The 2004 Yamaha YFZ450 marked Yamaha's entry into the high-performance 450cc sport ATV market. This four-wheeler boasts a race-ready body style, designed for aggressive riding. While the YFZ450 has seen many model years, the 2004 model is significant. Typically, it's only available in one trim. Originally priced around $6,799, its aggressive engine and sharp handling set it apart, making it a popular choice for racers and enthusiasts alike.
The Good
The 2004 Yamaha YFZ450 delivers exhilarating performance with its potent 450cc engine. Its sharp handling inspires confidence. The durable engine builds reliability. Practical buyers appreciate its robust construction and relatively simple maintenance. Emotionally, the YFZ450 offers thrilling speed and sporty aesthetics.
The Bad
The 2004 Yamaha YFZ450 is known for its aggressive nature, which can make it less forgiving for novice riders. The carburetor can be finicky and require regular adjustment. Watch out for worn suspension components and potential engine wear due to its high-performance design. Regular maintenance is crucial.
2004 Yamaha YFZ450: Quick Overview
- Engine: 449cc liquid-cooled, 5-valve, DOHC 4-stroke
- Engine Type: Single Cylinder
- Bore x Stroke: 95.0 x 63.4mm
- Compression Ratio: 11.5:1
- Fuel System: Keihin 39mm FCR carburetor with throttle position sensor (TPS)
- Ignition: CDI
- Starting System: Electric
- Transmission: 5-speed manual with reverse
- Final Drive: Chain
- Horsepower: Approximately 43-45 hp (factory estimate, can vary)
- Fuel Economy: Not officially rated; expect around 20-25 mpg depending on riding conditions
- 0-60 mph: Approximately 5-6 seconds (estimated, depends on rider and surface)
- Towing Capacity: Not applicable; designed as a sport ATV, not for towing
- Suspension Front: Independent double wishbone, 9.1 inches of travel
- Suspension Rear: Swingarm, 10.6 inches of travel
- Brakes Front: Dual hydraulic discs
- Brakes Rear: Hydraulic disc
- Tires Front: 21x7-10
- Tires Rear: 20x10-9
- Dry Weight: Approximately 375 lbs
- Fuel Capacity: 2.6 gallons
- Trim Levels: Only one main trim available for 2004; special editions might have different color schemes or graphics.
2004 Yamaha YFZ450 Specifications
Vehicle Information
| Year | 2004 |
| Make | Yamaha |
| Model | YFZ450 |
| Trim | - |
| Style | - |
| Type | Motorcycle |
| Category | Low Speed Vehicle |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | KAKEGAWA |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 439CC |
| Engine Size | 439L |
| Engine Cylinders | 1 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | - |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2004 Yamaha YFZ450 Have?
The 2004 Yamaha YFZ450, while generally reliable, has some frequently reported issues. Carburetor tuning is a common concern; the Keihin FCR carburetor can be sensitive to altitude and temperature changes, leading to difficult starting and poor performance if not properly jetted. Valve issues, particularly with the exhaust valves, have also been reported. Check valve clearances regularly to prevent damage. The water pump seals are another potential weak point, with some owners experiencing coolant leaks.
Early models (including 2004) had some reports of frame cracking near the steering stem after hard use, so inspect the frame carefully, especially in that area. The rear swingarm bearings can also wear out relatively quickly, leading to play and requiring replacement. Some owners have also reported issues with the electric starter, although this is less common.
While recalls specifically for the 2004 model are rare, it's always wise to check the National Highway Traffic Safety Administration (NHTSA) website for any applicable recalls based on the VIN. Long-term reliability hinges on diligent maintenance, including regular oil changes, air filter cleaning, and valve adjustments.
Early models (including 2004) had some reports of frame cracking near the steering stem after hard use, so inspect the frame carefully, especially in that area. The rear swingarm bearings can also wear out relatively quickly, leading to play and requiring replacement. Some owners have also reported issues with the electric starter, although this is less common.
While recalls specifically for the 2004 model are rare, it's always wise to check the National Highway Traffic Safety Administration (NHTSA) website for any applicable recalls based on the VIN. Long-term reliability hinges on diligent maintenance, including regular oil changes, air filter cleaning, and valve adjustments.
How long will the 2004 Yamaha YFZ450 last?
Estimating mileage for an ATV is difficult since they aren't typically equipped with odometers; years of service are a better metric. With proper maintenance, a 2004 Yamaha YFZ450 can easily last 15-20+ years. Expect engine rebuilds around 5-7 years or sooner with heavy use/racing. Long-term durability depends heavily on maintenance habits. Neglecting oil changes or ignoring valve adjustments will significantly shorten its lifespan. Watch for wear in suspension components (bushings, bearings) and potential frame fatigue over time. Proper storage during off-seasons is also crucial to prevent rust and component degradation.
What Technology & Safety Features are Included?
The 2004 Yamaha YFZ450 is a sport ATV focused on performance, so it lacks many of the tech, entertainment, and driver-assistance features found in modern vehicles. It has basic instrumentation consisting of indicator lights for neutral, reverse, and oil level. There's no built-in entertainment system, GPS navigation, or advanced rider aids.
