The 2004 Triumph Bonneville is a modern classic motorcycle, celebrating its iconic heritage with a parallel-twin engine. This naked bike has been produced for many years, with the 2004 model being part of the popular T100 and standard Bonneville trims. It stands out for its timeless styling, approachable performance, and the authentic British motorcycle experience it offers, making it a favorite among riders seeking character and usability.
The Good
The 2004 Bonneville offers a charming blend of classic design and user-friendly performance. Its accessible nature, comfortable riding position, and reliable parallel-twin engine appeal to both seasoned riders and newcomers, providing an emotional connection to its heritage with practical everyday usability.
The Bad
While generally well-regarded, potential buyers of the 2004 Bonneville should watch for the occasional carburetor tuning issues and the possibility of oil leaks from the engine cases or shifter seal, especially on higher-mileage examples. Some owners have also reported minor electrical gremlins.
2004 Triumph Bonneville: Quick Overview
- Engine Options: The 2004 Triumph Bonneville primarily featured a 790cc, air-cooled, DOHC, parallel-twin engine.
- Horsepower: Approximately 62 horsepower at 7,400 rpm.
- Torque: Around 60 lb-ft at 5,800 rpm.
- Fuel Economy: Typically in the range of 45-55 mpg (miles per gallon), depending on riding style and conditions.
- 0-60 mph Times: Generally in the mid-to-high 4-second range, offering brisk acceleration for its class.
- Towing Capacity: Not applicable; this is a motorcycle designed for solo or passenger riding, not for towing.
- Trim-Level Features:
Standard Bonneville: Featured a more minimalist aesthetic, classic spoke wheels, a two-up seat, and a single front disc brake. Available in solid color schemes.
Bonneville T100: A more premium offering, the T100 typically included more chrome accents, a two-tone paint scheme, often a center stand, a tachometer, and sometimes upgraded suspension components. It aimed to evoke the spirit of the original Triumph Bonneville models from the 1960s. Both trims shared the same core engine and chassis platform but differed in styling details and some accessories, offering a choice between a simpler, classic look and a more adorned, retro-inspired appearance.
2004 Triumph Bonneville Specifications
Vehicle Information
| Year | 2004 |
| Make | Triumph |
| Model | Bonneville |
| Trim | - |
| Style | - |
| Type | Motorcycle |
| Category | Motorcycle |
Manufacturing Details
| Made In | United Kingdom |
| Manufacturing City | HINCKLEY |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 800CC |
| Engine Size | 800L |
| Engine Cylinders | 2 |
| 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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Analysis
What Problems Does the 2004 Triumph Bonneville Have?
The 2004 Triumph Bonneville, like many motorcycles of its era, has a few common areas that owners report needing attention. One frequently mentioned issue is related to the carburetors, specifically the stock Keihin CVK units. Owners sometimes report the need for regular cleaning and adjustment to maintain smooth running, especially if the bike has sat for extended periods or if it wasn't stored properly. Incorrect jetting or vacuum leaks can lead to poor idling, hesitation, or a bogging sensation during acceleration.
Another point of concern, though not widespread, can be the potential for oil leaks. These are often minor and can occur around the shifter seal or from the engine crankcases. Regular inspection and tightening of fasteners, along with ensuring proper gasket seating during maintenance, can mitigate this.
Electrical gremlins, while not a major epidemic, do pop up in owner forums. This can range from a faulty neutral indicator light to issues with the charging system if the regulator/rectifier starts to fail. These are typically repairable with replacement parts.
Regarding recalls, it's always advisable to check with Triumph or a dealer using the bike's VIN for any outstanding recalls that may have been issued for the 2004 model year. However, generally speaking, the 2004 Bonneville is considered a robust and reliable motorcycle when properly maintained. The parallel-twin engine is known for its durability, and many owners report thousands of trouble-free miles. Long-term reliability largely hinges on consistent oil changes, valve adjustments at recommended intervals, and keeping the carburetors in good tune. The frame and suspension are generally solid, with wear and tear on the latter being more common than inherent design flaws.
