🏷️ Basic Information

Make:

Yamaha

Model:

YFZ 350 Banshee

Model Designation:

YFZ350J/K

Vehicle Type:

All-Terrain Vehicle (ATV)

Chassis Codes:

YFZ350J, YFZ350K

👋 Introduction

Market Position:

The Yamaha YFZ 350 Banshee is an iconic performance ATV, renowned for its potent two-stroke engine and dual-carburetor setup. It occupied a dominant position in the sport ATV market for many years, appealing to riders seeking high-performance off-road capabilities.

Competitors:

Competed directly with other high-performance sport ATVs of its era from manufacturers like Suzuki (e.g., LT series), Honda (e.g., TRX series), and Kawasaki (e.g., KXT/KXR series).

Key Features Vehicle:

Dual-cylinder, liquid-cooled, two-stroke engine; 6-speed manual transmission with reverse; powerful disc brakes; long-travel suspension; distinctive dual exhaust system.

Key Features Manual:

Instant Digital Download, Printable, Factory Original Data, Comprehensive Coverage, Zoom Functionality.

📋 Manual Details

Covered Model Years:

1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003

Estimated Page Count:

Detailed page count not specified, but described as 'COMPLETE FACTORY SERVICE / REPAIR / WORKSHOP MANUAL'.

Manual Type:

Factory Service / Repair / Workshop Manual

Language:

English (assumed based on product description and common industry practice)

Delivered Format:

PDF Download

📖 Manual Coverage

Engine Systems:

Cylinder Head, Block, Pistons, Rings, Rods, Crankshaft, Oil Pump, Pan, Ignition, Spark Plugs, Valve train (Camshaft, Cam, Valves, Valve stems, Valve guides, Valve springs, Valve locks), Carburetor Assembly (Carb, Throttle Shaft, Choke Shaft, Choke Valve, Air Screw), Fuel System (Fuel Pump, Fuel Filter, Fuel Injector, Fuel Screen, Fuel Pipe), Oil Cooling, Radiator, Radiator Fan, Oil Radiator, Cooling System, PCV

Transmission Drivetrain:

Transmission, Clutch (Clutch, Clutch Shoe, Clutch Case, Clutch Kit, Clutch Slave Cylinder, Clutch Master Cylinder, Pressure Plate, Flywheel), Transfercase, Transfer Case, Transfer Plate, Axles, Axle Assembly, Axle Shafts, CV Boots, Shift Linkage, Shifter Cable, Shifters

Brakes Suspension Steering:

Brakes, Brake Pads, Brake Shoes, Rotor, Rotor Replacement, Brake Discs, Brake System, Suspension, Suspension System, Steering System, Shocks, Struts, Tires, Rotate Tires, Alignment, Wheel Cover, Hub Caps, Lugs, Lug Nuts

Electrical Ignition:

Ignition, Spark Plugs, Spark Plug Wires, Ignition Coil, Alternator, Alternator Pulley, Starter, Starter Replacement, Battery, Battery Replacement, Wiring Harness, Engine Harness, Chassis Wire Harness, Main Wire Harness, Electrical Pin Connector, Relay (Headlight Relay, Starter Relay, Ignition Relay), Sensors (Oil Sensor, Pressure Sensor, Oil Pressure Sensor, Oxygen Sensor), Volt Meter, HID, Projector, Interior Lighting, Lights, Third Brake Light, Turn Signal, Side Markers, Fog Lights, Foglight Replacement, Driving Lights, Backup Lights, Courtesy Light, Door Jamb Switch

Exhaust Emissions:

Muffler, Downpipe, Cat, Catalytic Converter, Exhaust, Headers, Heat Wrap, Manifold

Body Chassis Interior:

Air Deflector, Air Hose, Clutch Hose, Brake Hose, Frame, Motor Mounts, Clips, Heat Exchanger, Air Seals, Gaskets, Grommets, Orings, O-Ring, O-Rings, Plug Cap, Grommet, Spacer, Recoil Assembly, Carburetor Assembly, Diaphragm, Pump, Spring, Inlet Valve, Welch Plug, Air Filter, Air Filter Replacement, Fan Cover, Filter Cover, Filter Housing, Sleeve, Choke Lever, Switch Assembly, Recoil Starter, Puller Assembly, Hinge, Door Hinge, Door Panels, Dashboard, Dash Replacement, Air Bags, CD Player Replacement, Glovebox, Center Console, Console Replacement, Interior Lighting, Trim, Trim Replacement, Floor Mat, Cargo Liners, Consoles, Organizers, Leather, Glass, Window, Windshield, Steering Wheel, Shifter, Pedals, Bumper, Front Bumper, Rear Bumper, Fender, Doors, Emblem, Fuel Cap, Fuel Door, Grilles, Front Grille, Hood, Jack, Hoist, Lifting, Stands, Mud Guards, Mud Flaps, Door Lock, Fuel Filler Neck, Antenna

Routine Maintenance:

Oil Change, Transmission Change, Fluid Change, Air Filter Replacement, Fuel Filter Replacement, Tire Rotation, Brake Pad Replacement, Spark Plug Replacement, Battery Replacement, Wiper Blade Replacement

Diagnostic Troubleshooting:

Component diagnostics, fault finding for all major systems, electrical troubleshooting using wiring diagrams, symptom-based troubleshooting

Engine Rebuild Repair:

Complete engine disassembly and reassembly, piston and ring replacement, crankshaft and rod repair, cylinder head service, valve train overhaul, crankshaft balancing, machining procedures

Transmission Drivetrain Repair:

Clutch inspection and replacement, transmission disassembly and reassembly, transfer case servicing, axle and CV boot repair

Brake Suspension Steering Repair:

Brake system bleeding and service, rotor replacement, suspension component replacement, steering system adjustment and repair

Electrical System Repair:

Wiring harness repair, component testing (alternator, starter, ignition), sensor diagnosis, lighting system repair

Exhaust System Repair:

Muffler and header replacement, exhaust gasket replacement, catalytic converter service

Body Chassis Repair:

Body panel repair and replacement, trim installation, interior component replacement, glass and windshield replacement, hinge and latch repair

Depth Of Coverage:

Comprehensive Factory Level. Covers everything from routine maintenance and fluid changes to complete engine rebuilds, transmission overhauls, electrical system diagnostics, and bodywork.

Diagnostic Information:

Includes detailed diagnostic procedures, troubleshooting charts, and likely specific error codes or symptom analysis.

Specifications Data:

Contains critical torque specifications, fluid capacities, part numbers, tolerances, and electrical schematics.

Procedural Detail:

Step-by-step instructions with accompanying diagrams and illustrations for most repair and maintenance procedures.

📊 Manual Specifications

File Format:

PDF

Printability:

Printable

Zoom Functionality:

Yes (allows zooming in/out)

Quality Descriptor:

Factory Quality

Binding Type:

Digital Download (PDF)

Paper Type:

N/A (Digital)

⚙️ Engine Specifications

Engine Type:

Two-Stroke, Liquid-Cooled, Reed Valve

Engine Configuration:

Parallel-Twin

Displacement:

347 cc (21.2 cu in)

Bore X Stroke:

64.0 mm x 54.0 mm (2.52 in x 2.13 in)

Compression Ratio:

6.4:1 (typical, may vary slightly by year)

Horsepower:

Approx. 40-50 HP (varies by model year and tuning)

Torque:

Specifications vary, but known for strong mid-range torque.

