Quick Analysis
Harley-Davidson X™ 440
19.5 pts
Unweighted: 16 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
YAMAHA Aerox 155
12.5 pts
Unweighted: 6 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | Oil‑cooled | Liquid Cooled |
| Displacement | 440 cc | 155 CC |
| Engine Type | 440 cc single-cylinder engine | Liquid cooled, 4-stroke, SOHC, 4-valve |
| Power | 27 bhp / 20.1 kW @ 6000 RPM | 11.0kW(15.0PS)/8000r/min |
| Torque | 38 Nm @ 4 000 rpm | 13.9N.m(1.4kgf.m)/6500r/min |
Performance & Efficiency |
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| Fuel Tank Capacity | 13.5 L | 5.5 L |
| Mileage | 35 Kmpl | 48.62 Kmpl |
Dimensions & Weight |
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| Kerb Weight | 190.5 | 126 |
| Seat Height | 805 | 790 |
Brakes & Suspension |
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| ABS | Dual‑channel ABS | Single Channel ABS |
| Front Brake | 320 mm Disc | Disc Brake(230mm) with ABS |
| Front Suspension | KYB USD 43mm Dual Cartridge Forks | Telescopic fork |
| Rear Brake | 240 mm Disc | Drum(130mm) |
| Rear Suspension | Gas filled Twin Shocks, 7-step preload adjustable | Unit swing |
Tyres & Wheels |
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| Front Tyre | 100/90‑18 | 110/80-14M/C 53P |
| Rear Tyre | 140/70‑17 | 140/70-14M/C 62P |
| Tyre Type | Tubeless | Tubeless |
| Wheel Type | Alloy | Alloy |
Features & Technology |
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| Headlight | LED | LED (Class D) |
Other Specifications |
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| Battery | 12V / 8AH | 12 V, 6.0 Ah |
| Bike Image 1 | https://motoautiv.com/wp-content/uploads/2025/06/Black-3.avif | https://motoautiv.com/wp-content/uploads/2025/05/Metallic-Black-2.avif |
| Bike Image 2 | https://motoautiv.com/wp-content/uploads/2025/06/Dark-Silver.avif | https://motoautiv.com/wp-content/uploads/2025/05/Racing-Blue-4.avif |
| Bike Image 3 | https://motoautiv.com/wp-content/uploads/2025/06/Goldfish-silver.avif | — |
| Bike Image 4 | https://motoautiv.com/wp-content/uploads/2025/06/Mustard.avif | — |
| Bike Image 5 | https://motoautiv.com/wp-content/uploads/2025/06/red.avif | — |
| Cluster | TFT cluster on top trim - base trims blank | Digital |
| Color Options | Mustard | #C48A1A Goldfish Silver | #B7B8B3 Metallic Dark Silver | #5E6163 Metallic Thick Red | #8A1F24 Baja Orange | #D65A1F Matte Black | #1A1A1A | Racing Blue | #0047AB Ice Fluo Vermillion | #F5F5F5, #FF5A36 Metallic Black | #1C1C1C |
| Cons | The Engine Feels More Relaxed Than Exciting – Riders expecting the urgency of a high-revving motorcycle may find the power delivery focused more on torque and flexibility than outright acceleration. Weight Is Noticeable at Standstill – While manageable once moving, the motorcycle is heavier than several competitors in the 400cc segment. Gearbox Could Feel Smoother – Some riders may notice that shifts are not always as slick as those found on certain Japanese or European alternatives. Limited Wind Protection on Highways – As a naked roadster, the rider is exposed to wind pressure at sustained highway speeds. Not Designed for Aggressive Cornering – The chassis and suspension are tuned more for stability and comfort than for sporty riding. Service Network Is Still Expanding – Compared to manufacturers with decades-old nationwide networks, dedicated Harley-Davidson/Hero service coverage is still developing in some regions. Pillion Space Is Adequate Rather Than Generous – Passenger comfort is acceptable for daily use, but the rear seat is not particularly spacious. Technology Varies Across Variants – Some features are limited to higher trims, meaning buyers need to pay close attention to variant differences. Engine Vibrations Become More Noticeable at Higher Speeds – While generally refined for a large single-cylinder motorcycle, vibrations can be felt more clearly as engine speeds rise. Brand Expectations Can Be Misleading – The Harley-Davidson badge may lead some buyers to expect the character of larger V-twin Harley models, whereas the X440 is a completely different type of motorcycle developed specifically for markets such as India. | Firm Suspension Setup - The most common complaint from owners is the stiff ride quality. Rough roads, potholes, and broken surfaces can be felt more noticeably compared to comfort-focused scooters. Limited Floorboard Practicality - Unlike conventional scooters, the Aerox has a central tunnel, which eliminates the flat floorboard. This can reduce convenience when carrying shopping bags or larger items. Large Turning Radius - Some riders find U-turns and tight-space maneuvering less convenient due to the scooter's longer wheelbase and sporty geometry. Premium Pricing - The Aerox 155 is positioned above many mainstream scooters, making it one of the more expensive options in the category. Pillion Comfort Could Be Better - While acceptable for city use, some pillion riders report that the rear seat can feel firm during longer journeys. Heavier Than Typical Scooters - At approximately 126 kg, the Aerox is noticeably heavier than most 125cc scooters, which can be felt while parking or pushing the scooter manually. |
