🏷️ Basic Information

Make:

Yamaha

Model:

Banshee 350

Year:

1989

Chassis Code:

2XD

Engine Code:

2XE

👋 Introduction

Market Position:

The 1989 Yamaha Banshee 350 was a flagship performance ATV, known for its powerful two-stroke twin-cylinder engine and sport-oriented design. This manual positions itself as the definitive resource for owners and technicians seeking to maintain and repair this iconic machine, mirroring dealer-level expertise.

Competitive Analysis:

In its era, the Banshee competed with other high-performance ATVs. This service manual provides the technical depth necessary to keep it running at peak performance, distinguishing it from less comprehensive aftermarket guides. Its factory origin ensures accuracy and completeness for all aspects of the vehicle's operation and repair.

Key Features:

Factory-level diagnostic and repair information, extensive page count (320+), detailed coverage of all major vehicle systems, troubleshooting guides, clear procedures for maintenance and component replacement.

📋 Manual Details

Systems Covered List:

Page Count:

320+

Manual Type:

Factory Service Manual

Language:

English

Format:

Print

📖 Manual Coverage

Engine Systems:

Fuel, Lubrication, Cooling, Combustion, Carburetion, Ignition, Exhaust, Starting

Drivetrain Systems:

Transmission, Clutch, Drive Shaft, Axles, Final Drive

Chassis Systems:

Frame, Suspension (Front and Rear), Steering, Wheels, Tires, Brakes

Electrical Systems:

Ignition System, Lighting System, Charging System, Battery, Wiring Diagrams

Body And Trim:

Fenders, Body Panels, Seat, Handlebars, Decals

Maintenance Procedures:

Routine Inspections, Fluid Changes, Filter Replacements, Chain Adjustment, Spark Plug Service, Carburetor Cleaning/Adjustment

Repair Procedures:

Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake System Repair, Electrical Component Diagnosis/Replacement, Exhaust System Repair

Diagnostic Procedures:

Troubleshooting Guides, Symptom-Based Diagnostics, Component Testing Procedures

Installation Procedures:

Engine Removal and Installation, Component Reassembly

Technical Depth:

Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, with detailed diagrams and specifications.

📊 Manual Specifications

File Format:

Physical Printed Manual

Print Quality:

High-quality printing with clear diagrams and text.

Binding Type:

Likely a durable bound format suitable for shop use (e.g., saddle-stitched or perfect bound).

Paper Type:

Durable, potentially glossy or semi-gloss paper to withstand shop environment and frequent use.

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, 2-stroke, V-twin

Displacement:

347 cc

Bore X Stroke:

64.0 mm x 54.0 mm

Compression Ratio:

7.2:1 (nominal)

Carburetion:

Dual Mikuni VM26SS carburetors

Horsepower Approximate:

Approx. 30-35 HP (at crankshaft, varies by source and tuning)

Torque Approximate:

Approx. 25-28 lb-ft (at crankshaft, varies by source and tuning)

Fuel Type:

Unleaded gasoline (minimum 87 octane recommended, higher octane for improved performance/reduced pinging)

Fuel Mix Ratio:

2-stroke oil mixed with gasoline (typically 20:1 or 32:1 depending on oil and usage, refer to manual for specific recommendation)

Lubrication Type:

Premix or Autolube system (depending on exact model configuration, though premix is common for this era)

Cooling System:

Liquid-cooled

Coolant Type:

Proprietary Yamaha liquid-cooled engine coolant or equivalent ethylene glycol-based coolant

Ignition System:

CDI (Capacitor Discharge Ignition)

Spark Plug Type:

NGK BR9ES or equivalent

🔧 Transmission

Transmission Type:

6-speed constant mesh

Clutch Type:

Wet, multi-disc

Drive Type:

Chain Drive

Transmission Features:

Sequential shifting, powerful torque delivery suitable for sport riding.

📐 Dimensions

Length:

Approx. 70.5 inches (1790 mm)

Width:

Approx. 43.7 inches (1110 mm)

Height:

Approx. 41.7 inches (1060 mm)

Dry Weight:

Approx. 331 lbs (150 kg)

Fuel Capacity:

3.2 gallons (12 liters)

Oil Capacity:

1.1 US qt (1.05 L) for autolube reservoir (if equipped)

Front Tire Size:

AT21 x 7-10

Rear Tire Size:

AT22 x 11-10

Front Wheel Size:

10 x 5.5

Rear Wheel Size:

9 x 9

🛡️ Safety Features

Safety Ratings:

As an ATV, it is designed for off-road use and is subject to manufacturer warnings and recommendations regarding safe operation. No formal crash test ratings apply like passenger vehicles.

Active Safety Features:

Hydraulic disc brakes front and rear, responsive steering system.

Passive Safety Features:

Handlebar guards, sturdy frame construction.

💡 Technology Features

Infotainment Features:

No infotainment system. Designed for pure performance and off-road use.

Driver Assistance Features:

No driver assistance features. Relies on rider skill and vehicle control.

Connectivity Features:

No connectivity features.

Lighting System:

Dual Halogen headlights, LED taillight/brake light (typical for this era).

🔧 Maintenance

Oil Change Interval:

Refer to manual; typically based on hours of use or season. For 2-stroke premix, regular fuel checks are crucial. For autolube, check reservoir level frequently.

Spark Plug Replacement:

Check and clean every few hundred miles or as needed. Replacement interval depends on usage and plug condition, typically every 1000-2000 miles or annually.

Air Filter Cleaning:

Frequent inspection and cleaning recommended, especially in dusty conditions. Washable filters require periodic cleaning and re-oiling.

Chain Lubrication And Adjustment:

Lubricate chain after every wash or ride in wet conditions. Check and adjust tension regularly according to manual specifications.

2 Stroke Oil Recommendation:

Yamalube 2R or equivalent high-quality synthetic 2-stroke oil for premix or autolube systems. Consult manual for precise grade and mix ratio.

Coolant Type:

Yamaha's recommended liquid-cooled engine coolant or equivalent ethylene glycol-based coolant with corrosion inhibitors.

Brake Fluid Type:

DOT 3 or DOT 4 hydraulic brake fluid

Known Issues Common:

Carburetor clogging due to ethanol in modern fuels, wear on power valve components, transmission wear (especially if ridden aggressively), cooling system leaks, CDI unit failure, electrical connector corrosion.

Performance Modifications Common:

Popular for performance modifications including aftermarket pipes, reeds, carburetors, and engine porting, which can require recalibration of fuel and ignition systems.

📚 Vehicle History

Brand Heritage:

Yamaha has a long-standing history of producing high-quality motorcycles and recreational vehicles, known for innovation and performance.

Model Evolution:

The Banshee 350, introduced in 1987, was Yamaha's answer to the burgeoning sport ATV market. It was derived from Yamaha's RD350LC motorcycle engine, giving it exceptional power and performance for its time. The 1989 model represents an early but well-established iteration of this popular platform.

Production Years For Model:

1987-2006 (with various updates and engine size variations over its lifespan)

🏆 Awards & Recognition

Recognitions:

While specific awards for the 1989 model year might be scarce, the Yamaha Banshee as a model is widely recognized within the ATV community as a legendary and highly influential sport ATV, paving the way for future performance machines.