Another point of concern, though not widespread, can be the potential for oil leaks. These are often minor and can occur around the shifter seal or from the engine crankcases. Regular inspection and tightening of fasteners, along with ensuring proper gasket seating during maintenance, can mitigate this.
Electrical gremlins, while not a major epidemic, do pop up in owner forums. This can range from a faulty neutral indicator light to issues with the charging system if the regulator/rectifier starts to fail. These are typically repairable with replacement parts.
Regarding recalls, it's always advisable to check with Triumph or a dealer using the bike's VIN for any outstanding recalls that may have been issued for the 2004 model year. However, generally speaking, the 2004 Bonneville is considered a robust and reliable motorcycle when properly maintained. The parallel-twin engine is known for its durability, and many owners report thousands of trouble-free miles. Long-term reliability largely hinges on consistent oil changes, valve adjustments at recommended intervals, and keeping the carburetors in good tune. The frame and suspension are generally solid, with wear and tear on the latter being more common than inherent design flaws.
How long will the 2004 Triumph Bonneville last?
Based on owner data and typical maintenance habits, a well-cared-for 2004 Triumph Bonneville can comfortably achieve 50,000 to 100,000 miles or more. The parallel-twin engine is inherently robust and designed for longevity. Owners who perform regular oil changes, adjust valves at the recommended intervals, and keep the carburetors clean and synchronized will see the greatest durability. Weaknesses that can emerge over time include wear on suspension components (shocks and fork seals) and the potential for minor oil leaks from engine seals or gaskets. The electrical system, particularly the regulator/rectifier, can be a point of failure on older bikes, but this is often a straightforward replacement. Overall, the 2004 Bonneville demonstrates good long-term durability when treated with consistent maintenance.
What Technology & Safety Features are Included?
The 2004 Triumph Bonneville is a motorcycle that proudly embraces its retro roots, and as such, its technology, entertainment, and safety features are intentionally minimalistic. Built-in tech is primarily focused on the essential functions of riding. It features a clear, analog speedometer and tachometer, providing all the necessary information at a glance. A basic odometer and trip meter are standard. There are no advanced electronic rider aids like ABS (Anti-lock Braking System), traction control, or ride modes, which were uncommon on most motorcycles of this style and era. Entertainment is delivered through the visceral experience of riding, the exhaust note, and the connection to the road, rather than any integrated audio systems.
Safety features are primarily passive and rely on good mechanicals and rider awareness. The braking system typically consists of a single disc brake at the front and a rear drum or disc brake, providing adequate stopping power for its performance capabilities. Lighting is standard, with a halogen headlight, taillight, and turn signals. Optional features that might have been available or added by owners could include engine guards for protection in case of a drop, a fly screen for a modest reduction in windblast, or aftermarket exhaust systems for a different sound profile.
Crash-test ratings are not typically available for motorcycles in the same way they are for cars. Safety is judged more on the motorcycle's handling characteristics, braking performance, and the rider's skill and protective gear. The Bonneville's predictable handling and manageable power output contribute to its overall safety profile for its intended use as a classic-style roadster. The focus is on a pure riding experience, foregoing modern electronic interventions for a more direct connection to the machine and the road.
Safety features are primarily passive and rely on good mechanicals and rider awareness. The braking system typically consists of a single disc brake at the front and a rear drum or disc brake, providing adequate stopping power for its performance capabilities. Lighting is standard, with a halogen headlight, taillight, and turn signals. Optional features that might have been available or added by owners could include engine guards for protection in case of a drop, a fly screen for a modest reduction in windblast, or aftermarket exhaust systems for a different sound profile.
