Quick Analysis
Harley Davidson Fat Boy
18.0 pts
Unweighted: 15 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
KTM 350 EXC-F SIX DAYS
14.0 pts
Unweighted: 9 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | Air-cooled | Liquid-cooled |
| Displacement | 1,923 cc | 349.7 cc |
| Engine Type | Milwaukee-Eight™ 117 Custom | 1-cylinder, 4-stroke engine |
| Power | 103 HP / 77 kW @ 5020 rpm | 44.3 bhp @ 9500 rpm |
| Torque | 168 Nm @ 3000 rpm | 36 Nm @ 7000 rpm |
Performance & Efficiency |
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| Fuel Tank Capacity | 18.9 litres | 8.5 L |
| Mileage | 18.18 Kmpl | 25 kmpl |
Dimensions & Weight |
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| Kerb Weight | 315 | 107 |
| Seat Height | 675 | 963 |
Brakes & Suspension |
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| ABS | Dual-channel ABS | Dual Channel ABS |
| Front Brake | Disc | Disc 220 mm |
| Front Suspension | Dual-bending valve 49 mm telescopic with aluminum fork triple clamps, dual rate spring | WP XACT-USD, Ø 48 mm |
| Rear Brake | Disc | Disc 220 mm |
| Rear Suspension | Hidden, free piston, coil-over monoshock; 43mm stroke, hydraulic preload adjustment | WP XPLOR shock absorber with PDS |
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 | Tubed |
| Wheel Type | Cast aluminum (Lakester) | Spoke |
Features & Technology |
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| Headlight | LED | LED headlight |
Other Specifications |
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| Battery | — | 12.8V 2Ah |
| Bike Image 1 | https://motoautiv.com/wp-content/uploads/2025/06/Blue.avif | — |
| 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 | Metallic White | #F4F4F4 |
| 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 purchase cost: As a premium “Six Days” edition, it’s more expensive than standard enduro bikes. Tall seat height: Around 963 mm, which can be difficult for shorter or less‑experienced riders. Small-ish fuel tank (~8.5 L), which may limit range in very long or remote enduro rides. Maintenance-intensive: High-performance components (valves, clutch, engine) need frequent checks and servicing. Can feel “stiff” for casual riders: The race-tuned suspension and aggressive setup may not be comfortable for easy trail riding. Reliability concerns: Some users report fueling issues (lean running), and need for aftermarket ECU or tuning.; Battery dependency: Electric start depends on the lightweight batter if it fails, starting could be problematic. |
| 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 350 EXC-F Six Days is a premium, race-oriented version of KTM’s 350cc enduro bike, designed to deliver top-tier performance for serious off-road riders who demand both power and endurance. Constructed with high-quality components and Six Days–specific upgrades, this model embodies KTM’s racing legacy while remaining practical enough for hard enduro, cross-country, and competition-style riding. At its heart, the Six Days version uses a 349.7 cc single-cylinder, 4-stroke, DOHC engine. The engine features a Keihin EFI system with a 42 mm throttle body for precise fuel delivery and efficient performance. A wet, multi-disc DDS clutch with Brembo hydraulics gives smooth yet reliable clutch control, while the 6-speed gearbox offers a wide range of ratios to tackle technical terrain and high-speed sections. Powerplant design also focuses on minimizing friction and centralizing mass, the engine is slightly tilted backward for a low center of gravity and better balance. For starting, the bike uses an electric starter powered by a lightweight 2 Ah lithium-ion battery. This setup ensures reliable starts and helps reduce overall weight. The wiring harness is smartly tucked under the seat to keep things clean and accessible. The chassis is built from 25CrMo4 chromoly steel in a double-cradle design, giving it the right mix of strength and flex for rugged terrain. The sub-frame is a two-part construction made from reinforced aluminum and polyamide, designed to flex under stress instead of breaking. To maintain stability, the Six Days has CNC-machined triple clamps and a forged steering head these contribute to strong rigidity and precise handling, even at high speed or on demanding trails. Suspension is a standout: up front, there’s a 48 mm WP XACT upside-down fork with fully adjustable compression and rebound. At the back, a WP XPLOR PDS shock offers tool-free hand-adjustable dual compression clickers, making it easy to tune on the fly. Suspension travel is generous 300 mm at the front and 310 mm at the rear, helping the bike soak up big hits, jumps, and rough terrain. The Six Days edition also comes fitted with GIANT alloy wheels (1.60×21″ front, 2.15×18″ rear) and high-traction Metzeler 6 Days Extreme tires, tailored for grippy performance in a variety of off-road conditions. Braking is handled by large discs 260 mm at the front and 220 mm at the rear providing reliable stopping power. In terms of ergonomics, the seat height is 963 