Safety features are similarly basic. It relies on the rider's skill and protective gear. Standard safety features include hydraulic disc brakes for stopping power and a tethered kill switch (although many owners might remove this). There are no electronic stability control, anti-lock brakes, or airbags.
Optional features are primarily aftermarket upgrades focused on performance enhancement, such as exhaust systems, carburetors, suspension components, and protective guards.
Crash test ratings are not available for ATVs as they are not subject to the same safety regulations as cars and motorcycles. Rider safety depends heavily on wearing appropriate protective gear, including a helmet, goggles, gloves, and boots. Proper training and responsible riding habits are also crucial.
Safety features are similarly basic. It relies on the rider's skill and protective gear. Standard safety features include hydraulic disc brakes for stopping power and a tethered kill switch (although many owners might remove this). There are no electronic stability control, anti-lock brakes, or airbags.
Optional features are primarily aftermarket upgrades focused on performance enhancement, such as exhaust systems, carburetors, suspension components, and protective guards.
Crash test ratings are not available for ATVs as they are not subject to the same safety regulations as cars and motorcycles. Rider safety depends heavily on wearing appropriate protective gear, including a helmet, goggles, gloves, and boots. Proper training and responsible riding habits are also crucial.
What Colors Options are Available?
Exterior Colors
Yamaha Blue
White
Black
2004 Yamaha YFZ450 Prices and Market Value
The 2004 Yamaha YFZ450 had an original MSRP of approximately $6,799. Used market prices today range from $2,000 to $4,000, depending on condition, location, and modifications. Depreciation is significant, but well-maintained models hold their value relatively well. Factors affecting resale value include: overall condition, engine health, aftermarket modifications (some add value, others detract), and the presence of original parts. Demand for classic sport ATVs also plays a role; limited production numbers increase collectibility and resale value.
2004 Yamaha YFZ450 Cost of Ownership
Insurance costs for a 2004 Yamaha YFZ450 are generally affordable, but vary based on coverage level and location. Fuel costs depend on usage; expect moderate fuel consumption during recreational riding or racing. Maintenance, including oil changes, air filter cleaning, and valve adjustments, is crucial and adds to the cost. Repairs can be expensive, especially engine or transmission work. Long-term ownership costs are moderate, leaning towards costly if neglected. Overall, owning a YFZ450 is more expensive than a utility ATV due to its high-performance nature.
2004 Yamaha YFZ450 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2004 Yamaha YFZ450 Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
2004 Yamaha YFZ450 Insurance
Insurance for a 2004 Yamaha YFZ450 is moderately priced, reflecting its status as a Motorcycle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2004 Yamaha YFZ450 Compare to Other Motorcycle?
The 2004 Yamaha YFZ450 competed primarily with the Honda TRX450R and the Suzuki LT-Z400 (Z400). In terms of performance, the YFZ450 offered a potent engine and sharp handling, giving it a competitive edge. The Honda TRX450R was known for its robust engine and build quality. The Suzuki Z400 offered a more user-friendly engine and lower price point, making it a great entry-level sport ATV.
Regarding features, all three were relatively basic, focusing on performance rather than tech amenities. The YFZ450 and TRX450R were considered more race-ready out of the box compared to the Z400.
In terms of reliability, all three were generally reliable, but the YFZ450 required more frequent maintenance due to its high-performance design. The TRX450R was often praised for its bulletproof engine.
For a similar alternative, the Honda TRX450R is an excellent choice if reliability is a top priority. The Suzuki LT-Z400 is a better option for beginners or those on a tighter budget who want a more forgiving ride. The Kawasaki KFX450R, introduced later, also offered a competitive package. Whether these alternatives are "better" depends on the rider's specific needs and priorities.
Regarding features, all three were relatively basic, focusing on performance rather than tech amenities. The YFZ450 and TRX450R were considered more race-ready out of the box compared to the Z400.
In terms of reliability, all three were generally reliable, but the YFZ450 required more frequent maintenance due to its high-performance design. The TRX450R was often praised for its bulletproof engine.
For a similar alternative, the Honda TRX450R is an excellent choice if reliability is a top priority. The Suzuki LT-Z400 is a better option for beginners or those on a tighter budget who want a more forgiving ride. The Kawasaki KFX450R, introduced later, also offered a competitive package. Whether these alternatives are "better" depends on the rider's specific needs and priorities.
Final Verdict: Is the 2004 Yamaha YFZ450 a Good Motorcycle?
The 2004 Yamaha YFZ450 is ideal for experienced riders seeking a thrilling and competitive sport ATV. It's a solid choice for those comfortable with regular maintenance and carburetor tuning. Whether it's worth buying depends on the condition of the specific unit. Buying used is the only option, as new models are not available. Look for a well-maintained machine with documented service history and no signs of frame damage. Avoid heavily modified ATVs unless you know the quality of the modifications. If you are a beginner or prioritize low maintenance, consider a different model.
Simon A
Simon is a contributor to VinCheck, where he provides articles and reviews on various automotive topics. His work focuses on delivering accurate and up-to-date information about used cars, helping readers make informed decisions.