Crash-test ratings are not typically available for motorcycles in the same way they are for cars. Safety is judged more on the motorcycle's handling characteristics, braking performance, and the rider's skill and protective gear. The Bonneville's predictable handling and manageable power output contribute to its overall safety profile for its intended use as a classic-style roadster. The focus is on a pure riding experience, foregoing modern electronic interventions for a more direct connection to the machine and the road.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
2004 Triumph Bonneville Prices and Market Value
When new, the 2004 Triumph Bonneville typically retailed in the United States for a price range of approximately $7,000 to $8,000, depending on the specific trim level (standard Bonneville versus the T100) and any factory options. As a used vehicle, prices for a 2004 Triumph Bonneville can vary significantly. Expect to see them listed from around $3,500 to $6,500, with lower prices for bikes with higher mileage or those needing some cosmetic or mechanical attention, and higher prices for well-maintained, low-mileage examples, especially the T100 models. Depreciation has been moderate for the Bonneville; it holds its value reasonably well due to its timeless design and dedicated following. Factors affecting resale value include overall condition, mileage, maintenance history, originality of parts, and the presence of desirable aftermarket modifications or accessories. A clean, original bike with complete service records will always command a premium.
2004 Triumph Bonneville Cost of Ownership
Owning a 2004 Triumph Bonneville is generally considered economical. Insurance costs are typically moderate, falling between basic commuter bikes and high-performance sportbikes. Fuel economy is excellent, often in the 45-55 mpg range, making it affordable to run. Routine maintenance, including oil changes and chain lubrication, is straightforward and can be done by owners with basic mechanical skills, keeping costs down. Major repairs are infrequent on well-maintained examples. While parts can sometimes be pricier than for mass-market Japanese bikes, the overall long-term ownership cost is reasonable, making it an economical choice for riders who appreciate its classic charm and British heritage.
2004 Triumph Bonneville Fuel Efficiency
Fuel Type
-
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2004 Triumph Bonneville Recalls & Defects
Suspension:rear
Recall date
2004-10-14
Recall no.
04v496000
Source
NHTSA
Summary
ON Certain Motorcycles, There MAY BE A Poor Weld ON THE Rear Suspension Unit Body.
Consequence
Failure OF THE Rear Suspension Unit MAY Compromise THE Stability OF THE Motorcycle Which Could Result IN A Crash.
Remedy
Dealers Will Replace THE Rear Suspension Units. THE Recall Began ON December 20, 2004. Owners Should Contact Triumph AT 1-678-854-2010.
Notes
Customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
2004 Triumph Bonneville 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 Triumph Bonneville Insurance
Insurance for a 2004 Triumph Bonneville is moderately priced, reflecting its status as a Motorcycle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2004 Triumph Bonneville Compare to Other Motorcycle?
The 2004 Triumph Bonneville competes in the retro-standard or classic motorcycle segment. Its key rivals at the time included the Moto Guzzi V7 Classic (though the V7 revival was a bit later, it represents a similar spirit), the Royal Enfield Bullet (a much simpler, lower-performance option), and various Japanese offerings like the Honda CB series (which often leaned more towards sporty standards) or older UJM (Universal Japanese Motorcycle) models.
Performance: The Bonneville's 790cc parallel-twin offered a good balance of accessible power and character, with around 62 hp. Rivals like the Moto Guzzi might offer more torque and unique character from their transverse V-twin, while Japanese bikes could offer more outright horsepower or sharper handling. The Royal Enfield would be significantly less powerful and more basic.
Features: The Bonneville's features are centered around its classic aesthetic – analog gauges, simple controls, and a comfortable riding position. It eschews modern electronics. Rivals might offer similar simplicity or, in the case of some Japanese bikes, slightly more modern features like disc brakes all around or better suspension components. However, the Bonneville's charm is in its understated elegance.
Reliability: Triumph's parallel-twin engine is generally considered reliable, though it requires diligent maintenance, especially regarding carb tuning and potential minor oil leaks. Moto Guzzi has its own unique reliability quirks, often related to its shaft drive and engines. Royal Enfields historically have a reputation for being mechanically simple but requiring frequent attention. Many Japanese bikes from this era are known for bulletproof reliability.
