Quick Analysis
Harley Davidson Fat Boy
14.0 pts
Unweighted: 9 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
KTM RC 390
12.5 pts
Unweighted: 9 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | Air-cooled | Liquid cooling. Curved radiator with fans for better heat management |
| Displacement | 1,923 cc | 373.27 cc |
| Engine Type | Milwaukee-Eight™ 117 Custom | Single Cylinder, Liquid Cooled, DOHC, FI Engine |
| Power | 103 HP / 77 kW @ 5020 rpm | 43.5 PS @ 9000 rpm |
| Torque | 168 Nm @ 3000 rpm | 37 Nm @ 7000 rpm |
Performance & Efficiency |
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| Fuel Tank Capacity | 18.9 litres | 13.7 L |
| Mileage | 18.18 Kmpl | 29 kmpl |
Dimensions & Weight |
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| Kerb Weight | 315 | 172 |
| Seat Height | 675 | 835 |
Brakes & Suspension |
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| ABS | Dual-channel ABS | Dual Channel ABS |
| Front Brake | Disc | 320 mm Disc with Radially mounted calliper |
| Front Suspension | Dual-bending valve 49 mm telescopic with aluminum fork triple clamps, dual rate spring | WP APEX USD forks, 43 mm diameter |
| Rear Brake | Disc | 230 mm Disc with Floating calliper |
| Rear Suspension | Hidden, free piston, coil-over monoshock; 43mm stroke, hydraulic preload adjustment | WP APEX Monoshock, 10 step adjustable |
Tyres & Wheels |
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| Front Tyre | 160/60 R18 | 110/70 - 17 |
| Rear Tyre | 240/40 R18 | 150/60 - 17 |
| Tyre Type | Tubeless | Tubeless |
| Wheel Type | Cast aluminum (Lakester) | Alloy |
Features & Technology |
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| Headlight | LED | LED Headlamp |
Other Specifications |
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| Battery | — | 12 V, 8 AH MF battery |
| Bike Image 1 | https://motoautiv.com/wp-content/uploads/2025/06/Blue.avif | https://motoautiv.com/wp-content/uploads/2025/12/GP-Edition-Blue.avif |
| Bike Image 2 | https://motoautiv.com/wp-content/uploads/2025/06/Grey.avif | https://motoautiv.com/wp-content/uploads/2025/12/Orange.avif |
| Bike Image 3 | https://motoautiv.com/wp-content/uploads/2025/06/Whiskey-fire.avif | https://motoautiv.com/wp-content/uploads/2025/12/GP-Edition-Orange.avif |
| Cluster | Analog with LCD | TFT Multifunction display |
| Color Options | Billiard Gray | #6B7074 Vivid Black | #0F0F10 Blue Burst | #1E4D8C Whiskey Fire / Vivid Black | #7A2D1B, #0F0F10 | Orange | #FF5A00 Blue | #1F3F8B GP Edition Blue | #1F3F8B, #FF5A00 GP Edition Orange | #FF5A00, #1F3F8B |
| 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. | Heat Buildup: The single-cylinder engine can produce noticeable heat in heavy traffic or slow-moving city rides. Harsh Ride at Low Speeds: Stiff sport suspension can make daily commuting rough on bumpy or uneven roads. Aggressive Riding Posture: The forward-leaning position can be fatiguing for longer rides or casual commuting. Fuel Efficiency: The bike’s performance comes at a cost — real-world mileage is moderate when ridden aggressively. Maintenance Costs: Premium parts and periodic services (especially for the high-performance components) can be more expensive compared to typical middleweight bikes. Limited Comfort for Pillion: The rear seat is compact and not very comfortable for longer pillion rides. |
| 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 RC 390 is a fully faired motorcycle built around a 373cc, single-cylinder, liquid-cooled engine. This engine produces close to 43 bhp and around 37 Nm of torque, and it is paired with a six-speed gearbox. The power delivery is spread across the rev range, with noticeable strength in the mid and top end, which becomes useful during highway riding and quick overtakes. The bike uses a ride-by-wire throttle system, which manages throttle input electronically, and it also comes with a slipper clutch that helps reduce sudden rear wheel movement during aggressive downshifts. The motorcycle is based on a steel trellis frame, which is designed to keep the weight low while maintaining structural strength. It is equipped with upside-down front forks from WP and a rear monoshock, both of which are tuned to handle higher speeds and cornering stability. The braking setup includes a large front disc and a rear disc, supported by dual-channel ABS. The ABS system also offers a Supermoto mode, which allows the rear ABS to be disengaged while keeping the front active. The bike rides on 17-inch alloy wheels fitted with tubeless tyres. In terms of design, the RC 390 features a fully faired body with a front section that includes a single LED headlamp and integrated indicators. The fairing is shaped to improve airflow around the rider and the engine area. The windscreen is slightly raised to provide some level of wind protection at higher speeds. The seat is split into two sections, with a slightly elevated rear portion, and the fuel tank is shaped to allow the rider to grip it while riding. The overall layout gives