Segment:
Mid-size utility ATV
Target Audience:
Recreational riders, hunters, trail explorers, farm use
Key Competitors:
Honda Rancher 4x4, Polaris Sportsman 400/500, Can-Am Outlander 400, Suzuki King Quad 400
Independent Rear Suspension:
Significant advantage for ride comfort and handling over solid rear axle models.
Engine Type:
Reliable and torquey air-cooled single-cylinder engine.
Drivetrain:
On-Command 2WD/4WD system with front differential lock for excellent traction.
Transmission:
Yamaha's proven Ultramatic automatic transmission with engine braking.
Engine:
Complete overhaul, top-end, bottom-end, lubrication, cooling, fuel delivery, ignition, exhaust, emissions
Transmission:
Automatic transmission (Ultramatic), torque converter, drive clutch, driven clutch, belt inspection and replacement, gear reduction
Drivetrain:
Front differential, rear differential (IRS), driveshafts, CV joints, wheel hubs
Suspension:
Independent Rear Suspension (IRS) geometry, front suspension, shock absorbers, springs, control arms, wheel alignment
Brakes:
Hydraulic brake system, front and rear brake calipers, master cylinder, brake lines, brake pads, brake fluid specifications
Electrical:
Battery, charging system (stator, regulator/rectifier), starter motor, ignition system, lighting, wiring diagrams, fuse box, switches, sensors
Chassis:
Frame inspection, steering system, handlebars, footpegs, body panels, seat
Wheels Tires:
Tire pressure specifications, wheel removal/installation, bolt patterns
Maintenance:
Scheduled maintenance (oil changes, filter replacements, spark plug checks), lubrication points, pre-ride inspections
Troubleshooting:
Diagnostic flowcharts, common problems and their solutions, error code interpretation (if applicable)
Repair:
Step-by-step disassembly and reassembly of all major components, torque specifications for fasteners
Rebuild:
Engine rebuild procedures, transmission rebuild procedures, differential overhaul
Adjustment:
Carburetor adjustment, valve clearance adjustment, clutch engagement adjustment
Depth:
Comprehensive: From basic maintenance to complete engine and transmission overhauls, including electrical diagnostics.
Engine Type:
Air-cooled, SOHC, 4-stroke, single-cylinder
Bore X Stroke:
83.0 mm x 64.5 mm
Valve Train:
SOHC, 2 valves
Horsepower Estimate:
Approx. 20-22 HP (at crankshaft, unconfirmed without manual)
Torque Estimate:
Approx. 20-22 lb-ft (at crankshaft, unconfirmed without manual)
Fuel Delivery:
Carburetor (Mikuni BSR33)
Ignition System:
CDI (Capacitor Discharge Ignition)
Cooling Method:
Air-cooled
Oil Type Specification:
Yamalube 4 (or equivalent) SAE 10W-40, API SG, JASO MA
Oil Capacity With Filter:
1.90 US qt (1.8 L)
Starter:
Electric starter, secondary recoil starter
Transmission Type:
Ultramatic Automatic Continuously Variable Transmission (CVT)
Drive Modes:
2WD, 4WD, 4WD with differential lock
Engine Braking:
Yes (Integral feature of Ultramatic CVT)
Drive Belt Type:
Specific Yamaha CVT belt (e.g., 5FV-17641-00-00, verify with manual)
Cvt Fluid Type:
Yamaha recommends specific CVT fluid, or a high-quality automatic transmission fluid (ATF) compatible with CVT applications (verify exact specification in manual)
Atv Safety Standards:
Meets ANSI and SAE standards for recreational ATVs
Braking System:
Hydraulic disc brakes front and rear, often sealed wet-brake rear system.
Parking Brake:
Often integrated into the rear brake caliper or a separate parking brake mechanism.
Throttle Limiter:
Thumb throttle with governor control for progressive acceleration.
Rollover Protection:
Standard ATV design with handlebars and footwells; no specific rollover protection systems like ROPS found on UTVs.
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first (verify exact interval in manual).
Air Filter Cleaning:
Every 1000 km (600 miles) or as needed in dusty conditions.
Spark Plug Check Replacement:
Check every 1000 km (600 miles), replace as needed. (NGK CR6HSA or equivalent)
Belt Inspection:
Inspect at 1000 km (600 miles) for wear, damage, and proper tension. Replace as needed.
Brake Fluid Flush:
Every 2 years or as needed.
Engine Oil Spec:
Yamalube 4 (or equivalent) SAE 10W-40, API SG, JASO MA
Brake Fluid Spec:
DOT 4 hydraulic brake fluid
Cvt Belt Wear:
Regular inspection and replacement of the CVT belt is crucial to prevent performance loss and damage to the drive system.
Carburetor Cleaning:
Carburetor jets can become clogged over time, especially with fuel sitting for long periods, requiring cleaning and adjustment.
Rear Axle Bearings:
While IRS generally provides good durability, improper maintenance or extreme use can lead to wear on rear axle bearings.
Yamaha Atv Legacy:
Yamaha has been a pioneer in the ATV industry, known for robust engineering and reliable powertrains, particularly with their Big Bear and Kodiak lines.
Grizzly Lineage:
The Grizzly nameplate is synonymous with off-road capability and comfort. The 350 IRS model brought independent rear suspension to a more accessible price point within the Grizzly family.
Introduction Of Irs:
Introduction of IRS on this model marked a step up in comfort and handling compared to its solid-axle predecessors or contemporaries.
Manufacturing Location:
Primarily manufactured in Japan or North America by Yamaha.
