Quick Analysis
Harley Davidson Fat Boy
16.5 pts
Unweighted: 12 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
KTM 390 Adventure
16.0 pts
Unweighted: 10 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | Air-cooled | Liquid Cooled |
| Displacement | 1,923 cc | 398.63 |
| Engine Type | Milwaukee-Eight™ 117 Custom | 4 stroke, Single Cylinder, DOHC, Internal Combustion Engine |
| Power | 103 HP / 77 kW @ 5020 rpm | 46 PS @ 8500 RPM |
| Torque | 168 Nm @ 3000 rpm | 39 Nm @ 6500 RPM |
Performance & Efficiency |
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| Fuel Tank Capacity | 18.9 litres | 14.5 |
| Mileage | 18.18 Kmpl | 30 kmpl |
Dimensions & Weight |
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| Kerb Weight | 315 | 182 |
| Seat Height | 675 | 830 |
Brakes & Suspension |
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| ABS | Dual-channel ABS | Switchable ABS |
| Front Brake | Disc | Disc Front 320 mm 2 Piston |
| Front Suspension | Dual-bending valve 49 mm telescopic with aluminum fork triple clamps, dual rate spring | Adjustable (30 step Damping) - Inverted Telescopic Fork, 43 mm dia (open cartridge), Travel - 230 mm |
| Rear Brake | Disc | Disc Front 240 mm 1 Piston |
| Rear Suspension | Hidden, free piston, coil-over monoshock; 43mm stroke, hydraulic preload adjustment | WP Apex Split Piston, Travel - 230 mm |
Tyres & Wheels |
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| Front Tyre | 160/60 R18 | 90/90-21 |
| Rear Tyre | 240/40 R18 | 140/80-18 |
| Tyre Type | Tubeless | Tubeless |
| Wheel Type | Cast aluminum (Lakester) | Spoke |
Features & Technology |
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| Headlight | LED | LED headlamp |
Other Specifications |
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| Bike Image 1 | https://motoautiv.com/wp-content/uploads/2025/06/Blue.avif | https://motoautiv.com/wp-content/uploads/2025/11/KTM-390-Adventure_White.webp |
| Bike Image 2 | https://motoautiv.com/wp-content/uploads/2025/06/Grey.avif | — |
| Bike Image 3 | https://motoautiv.com/wp-content/uploads/2025/06/Whiskey-fire.avif | — |
| Cluster | Analog with LCD | — |
| Color Options | Billiard Gray | #6B7074 Vivid Black | #0F0F10 Blue Burst | #1E4D8C Whiskey Fire / Vivid Black | #7A2D1B, #0F0F10 | Electronic Orange | #FF5F00 Ceramic White | #F2F2F2, #FF5F00 |
| Cons | The Weight Is Impossible to Ignore – Parking, reversing, or making tight U-turns requires more effort than on most motorcycles. The bike feels considerably lighter once moving, but the weight is always present at low speeds. Not a Motorcycle That Enjoys Tight Corners – The Fat Boy is happiest on flowing roads. When the road becomes tight and twisty, its size and geometry become more noticeable. Wind Hits You Directly at Highway Speeds – Without a fairing or windscreen, long highway rides can become tiring because the rider takes the full force of the wind. Can Feel Warm in Traffic – Sitting in slow-moving traffic on a hot day makes the large V-twin's heat more noticeable around the legs. Passenger Comfort Is Average – The stock setup feels more focused on the rider. For frequent two-up riding, many owners look at accessory seats and backrests. Not Built Around Practicality – There is no meaningful storage space, and carrying luggage usually requires additional accessories. Running Costs Are Higher Than Average – Tyres, servicing, insurance, and genuine accessories can all add up compared to smaller motorcycles. Requires Some Experience to Get the Best Out of It – The combination of weight, engine size, and physical dimensions can feel intimidating for riders who are new to large-capacity cruisers. Floorboards Touch Down Earlier Than You Might Expect – Riders who push harder through corners will eventually find the limits of the cruiser-style setup. | High Seat Height: The tall seat (830 mm or more) may be challenging for shorter riders to handle, especially when off-road. Vibrations: The single-cylinder engine can produce significant vibration at higher RPMs, which might reduce comfort on long rides. Wind Turbulence: Due to the slim fairing and windscreen design, riders can feel wind buffeting at high speeds. Limited Low-End Torque: While power is good, the engine’s torque at very low RPMs can feel a bit lacking, requiring frequent downshifts. Firm Suspension for City Use: The long-travel suspension is optimized for rougher roads but may feel harsh on smooth city streets. Electronics Complexity: With its rich electronics suite, it can be overwhelming for beginners or riders who prefer simplicity; also, more electronic components mean higher maintenance risk. Rear Seat Comfort: The pillion seat and footpeg position may not be very comfortable for long rides or standing on trails. Service Cost: Premium suspension, electronics, and design make its maintenance cost higher than typical commuter bikes. |