| Detailed Overview | The Harley-Davidson X440 occupies a different position within Harley-Davidson’s global lineup from the motorcycles most people typically associate with the brand. Developed in collaboration with Hero MotoCorp and manufactured in India, the X440 was created for markets where mid-capacity motorcycles form a significant part of everyday transportation and recreational riding. As a result, its design, engine configuration, and overall package differ considerably from Harley-Davidson’s larger V-twin cruisers and touring motorcycles. At the centre of the motorcycle is a 440cc single-cylinder, air-oil cooled engine. Unlike the large multi-cylinder or V-twin engines found in many Harley-Davidson models, this engine follows a simpler layout intended for everyday road use. The long-stroke configuration influences how the engine delivers its performance, with much of its torque available relatively early in the rev range. Paired with a six-speed gearbox, the engine is designed to operate across a wide variety of riding conditions, from urban traffic to sustained highway speeds. Fuel injection manages fuel delivery, while an assist-and-slipper clutch is included to reduce clutch effort and moderate rear-wheel behaviour during aggressive downshifts. The motorcycle uses a steel trellis frame as its structural foundation. Suspension duties are handled by upside-down front forks and twin rear shock absorbers. This combination differs from many motorcycles in the segment that use a rear monoshock, and it contributes to the X440’s visual identity as well as its chassis layout. The suspension components are tasked with balancing comfort and stability across a range of road surfaces commonly encountered in Indian riding conditions. Visually, the X440 adopts a roadster format with several retro-inspired design elements. The round LED headlamp, sculpted fuel tank, exposed engine, and minimal bodywork create a design that references classic motorcycles without directly replicating any specific historical model. The motorcycle avoids extensive fairings or body panels, leaving much of the mechanical structure visible. This approach contributes to its relatively straightforward appearance and aligns with the roadster category in which it competes. Braking is managed through a disc brake at both ends, supported by dual-channel ABS. Depending on the variant, the motorcycle may also include traction control, a feature that remains relatively uncommon in this segment. These electronic systems operate alongside the mechanical components to assist with braking and traction management under different riding conditions. The rider’s position reflects the motorcycle’s everyday usability focus. A wide handlebar, centrally positioned footpegs, and an 805 mm seat height create a neutral riding posture that differs from both aggressive sport motorcycles and laid-back cruisers. The ergonomics place the rider in an upright position, allowing a clear view of the road and reducing the forward lean associated with sport-oriented machines. Technology levels vary between variants, but the range includes features such as LED lighting, a TFT instrument display, Bluetooth connectivity, and turn-by-turn navigation. These systems are integrated into the motorcycle without substantially altering its minimalist design. The TFT display serves as the primary interface for riding information and connected functions, while retaining a relatively uncluttered appearance. The motorcycle carries a 13.5-litre fuel tank and has a kerb weight of approximately 190.5 kg. These figures place it within the middleweight category, where it competes with a mix of roadsters, modern classics, and retro-inspired motorcycles. Taken together, the X440 combines a single-cylinder engine, steel trellis chassis, modern electronics, and roadster ergonomics in a package developed specifically for the requirements of the Indian mid-capacity motorcycle market. | The Yamaha Aerox 155 is a maxi-scooter that brings together scooter practicality and motorcycle-inspired engineering in a package designed for both urban commuting and higher-speed riding. Unlike conventional scooters that primarily focus on convenience and comfort, the Aerox 155 incorporates several performance-oriented components, giving it a distinct identity within the Indian scooter market. Its design features a sharp and aerodynamic body structure, aggressive front styling, twin LED headlamps, sculpted side panels, and a stepped seat arrangement that reflects its sporty character. The overall proportions are larger than those of most traditional scooters, contributing to its maxi-scooter appearance and road presence. At the heart of the Yamaha Aerox 155 is a 155cc, single-cylinder, liquid-cooled, fuel-injected engine. This powerplant produces approximately 15 PS of power and 13.9 Nm of torque and is paired with a continuously variable transmission (CVT). The engine incorporates Yamaha’s Variable Valve Actuation (VVA) technology, which adjusts valve timing according to engine speed to maintain performance across a wider rpm range. This allows the engine to deliver smooth low-speed operation in city traffic while retaining strong performance at higher speeds. Fuel injection technology further helps optimize throttle response, fuel delivery, and engine efficiency under varying riding conditions. The Aerox 155 is built on an underbone frame that contributes to structural rigidity and handling stability. One of its notable characteristics is the use of 14-inch alloy wheels at both the front and rear, which are larger than those found on many scooters in the segment. These larger wheels work alongside wide tubeless tyres to enhance stability, road grip, and overall handling dynamics. Suspension duties are handled by telescopic front forks and twin rear shock absorbers, forming a setup intended to balance comfort and riding control across different road conditions. Braking