mm, which suits taller or more experienced riders, and ground clearance is a generous 347 mm, helping clear obstacles easily. The fuel tank has a capacity of about 8.5 liters, made from transparent XPE material so you can easily see fuel level, and it’s designed for durability and low weight. KTM has also included modern rider aids: there’s a Map Select switch which lets riders toggle between different engine maps for varied terrain, and traction control (MTC) helps maintain grip when things get slippery. Optionally, there’s also a quick-shifter for clutchless upshifts (2nd to 6th gear), which is particularly useful for racing or long enduro stages. Durability is a big focus. The Six Days version includes factory protection like reinforced plastics, and the frame and subframe are built to resist stress and flex intelligently. The exhaust is compact and routed close to the engine for better mass centralization and protection. Overall, the KTM 350 EXC-F Six Days blends race-grade performance with thoughtful off-road capability. It’s a bike built for enduro warriors who want a powerful, agile, and durable machine perfect for demanding multi-day events or serious trail riding. |
| 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 350 EXC-F Six Days is an enduro motorcycle designed for serious off-road riding, sitting between the lighter 250 and more powerful 450 in terms of performance. It uses a 349.7cc four-stroke engine that delivers smooth and linear power, making it easier to manage across both tight trails and open sections. The lightweight chassis and fully adjustable WP suspension help it handle rough terrain, rocks, and jumps effectively, while still feeling agile and controlled. The Six Days version adds features like a map switch, traction control, and quick shifter, which improve adaptability in different riding conditions. However, the tall seat height, firm setup, and high maintenance needs can make it demanding for less experienced riders, and its small fuel tank limits long-distance use. Overall, it is built mainly for technical off-road riding rather than everyday practicality., 4.0, 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: Is the KTM 350 EXC-F Six Days road legal in India? A: No, the KTM 350 EXC-F Six Days is not road legal in India and is designed mainly for off-road and enduro riding. Q: What is the engine capacity of the KTM 350 EXC-F Six Days? A: The KTM 350 EXC-F Six Days comes with a 349.7cc, single-cylinder, liquid-cooled, four-stroke engine. Q: Is the KTM 350 EXC-F Six Days suitable for beginners? A: The KTM 350 EXC-F Six Days is not ideal for beginners and is better suited for riders with prior off-road experience. Q: What makes the KTM 350 EXC-F Six Days different from the standard version? A: The KTM 350 EXC-F Six Days includes features like traction control, map switch, quick shifter, and upgraded components for improved off-road performance. Q: Can the KTM 350 EXC-F Six Days be used for long-distance touring? A: The KTM 350 EXC-F Six Days is not designed for touring due to its small fuel tank and off-road-focused setup. Q: What type of riding is the KTM 350 EXC-F Six Days best for? A: The KTM 350 EXC-F Six Days is best suited for enduro riding, trail riding, and technical off-road conditions. Q: Does the KTM 350 EXC-F Six Days require high maintenance? A: Yes, the KTM 350 EXC-F Six Days requires regular servicing and maintenance, especially when used aggressively off-road. Q: What is the weight of the KTM 350 EXC-F Six Days? A: The KTM 350 EXC-F Six Days weighs just over 100 kg (dry), making it easier to handle on trails. Q: Does the KTM 350 EXC-F Six Days have electric start? A: Yes, the KTM 350 EXC-F Six Days comes with an electric start system. Q: How is the KTM 350 EXC-F Six Days different from a 450cc enduro bike? A: The KTM 350 EXC-F Six Days offers a balance between power and control, making it easier to handle than a 450cc bike while still being more powerful than a 250cc. |
| Fuel System | Fuel Injection | Electronic Fuel Injection |
| Price Variants | STD | 2803000 | Pro Xp | 1295800 |
| 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. | Very good power-to-weight ratio, compact 350 cc engine + light chassis gives strong performance. Highly adjustable suspension: 48 mm WP XACT fork + WP XPLOR PDS shock, both with tool-free tuning. High-end factory parts: CNC-machined triple clamps, Six Days‑specific styling and components. Electric start with a lightweight lithium-ion battery makes it easier to start in remote locations. Quickshifter included for clutchless upshifts (2nd–6th gear), great for racing or long enduro stages. Map switch / traction control: Lets the rider change engine mapping on the go for different terrain. Durable and race‑ready: Built to ISDE (Six Days) spec, with strong frame and race-focused components. Good ergonomics: Rider-focused design, with good grip, balanced weight distribution, and flat seat profile. |
| Starter | Electric | — |
| Transmission | 6-speed manual | 6 Speed Manual |