Carburetors:

Dual Mikuni VM26SS (or similar variant)

Fuel Type:

Unleaded gasoline (typically 91 octane or higher recommended)

Fuel Delivery:

Carburetor

Oil Type:

2-Stroke Pre-mix or Oil Injection System (check specific year for system type)

Ignition System:

CDI (Capacitor Discharge Ignition)

Spark Plugs:

NGK BR9ES (typical, refer to manual for exact spec)

Cooling Method:

Liquid Cooling

Coolant Capacity:

Approximately 2.1 L (2.2 US qt) - refer to manual for exact specification

Coolant Type:

Ethylene Glycol based coolant (50/50 mix with distilled water recommended)

🔧 Transmission

Transmission Type:

Constant Mesh, 6-Speed Manual

Clutch Type:

Wet, Multiple Disc

Drive Type:

Chain Drive

Reverse:

Yes (6-speed transmission with reverse gear)

Transmission Fluid Type:

Yamalube 2-Stroke Oil (for pre-mix) or specified injection oil; Gear Oil for gearbox (refer to manual for specific type and viscosity, e.g., SAE 80W-90)

Transmission Fluid Capacity:

Gearbox oil capacity typically around 0.75 L (0.8 US qt) - refer to manual.

📐 Dimensions

Length:

Approx. 70.9 in (1800 mm)

Width:

Approx. 46.1 in (1170 mm)

Height:

Approx. 43.5 in (1105 mm)

Wheelbase:

Approx. 49.2 in (1250 mm)

Dry Weight:

Approx. 397 lbs (180 kg)

Fuel Capacity:

Approx. 2.5 US gal (9.5 L)

🛡️ Safety Features

Atv Safety Standards:

Compliant with ANSI/SVIA standards for Class II ATVs.

Braking System:

Hydraulic Disc Brakes (Front and Rear)

Lighting:

Dual Halogen Headlights, LED Taillight/Brake Light

Handlebars:

ATV-specific handlebars with padded crossbar for improved control and impact absorption.

Footwells:

Wide, integrated footpegs with heel guards for rider security.

💡 Technology Features

Infotainment System:

N/A (This is a performance ATV focused on function, not infotainment.)

Driver Assistance Features:

N/A (No electronic driver assistance features are present on this model.)

Connectivity Features:

N/A (No external connectivity features.)

🔧 Maintenance

Oil Change Interval:

Refer to manual, typically every 20-30 engine hours or annually.

Air Filter Cleaning:

Frequent checks and cleaning recommended, especially in dusty conditions. Replacement as needed.

Spark Plug Replacement:

Refer to manual, typically every 100-200 engine hours or as wear indicates.

Chain Lubrication:

Regular lubrication is critical for the drive chain, recommended every 5-10 operating hours.

Engine Oil Type:

High-quality 2-stroke motorcycle oil. Pre-mix ratio or oil injection oil specification is critical and must be followed from the manual.

Gearbox Oil Type:

SAE 80W-90 hypoid gear oil (or as specified in manual). Check manual for specific Yamaha or API classifications.

Coolant Type:

50/50 mix of ethylene glycol coolant and distilled water.

Common Issues Engine:

Carburetor tuning can be sensitive, potential for heat-related issues in prolonged high-RPM use, need for precise 2-stroke oil/fuel mixture. Crankshaft seals can degrade over time.

Common Issues Drivetrain:

Clutch wear is common with aggressive riding. Chain adjustment and maintenance are crucial.

Common Issues Electrical:

Wiring harness integrity, CDI unit reliability, and stator output can be points of failure over time.

📚 Vehicle History

Yamaha Atv History:

Yamaha has a long and successful history in ATV manufacturing, dating back to the early Yamahauler models. They are known for innovation and performance in the off-road segment.

Banshee Introduction:

The YFZ 350 Banshee was introduced in 1987, leveraging Yamaha's expertise in two-stroke engines from their motorcycle division. It quickly became a benchmark for performance ATVs.

Production Run:

Produced from 1987 to 2006 in its original form, with continuous updates and refinements throughout its lifespan. The manual covers the J/K series from 1987-2003, representing a significant portion of its production.

Manufacturing Location:

Primarily manufactured by Yamaha Motor Corporation.

🏆 Awards & Recognition

Industry Recognition:

The YFZ 350 Banshee is widely recognized as one of the most iconic and capable sport ATVs ever produced, often lauded for its raw power and handling.

Enthusiast Following:

Maintains a strong and dedicated enthusiast following, with a thriving aftermarket support and community.