| Detailed Overview | Even among Harley-Davidson’s own motorcycles, the Fat Boy has always been difficult to mistake for anything else. The solid-disc Lakester wheels, broad fuel tank, chunky tyres, and low stance give it a silhouette that looks substantial from every angle. While many cruisers rely on chrome and visual complexity to create an impression, the Fat Boy’s design is built around simple, oversized elements that have remained part of its identity for decades. The motorcycle is based on Harley-Davidson’s Softail platform, which uses a hidden rear suspension arrangement beneath the seat area. From the side, the frame still resembles the rigid hardtail cruisers that inspired it, but underneath there is a modern monoshock setup responsible for absorbing road imperfections. The front suspension uses telescopic forks designed to support the motorcycle’s considerable weight while maintaining stability over varying road surfaces. A 1,923cc Milwaukee-Eight 117 V-twin engine sits prominently in the center of the motorcycle. Rather than encouraging riders to explore the upper reaches of the rev range, the engine develops much of its performance lower down, which influences how the Fat Boy behaves in everyday riding. The motorcycle can accelerate with relatively little throttle input, and the six-speed gearbox allows the engine to remain relaxed during highway travel. The large displacement and V-twin configuration are also major contributors to the motorcycle’s mechanical character and riding feel. Dimensionally, the Fat Boy is a substantial machine. Wide tyres at both ends, a long wheelbase, and a low seat height all contribute to its proportions. The low seating position places the rider close to the ground, while forward-mounted foot controls create the stretched riding posture commonly associated with large American cruisers. Combined with the wide handlebar, the rider’s position is very different from what would be experienced on a roadster or sport motorcycle. The Lakester wheels remain one of the defining visual features of the Fat Boy. Unlike conventional alloy wheels, their solid-disc-inspired design creates a unique appearance that has become closely associated with the model over the years. Alongside the broad tyres and muscular bodywork, these wheels play a significant role in shaping the motorcycle’s overall identity. Technology is present, although it is integrated more discreetly than on Harley-Davidson’s touring motorcycles. Modern versions include selectable riding modes, traction control, and ABS, with certain markets also receiving cornering-sensitive rider-assistance systems. Instead of a large touchscreen display, the Fat Boy uses a compact instrument setup focused primarily on essential riding information. An 18.9-litre fuel tank sits above the engine and forms one of the largest visual elements of the motorcycle. Lighting throughout the motorcycle uses LED technology, while the overall design remains intentionally uncluttered. There are few body panels, minimal visual distractions, and a clear emphasis on exposing the mechanical components that define the motorcycle. The Fat Boy’s specifications reveal a motorcycle shaped around traditional cruiser principles: a large-capacity V-twin engine, long-wheelbase chassis, low seating position, and substantial physical presence. Although modern electronics and engineering have been incorporated over time, the underlying layout remains closely tied to the formula that has defined the model for decades. | The KTM 390 Adventure is a refined mid-sized adventure bike that skillfully balances on-road usability