Detailed troubleshooting charts and fault isolation procedures
Repair Detail:
Explicit step-by-step instructions with clear diagrams and photos
Searchability:
Text-searchable for quick information retrieval
Printability:
Printable pages for workshop use
Resolution:
High resolution, allowing for detailed zooming on diagrams and text
Quality Description:
Computer generated, not scanned; ensuring clarity and accuracy
Binding:
N/A (Digital PDF download)
Paper Quality:
N/A (Digital PDF download)
Engine Type:
4-stroke, SOHC, air-cooled
Bore X Stroke:
83.0 mm x 64.5 mm
Horsepower Estimate:
Approx. 19-20 HP (based on similar models)
Torque Estimate:
Approx. 18-19 lb-ft (based on similar models)
Carburetor Type:
Teikei Y24 (often Mikuni VM24 variant)
Fuel Capacity:
3.4 gallons (12.8 liters)
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher, JASO certified)
Type:
Automatic (Yamaha Ultramatic)
Gearbox:
CVT (Continuously Variable Transmission) with Hi/Lo range, Neutral, Reverse
Drive System:
Shaft drive (front and rear)
Differential Lock:
2WD/4WD with On-Command push-button engagement
Transmission Fluid Type:
Yamaha Ultramatic Transmission Fluid (or equivalent high-quality ATV CVT fluid)
Engine Oil Change:
Every 100 hours or 6 months
Air Filter Cleaning:
Every 20 hours or monthly (more frequently in dusty conditions)
Spark Plug Check:
Every 100 hours or annually
Gear Oil Change:
Every 100 hours or annually (front and rear differentials)
Engine Oil Capacity:
1.77 US qt. (1.68 L) with filter change
Gear Oil Specification:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4)
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid
Common Wear Items:
CV boots, brake pads, wheel bearings, suspension bushings due to off-road use.
Potential Issues To Monitor:
Carburetor jetting adjustments for altitude/temperature changes, occasional starter solenoid issues.
Heritage Notes:
Yamaha has a long-standing reputation for building reliable and durable off-road vehicles, including ATVs and motorcycles.
Predecessor Model:
Grizzly 350 (non-IRS models) and previous 350cc class ATVs from Yamaha.
Key Development:
Introduction of Independent Rear Suspension (IRS) provided a significant upgrade in ride quality and handling compared to solid rear axle designs.
Manufacturing Location:
Primarily manufactured in Japan or Taiwan by Yamaha Motor Corporation.
Production Era:
The 350cc Grizzly platform was a staple in Yamaha's ATV lineup for many years, with the IRS variant being a notable evolution.
