Years Covered:
1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
Chassis Codes:
Specific chassis codes would require accessing the manual's detailed sections, but generally include variations like 4LO, 1UY, 3GG, etc., for different production years.
Engine Codes:
Likely variations around '30X' or similar, referring to the 347cc liquid-cooled 2-stroke parallel-twin engine.
Market Segment:
High-performance sport ATV.
Target Audience:
Enthusiasts, racers, and owners seeking to maintain and repair their Yamaha YFZ 350 Banshee.
Competitive Landscape:
The Banshee was a dominant force in the sport ATV market, often competing with models from Suzuki (e.g., LT250R, LT500R) and Honda (e.g., TRX250R, TRX450R) during its production run.
Unique Selling Points:
The dual-cylinder, liquid-cooled, 2-stroke engine with its potent power delivery and the Banshee's iconic status in the off-road community are key features.
Electrical System Diagnostics:
Yes
Suspension And Steering:
Yes
Fuel And Carburetion:
Yes
Troubleshooting And Diagnostics:
Yes
Lubrication Procedures:
Yes
Technical Specifications:
Yes
Estimated Page Count:
Likely 300-500+ pages, typical for comprehensive service manuals covering a decade of a performance ATV.
Manual Type:
Service and Repair Manual
Digital Delivery:
Instant Download
Engine:
Full rebuild procedures for the 347cc liquid-cooled, reed valve, 2-stroke, parallel-twin engine, including top-end (cylinder head, piston, rings) and bottom-end (crankcase, crankshaft, bearings, seals) work.
Transmission:
Complete coverage of the 6-speed manual transmission, including gearshift linkage, sub-transmission, clutch operation and service, and internal transmission components.
Fuel System:
Detailed information on the carburetor systems (likely dual Mikuni VM26), fuel pump, fuel lines, and fuel tank maintenance and adjustment.
Electrical System:
Comprehensive coverage including battery, charging system (stator, rectifier/regulator), ignition system (CDI, coils, spark plugs), electric starter, and switches.
Chassis And Suspension:
Detailed procedures for front wheel and suspension (steering components, A-arms, shocks, springs) and rear wheel and suspension (swingarm, linkage, shocks, hubs).
Braking System:
In-depth coverage of the hydraulic braking system, including front and rear brake calipers, master cylinders, brake lines, and brake fluid specifications.
Routine Maintenance:
Yes, including lubrication points, fluid changes, air filter cleaning/replacement, spark plug checks, and chain adjustment.
Disassembly And Assembly:
Yes, step-by-step instructions for component removal and installation across all major systems.
Diagnostics And Troubleshooting:
Yes, includes detailed troubleshooting charts and symptom-based diagnostic procedures.
Performance Tuning:
Implied through detailed carburation and engine section, allowing for expert tuning.
Depth Of Coverage:
Comprehensive, covering everything from basic adjustments to complete engine and transmission rebuilds, including electrical schematics.
PDF Quality:
High-resolution, suitable for clear viewing and printing.
Searchability:
Likely text-searchable PDF, allowing quick navigation to specific topics.
Print Capability:
Printable, allowing users to create physical copies of sections or the entire manual.
Binding Type:
N/A (Digital PDF)
Paper Type:
N/A (Digital PDF)
Pc Mac Compatibility:
Yes
Engine Type:
Liquid-cooled, 2-stroke, reed valve, parallel-twin
Bore X Stroke:
54.0 mm x 75.0 mm (Typical, may vary slightly by year)
Compression Ratio:
6.6:1 (Typical, varies by year/model)
Carburetor:
Dual Mikuni VM26SS (Typical)
Horsepower:
Approximately 40-50 hp (stock, depending on year and tuning)
Torque:
Approximately 30-35 lb-ft (stock, depending on year and tuning)
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended, higher octane for performance applications)
Fuel Mixture:
Premix: 50:1 ratio of gasoline to 2-stroke engine oil (Yamalube 2R or equivalent).
Transmission Type:
6-speed manual constant mesh
Optional Features:
N/A (Standard configuration)
Clutch Type:
Wet, multiple-disc
Gear Ratios:
Specific ratios vary by year but are detailed in the manual for each gear.
Final Drive:
O-ring sealed chain drive
Transmission Oil Capacity:
Approx. 1.0 L (Check manual for specific year)
Transmission Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4 transmission oil)
Safety Ratings:
N/A (ATVs typically do not receive NHTSA or IIHS crash ratings like passenger vehicles.)
Braking System:
Hydraulic disc brakes front and rear for strong stopping power.
Handlebar Design:
Wide handlebars for control and leverage.
Bodywork Design:
Ergonomic seating and body panels for rider positioning and control.
Oil Change Transmission:
Recommended every 20-30 operating hours or annually.
Air Filter Cleaning:
Check every 5-10 operating hours, clean as needed. Replacement is usually based on condition.
Spark Plug Inspection:
Check every 10-15 operating hours, clean and gap as needed. Replacement typically every 30-40 operating hours.
Engine Top End Rebuild:
Recommended based on usage, typically between 100-200 operating hours for optimal performance, or if compression is lost.
Coolant Type:
Ethylene glycol-based coolant, mixed 50/50 with distilled water. Capacity: Approx. 1.5 L (check manual for specific year).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Common Wear Items:
Clutch plates, piston rings, crank seals, wheel bearings, tie rod ends, and carburetor jets are common wear items due to the performance-oriented nature of the Banshee.
Carburetor Tuning:
The dual carburetors can be sensitive to altitude, temperature, and modifications, often requiring re-jetting for optimal performance.
Yamaha Heritage:
Yamaha has a long and storied history in powersports, known for performance, reliability, and innovation across motorcycles, ATVs, and other recreational vehicles.
Banshee Lineage:
The YFZ 350 Banshee, introduced in 1987, was based on Yamaha's successful RZ350 motorcycle engine, bringing road-racing derived technology to the ATV market. It became an icon of performance and was produced for many years with minor updates.
Production Years:
1987-2006 (with the specified manual covering 1986-1997 models, indicating early production variants).
Manufacturing Location:
Primarily manufactured in Japan by Yamaha Motor Corporation.