with real off-road capability, making it appealing for both everyday commuters and weekend explorers. The 2025 generation brings significant upgrades, including a more powerful 398.6-cc LC4c single-cylinder engine, which produces about 46 PS at 8,500 rpm and 39 Nm of torque at 6,500 rpm. This increase in displacement over its predecessor provides smoother power delivery, better low-end grunt, and added reserve for spirited riding. One of the biggest draws of the 390 Adventure is its chassis and suspension setup, which is built to handle a variety of surfaces. It now runs on a 21-inch front wheel and 17-inch rear wheel, both spoke-tubed, which improves its off-road capability. The front suspension is handled by WP APEX 43 mm USD forks with 200 mm of travel, while the rear gets a monoshock with 205 mm of travel, offering impressive compliance and control over rough terrain. Ground clearance has also been raised to 227 mm, giving it a more aggressive off-road stance. Despite its off-road chops, the 390 Adventure remains comfortable for everyday commuting and long-distance touring. Its seat height is lowered to 830 mm, making it more accessible for a wider range of riders. The ergonomic design includes an upright riding position, wide handlebars, and a well-padded seat, allowing for hours in the saddle without too much fatigue. Fuel capacity is 14.5 liters, which, when combined with its efficiency, gives it an impressive practical range — many riders estimate over 300 km on a full tank. Electronics are a highlight for this model. The 390 Adventure comes loaded with cornering ABS, switchable off-road ABS, traction control (MTC), ride-by-wire throttle, and several riding modes (such as Street, Rain, Off-road). It also includes a bi-directional quickshifter and slipper-assist clutch, making gear changes smoother and more seamless. The instrument cluster is a bright, 5-inch TFT display with Bluetooth connectivity via KTM MY RIDE, allowing for turn-by-turn navigation, call alerts, and music control. On the road, the 390 Adventure excels with its agile frame and manageable weight (kerb weight is about 182 kg per KTM’s 2025 spec sheet), which contribute to confidence in both urban traffic and fast highway runs. The power delivery is linear yet responsive, making overtakes easy and enjoyable. Off-road, the bike’s long-travel suspension, tall wheels, and electronic aids allow it to tackle gravel, dirt trails, and light terrain with surprising competence. That said, there are some trade-offs. The fuel efficiency on real-world rides can be lower than claimed, especially when pushing hard or riding in mixed terrain: in a Team-BHP test, the observed economy dipped to ~20 km/l under aggressive or mixed usage. Also, some riders note that the seat could benefit from softer padding for very long rides, and wind protection is moderate despite the adjustable windscreen. In summary, the KTM 390 Adventure is a well-rounded and highly capable machine for riders who want an accessible, lightweight ADV that doesn’t compromise on performance or electronics. Whether you’re doing daily commuting, touring through highways, or exploring off-road trails, this bike gives you a compelling mix of versatility, modern tech, and genuine adventure DNA — all wrapped up in KTM’s signature ‘Ready to Race’ spirit. |
| Expert Review | The Fat Boy has always been a motorcycle that prioritizes presence as much as performance. Even by cruiser standards, it feels substantial, whether you're looking at it parked or riding it down the road. The Milwaukee-Eight 117 engine suits the character of the bike perfectly, producing the kind of effortless torque that allows you to ride without constantly thinking about gear selection or engine speed. What stands out most is how planted the motorcycle feels once it's moving. The wide tyres, long wheelbase, and considerable weight create a sense of stability that encourages a relaxed riding style rather than an aggressive one. At the same time, those same traits mean the Fat Boy asks for a bit more effort in slow-speed situations and doesn't feel particularly eager when the road becomes tight and technical. The riding experience is less about chasing performance figures and more about the way the