Price: The 2004 Bonneville was competitively priced within its segment, offering a premium feel over some entry-level classics. Used prices for the 2004 Bonneville are generally in the $3,500-$6,500 range. Similar classic-style bikes from rivals can be found in comparable price brackets, though specific models and conditions will vary.
Alternatives:
If you seek more modern performance and handling while retaining a classic look, consider later model Triumph Bonneville variants (e.g., fuel-injected models) or the Ducati GT1000 (though often more expensive). For pure simplicity and a very relaxed ride, a Royal Enfield offers a very different, more rustic experience. The Kawasaki W650, if you can find one, is a fantastic air-cooled parallel-twin with a similar retro appeal and strong reliability. For a more European flavour with character, a used Moto Guzzi V7 Stone or Classic is worth considering.
Performance: The Bonneville's 790cc parallel-twin offered a good balance of accessible power and character, with around 62 hp. Rivals like the Moto Guzzi might offer more torque and unique character from their transverse V-twin, while Japanese bikes could offer more outright horsepower or sharper handling. The Royal Enfield would be significantly less powerful and more basic.
Features: The Bonneville's features are centered around its classic aesthetic – analog gauges, simple controls, and a comfortable riding position. It eschews modern electronics. Rivals might offer similar simplicity or, in the case of some Japanese bikes, slightly more modern features like disc brakes all around or better suspension components. However, the Bonneville's charm is in its understated elegance.
Reliability: Triumph's parallel-twin engine is generally considered reliable, though it requires diligent maintenance, especially regarding carb tuning and potential minor oil leaks. Moto Guzzi has its own unique reliability quirks, often related to its shaft drive and engines. Royal Enfields historically have a reputation for being mechanically simple but requiring frequent attention. Many Japanese bikes from this era are known for bulletproof reliability.
Price: The 2004 Bonneville was competitively priced within its segment, offering a premium feel over some entry-level classics. Used prices for the 2004 Bonneville are generally in the $3,500-$6,500 range. Similar classic-style bikes from rivals can be found in comparable price brackets, though specific models and conditions will vary.
Alternatives:
If you seek more modern performance and handling while retaining a classic look, consider later model Triumph Bonneville variants (e.g., fuel-injected models) or the Ducati GT1000 (though often more expensive). For pure simplicity and a very relaxed ride, a Royal Enfield offers a very different, more rustic experience. The Kawasaki W650, if you can find one, is a fantastic air-cooled parallel-twin with a similar retro appeal and strong reliability. For a more European flavour with character, a used Moto Guzzi V7 Stone or Classic is worth considering.
Final Verdict: Is the 2004 Triumph Bonneville a Good Motorcycle?
The 2004 Triumph Bonneville is ideal for riders who appreciate timeless British styling, a characterful engine, and a relaxed, engaging riding experience. It's perfect for casual cruising, weekend rides, and commuting, especially for those who value aesthetics and a connection to motorcycle heritage over outright performance or cutting-edge technology. It's a great choice for newer riders seeking an approachable yet stylish machine, or for experienced riders looking for a comfortable, classic alternative to more aggressive bikes.
This motorcycle is absolutely worth buying, especially on the used market. Given its age, buying used is the only option, and it represents excellent value. Look for well-maintained examples, particularly the T100 trim if you prefer the added styling touches and chrome. Thoroughly inspect for any signs of neglect, particularly regarding the carburetors and potential oil leaks. With diligent maintenance, the 2004 Bonneville can provide many years of enjoyable riding and continues to be a desirable classic motorcycle.
This motorcycle is absolutely worth buying, especially on the used market. Given its age, buying used is the only option, and it represents excellent value. Look for well-maintained examples, particularly the T100 trim if you prefer the added styling touches and chrome. Thoroughly inspect for any signs of neglect, particularly regarding the carburetors and potential oil leaks. With diligent maintenance, the 2004 Bonneville can provide many years of enjoyable riding and continues to be a desirable classic motorcycle.
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.