The 2004 Yamaha Banshee 350cc is a continuation of Yamaha’s legendary sport ATV line, renowned for its aggressive styling, powerful two-stroke twin-cylinder engine, and exceptional performance capabilities. This model embodies the spirit of high-adrenaline off-road riding, combining raw power, precision handling, and durability. The 2004 Banshee remains a favorite among experienced riders who seek thrilling acceleration and nimble maneuverability on trails, dunes, and race tracks.
▌Engine and Performance
– Engine Type: Parallel twin-cylinder, two-stroke, liquid-cooled
– Displacement: 347 cc
– Bore x Stroke: 64.0 mm x 54.0 mm
– Compression Ratio: Approximately 6.6:1
– Fuel System: Dual Mikuni carburetors (34 mm)
– Ignition: Capacitor Discharge Ignition (CDI)
– Starting System: Kick start only
The heart of the 2004 Banshee is its unique two-stroke, parallel twin-cylinder, liquid-cooled engine. Unlike most ATVs that use single-cylinder engines, the twin-cylinder design delivers a broader powerband with strong low-end torque and explosive high-end power. This engine produces approximately 50 horsepower, providing rapid acceleration and exhilarating top speeds.
Liquid cooling ensures consistent engine temperatures, allowing the Banshee to perform reliably during extended, aggressive rides. The dual Mikuni carburetors allow for precise fuel metering, contributing to smooth throttle response and efficient combustion.
▌Transmission and Drivetrain
– Transmission: 6-speed manual with wet multi-plate clutch
– Drive Type: Chain drive to rear wheels
– Gear Shift: Foot-operated sequential shift
The 6-speed transmission allows riders to fully exploit the engine’s power across various terrains and riding styles. The close gear ratios help maintain the engine in its optimal power range, whether climbing steep inclines or sprinting on flat terrain. The chain drive system is durable, efficient, and simple to maintain.
▌Suspension and Handling
– Front Suspension: Independent double A-arm with adjustable shocks
– Rear Suspension: Swingarm with Monocross single shock absorber
– Suspension Travel: Approximately 7.1 inches front, 7.9 inches rear
– Brakes: Hydraulic disc brakes on front and rear wheels
The 2004 Banshee’s suspension is designed for sporty, aggressive riding. The independent double A-arm front suspension offers excellent wheel articulation for stability and control over rough terrain. The rear Monocross suspension provides progressive damping, enhancing traction and rider comfort.
Adjustable shocks allow riders to fine-tune suspension stiffness and rebound to suit their preferences and terrain conditions. Hydraulic disc brakes on both front and rear wheels provide strong, reliable stopping power essential for high-speed riding.
▌Frame and Chassis
– Frame: Steel perimeter frame with reinforced gussets for added strength
– Wheelbase: Approximately 49.6 inches
– Ground Clearance: Around 5.9 inches
– Dry Weight: Approximately 385 lbs (175 kg)
The steel perimeter frame construction ensures a strong, durable chassis capable of withstanding the rigors of aggressive riding and jumps. Its geometry balances stability with agility, delivering responsive handling and confidence-inspiring cornering.
The relatively light weight and compact dimensions make the Banshee highly maneuverable, suitable for technical trail riding and high-speed runs alike.
▌Design and Ergonomics
The 2004 Yamaha Banshee retains the aggressive, iconic styling that has defined the model for decades. Its sharp lines, bold colors (typically Yamaha’s signature blue and white), and muscular stance make it instantly recognizable.
The narrow body and low seat height allow riders to easily shift their weight for control. Wide handlebars provide excellent leverage for precise steering inputs, while the footpeg positioning supports an athletic riding posture, reducing fatigue during long rides.
▌Additional Features
– Exhaust System: Dual tuned expansion chambers designed to optimize power and deliver the classic two-stroke sound
– Cooling System: Radiator with electric fan for effective heat management
– Fuel Tank Capacity: Approximately 2.6 gallons (9.8 liters)
– Instrumentation: Basic analog gauges (tachometer and speedometer, depending on configuration)
– Electrical System: Simple wiring harness primarily for ignition and minimal lighting
The dual expansion chamber exhaust system is crucial for maximizing the two-stroke engine’s performance, enhancing both torque and horsepower while producing the distinctive “bark” sound loved by enthusiasts.
The cooling system, featuring a radiator and electric fan, ensures the engine remains within optimal temperature ranges, even during intense riding or hot weather conditions.
▌Who Should Consider the 2004 Yamaha Banshee 350?
– Experienced Riders: The Banshee’s powerful engine and manual transmission require skill and familiarity with high-performance ATVs.
– Sport and Racing Enthusiasts: Its handling, power, and suspension make it suited for competitive racing and aggressive trail riding.
– Collectors and Enthusiasts: The Banshee’s iconic status and unique engine configuration make it a sought-after model.
– DIY Mechanics: The straightforward mechanical setup and broad aftermarket support appeal to riders who enjoy customizing and tuning their machines.
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