motorcycle delivers its power, carries its weight, and settles into a steady rhythm on open roads. Modern electronics have improved safety and usability, but they remain secondary to the traditional cruiser character that continues to define the Fat Boy., 4.4, MotoAutiv Team | The KTM 390 Adventure is powered by a 399cc single-cylinder, liquid-cooled engine producing around 43–45 bhp and 37 Nm, paired with a 6-speed gearbox along with a slipper clutch and quickshifter. The engine delivers strong mid-range performance and builds speed quickly, making highway riding feel effortless, while in city conditions it needs more gear shifts to stay smooth. It uses a steel trellis frame with long-travel suspension, including USD forks at the front and a monoshock at the rear, tuned more towards stability than softness, which works well on highways but can feel slightly firm on sharp bumps. The upright riding position, wide handlebar, and tall seat height (around 830–855 mm) give it a commanding stance, though shorter riders may find it difficult in traffic. Braking is handled by disc brakes with cornering ABS, offering controlled stopping performance. The bike also comes with features like traction control, riding modes, ride-by-wire throttle, and a TFT display with connectivity, while a 14.5-litre fuel tank, LED lighting, and windscreen support longer rides and varying road conditions., 4.4, MotoAutiv Team |
| FAQ (Manual Override) | Q: What type of motorcycle is the Harley-Davidson Fat Boy? A: The Fat Boy is classified as a heavyweight cruiser motorcycle, designed around relaxed riding ergonomics, a large V-twin engine, and long-distance road comfort. Q: Which engine powers the Fat Boy? A: The latest model uses the Milwaukee-Eight 117 V-twin engine paired with a 6-speed gearbox. Q: Is the Fat Boy suitable for long-distance rides? A: Yes. The relaxed ergonomics and torque-rich engine make it capable of covering long distances, although many owners add touring accessories for greater comfort. Q: What is the seat height of the Fat Boy? A: The seat height is approximately 675 mm, making it accessible to a wide range of riders. Q: Does the Fat Boy have cruise control? A: Availability depends on market and model year. Some versions include cruise control, while others may offer it as an accessory. Q: What is the fuel tank capacity of the Fat Boy? A: The motorcycle is equipped with an 18.9-litre fuel tank. Q: Does the Fat Boy have riding modes? A: Yes. Modern versions include selectable riding modes and electronic rider-assistance systems. Q: Is the Fat Boy comfortable for a passenger? A: Occasional two-up riding is possible, but the stock setup is more rider-focused than dedicated touring motorcycles. Q: How is the Fat Boy different from the Breakout? A: The Fat Boy focuses on a broad, muscular cruiser character with solid-disc wheels, while the Breakout adopts a stretched custom-cruiser design with a much wider rear tyre. Q: Does the Fat Boy have traction control and ABS? A: Yes. Modern versions include ABS, traction control, and other rider-assistance technologies. Q: What is the kerb weight of the Harley-Davidson Fat Boy? A: The motorcycle weighs approximately 315 kg in running condition, depending on market specification. Q: Is the Fat Boy beginner-friendly? A: The low seat height helps with accessibility, but the weight, engine size, and overall dimensions make it better suited to riders with some experience. Q: Does the Fat Boy support smartphone connectivity? A: The Fat Boy uses a relatively simple instrumentation setup compared to Harley's touring models, so smartphone integration is limited. Q: What body type does the Fat Boy belong to? A: It is categorized as a cruiser motorcycle, specifically a heavyweight cruiser designed around comfort, torque delivery, and road presence. | Q: What is the engine capacity, power & torque of the KTM 390 Adventure? A: The KTM 390 Adventure has a 373.2 cc single-cylinder, liquid-cooled engine. In newer or updated versions, the displacement is ~398.6 cc, producing 46 PS and 39 Nm of torque. Q: What kind of transmission does KTM 390 Adventure use? A: The bike uses a 6-speed gearbox. Q: What’s the fuel tank capacity and how much fuel can KTM 390 Adventure carry? A: The 390 Adventure has a 14.5-litre fuel tank. Q: What is the seat height & ground clearance of KTM 390 Adventure? A: The standard seat height is 830 mm (or 855 mm on some variants) per the spec sheet. The ground clearance is about 200 mm. Q: What suspension setup does the 390 Adventure have? A: It is equipped with WP APEX 43 mm USD front forks and a WP APEX monoshock at the rear. Q: What are the braking systems and ABS features available in KTM 390 Adventure? A: The bike uses 320 mm front disc and 230 mm rear disc. For safety, it comes with cornering ABS and off-road ABS mode. Q: What rider aids / electronics does the 390 Adventure come with? A: It features motorcycle traction control (MTC) with a 3D IMU, switchable ABS, a ride-by-wire throttle, and riding modes. Bajaj Auto It also has a slipper-assist clutch. Q: What kind of instrument cluster is fitted on the 390 Adventure? A: The bike comes with a 5-inch TFT display that shows information like speed, trip, fuel, gear position, and more. Q: Is the 390 Adventure suitable for touring and off-road use? A: Yes, with its long-travel suspension (170 mm front, 177 mm rear), decent ground clearance, and off-road ABS mode, it is designed to handle light to moderate off-road trails as well as long touring trips. Q: What is the kerb weight of the KTM 390 Adventure? A: The kerb (or wet) weight is around 183 kg according to Autocar India. Q: What is the mileage (fuel efficiency) of the 390 Adventure? A: According to Autocar India, the 390 Adventure’s claimed mileage is around 30 km/l. Some real-world riders report similar or slightly varied fuel efficiency. |
| Fuel System | Fuel Injection | Fuel Injection |
| Price Variants | STD | 2803000 | R | 378405 STD | 397235 |
| Pros | Instantly Recognizable Design – Few motorcycles are as easy to identify from a distance as the Fat Boy. The solid-disc wheels, wide stance, and muscular proportions give it a presence that stands out even among other cruisers. Torque-Rich Engine Character – The Milwaukee-Eight 117 doesn't need to be revved hard to make progress. A small twist of the throttle is usually enough to get the bike moving with very little effort. Relaxed Riding Position – The low seat, wide handlebar, and stretched-out foot controls create a laid-back riding posture that suits cruising and long hours in the saddle. Feels Stable on Open Roads – Once the bike is moving, its weight starts working in its favour. It feels planted at highway speeds and doesn't get unsettled easily. High-Quality Finish – From the paintwork to the chrome detailing and metal components, the overall fit and finish reflects the premium nature of the motorcycle. Low Seat Height Helps at Stops – Despite being a large motorcycle, the low seat makes it easier for many riders to place both feet firmly on the ground. Modern Electronics Without Changing the Character – Features such as ABS, traction control, and riding modes work in the background without taking away from the traditional cruiser feel. Comfortable Engine for Cruising – The engine settles into a relaxed rhythm at highway speeds and rarely feels stressed during normal riding. | Excellent Power-to-Weight Ratio: Its 373 cc engine delivers strong performance while keeping the bike relatively light, ideal for both touring and trails. Advanced Electronics Suite: Equipped with features like traction control, cornering ABS, quickshifter, and ride modes, a very modern setup. Long-Travel Suspension: WP APEX USD forks and a quality monoshock offer good suspension travel and ride comfort on rough terrain. High Ground Clearance: Good off-road capability thanks to its significant ground clearance (around 200 mm). Off-Road-Friendly Braking: Supermoto ABS mode lets you lock the rear wheel slightly helpful on dirt or gravel. Long Range for Touring: A reasonably large fuel tank combined with good fuel efficiency enables long-distance road trips. Comfortable Ergonomics: Upright seating, tall handlebars, and good seat height make it comfortable for long rides and standing on trails. Strong Build Quality: Solid trellis frame and quality components make the bike robust and durable for adventure use. |
| Starter | Electric | Self Start Only |
| Transmission | 6-speed manual | 6 Speed Manual |