the bike a compact and focused appearance. The feature list includes a TFT display that shows information such as speed, gear position, fuel level, and trip data. It also supports smartphone connectivity for basic functions. Other electronic features include traction control, which helps manage wheel spin under acceleration. The bike has a fuel tank capacity of around 13.7 litres, and the kerb weight is approximately 172 kg. The seat height is around 824 mm, which affects how easily riders can place their feet on the ground. The riding position is set up with clip-on handlebars and rear-set footpegs, which creates a forward-leaning posture. This setup changes how the rider interacts with the bike, especially during longer rides or slow-moving traffic. Overall, the KTM RC 390 combines its engine, chassis, and electronic features into a package that is designed to deliver a certain type of riding experience, defined largely by its specifications and mechanical setup. |
| 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 RC 390 is designed with a strong focus on performance and track-style riding, which is clear from its sharp fully faired design and aggressive riding posture. The low clip-on handlebars and rear-set footpegs place the rider in a forward-leaning position, offering better control at higher speeds but making slow city rides feel a bit demanding. Its 373cc single-cylinder engine delivers quick and energetic acceleration, especially in the mid and top range, and responds well to throttle inputs during overtakes or highway riding. The six-speed gearbox, along with a slipper clutch, helps in smoother shifts and better control while downshifting. Handling is one of its key strengths, with the bike feeling stable in corners and composed at higher speeds, supported by a lightweight frame and well-tuned suspension. Braking is predictable and confidence-inspiring, with disc brakes and dual-channel ABS adding to safety. It also comes with modern features like a TFT display and ride-by-wire throttle, though the overall setup leans more towards performance than everyday comfort, with a firm seat and committed riding position., 4.2, 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 specification of the KTM RC 390? A: The RC 390 is powered by a 373.27 cc single-cylinder, liquid-cooled, DOHC engine. Q: How much power and torque does KTM RC 390 produce? A: KTM RC 390 generates approximately 43.5 PS at 9,000 rpm and 37 Nm of torque at 7,000 rpm. Q: What is the fuel tank capacity and mileage of the RC 390? A: The bike has a 13.7-litre fuel tank. Q: What type of brakes and safety features does the KTM RC 390 come with? A: It features a 320 mm front disc and a 230 mm rear disc, paired with dual-channel ABS and a Supermoto mode for the ABS system. Q: What suspension setup does the RC 390 have? A: It uses WP APEX 43 mm USD forks at the front and a 10-step adjustable WP APEX monoshock at the rear. Q: What is the seat height and kerb weight of the RC 390? A: The seat height is 835 mm and the kerb weight is 172 kg. Q: Does the RC 390 support quick shifting and a slipper clutch? A: Yes, it comes with a slipper and assist clutch to make downshifts smoother and reduce rear-wheel chatter. Q: What electronic rider aids are available on the RC 390? A: The RC 390 offers several aids, including Motorcycle Traction Control (MTC), cornering ABS, and Quickshifter+. Q: What kind of instrument cluster does KTM RC 390 have? A: It features a TFT multifunction display that shows info like speed, rpm, gear position, fuel range, and more. Q: Is the KTM RC 390 suitable for both city riding and weekend rides? A: Yes, it’s designed to be sporty and rider-focused, making it agile enough for city commuting, while its power and handling also make it a capable pick for weekend rides. |
| Fuel System | Fuel Injection | Electronic Fuel Injection |
| Price Variants | STD | 2803000 | GP Edition | 322719 STD | 323068 |
| 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. | High Power for Its Class: With a 373cc single-cylinder engine, the RC 390 delivers blistering performance and is one of the most powerful in its segment. Aggressive Sport Styling: Fully-faired design, sharp lines, and MotoGP-inspired graphics make it visually striking. Premium Components: Equipped with WP suspension, a slipper/assist clutch, and a responsive quickshifter, giving a premium feel at this displacement. Modern Electronics: Features like Traction Control (MTC), cornering ABS, ride-by-wire throttle, and Quickshifter+ boost both safety and performance. Excellent Braking: Strong braking performance using a 320 mm front disc and dual-channel ABS ensures high safety. TFT Instrument Cluster: A full-color display provides essential information and adds a modern touch to the cockpit. Excellent Handling: Lightweight frame and sporty geometry result in agile, confidence-inspiring cornering and performance. |
| Starter | Electric | Self Start Only |
| Transmission | 6-speed manual | 6 Speed Manual |