performance is managed by a front disc brake and rear drum brake combination. The front wheel is equipped with a single-channel Anti-lock Braking System (ABS), which helps reduce the chances of wheel lock-up during sudden braking situations. The scooter also includes a Traction Control System (TCS), a feature that monitors wheel slip and adjusts power delivery when traction levels are reduced, particularly on slippery road surfaces. The Yamaha Aerox 155 offers a fuel tank capacity of 5.5 litres and has a kerb weight of approximately 126 kg. Its seat height of 790 mm makes it accessible to a broad range of riders, while the long wheelbase contributes to stability during higher-speed riding. The scooter also provides approximately 24.5 litres of under-seat storage space, allowing riders to carry daily essentials and certain helmet types depending on their dimensions. Technology plays a significant role in the Aerox 155 package. The scooter features a fully digital LCD instrument cluster that displays speed, fuel level, trip information, and other riding data. Bluetooth connectivity through Yamaha’s Y-Connect application allows riders to access call alerts, message notifications, maintenance updates, fuel consumption statistics, and smartphone connectivity functions. The Version S variant additionally includes a Smart Key system, enabling keyless ignition and other convenience features. Additional equipment includes full LED lighting, an automatic start-stop system designed to reduce fuel consumption during idle periods, a side-stand engine cut-off function, and an electric starter system. These features contribute to the scooter’s modern equipment list while supporting everyday usability. Overall, the Yamaha Aerox 155 combines a liquid-cooled VVA engine, large wheels, traction control, ABS, modern connectivity features, and maxi-scooter styling into a package that differs significantly from conventional commuter scooters. Its specifications emphasize performance, stability, and technology while retaining the practicality expected from an automatic scooter. |
| Expert Review | The X440 is an interesting motorcycle because it doesn't fit neatly into the categories that dominate the 400cc segment. Rather than chasing peak power figures or adopting an overtly sporty character, it focuses on delivering accessible performance through a long-stroke single-cylinder engine that produces most of its torque lower in the rev range. The result is a motorcycle that often feels more relaxed than many of its rivals. In urban riding, the engine's flexibility reduces the need for constant gear changes, while on open roads it settles into a steady cruising rhythm without feeling particularly eager to be ridden at the upper end of the rev range. The chassis and suspension are tuned with a similar philosophy. The motorcycle responds predictably to rider inputs and deals with imperfect road surfaces without feeling overly stiff. Its dimensions and weight give it a sense of stability, although they also make it feel less light-footed than some competitors. The feature list covers the expectations of a modern middleweight motorcycle, with connectivity functions, traction control, LED lighting, and a TFT display available depending on the variant. Taken as a whole, the X440 feels like a motorcycle developed around everyday usability and road-going practicality rather than outright performance or sport-oriented riding dynamics., 4.2, MotoAutiv Team | The Yamaha Aerox 155 stands apart from conventional scooters by focusing heavily on performance and handling rather than pure practicality. Its 155cc liquid-cooled engine, derived from the Yamaha R15 platform, delivers strong acceleration, smooth power delivery, and impressive highway cruising ability for a scooter. The chassis feels rigid and composed, while the 14-inch wheels and wide tyres provide a level of stability and cornering confidence that is uncommon in this segment. The Aerox remains one of the few scooters that feels equally comfortable filtering through city traffic and maintaining triple-digit highway speeds. However, this sporty character comes with compromises. The rear suspension is noticeably firm on broken roads, the central tunnel reduces floorboard utility, and the rear drum brake feels less sophisticated than the rest of the package. The feature list, including traction control, Bluetooth connectivity, LED lighting, and Smart Key technology on the Version S, adds a premium touch, but the scooter's overall appeal is defined more by its riding dynamics than by outright practicality. Multiple long-term reviews and owner experiences consistently highlight the Aerox's combination of refinement, high-speed stability, and engaging handling, while ride comfort and everyday utility remain the most frequently cited drawbacks., 4.5, MotoAutiv Team |
| FAQ (Manual Override) | Q: What engine does the X440 use? A: It is powered by a 440cc single-cylinder, air-oil cooled engine paired with a 6-speed gearbox. Q: What is the power output of the X440? A: The engine produces approximately 27 bhp and 38 Nm of torque. Q: Does the X440 have a slipper clutch? A: Yes. The motorcycle is equipped with an assist-and-slipper clutch. Q: Does the X440 have traction control? A: Yes. Traction control is available on higher variants. Q: What is the fuel tank capacity? A: The motorcycle has a 13.5-litre fuel tank. Q: Is the X440 suitable for highway touring? A: Yes. The engine's torque characteristics and 6-speed gearbox allow comfortable highway cruising, although it is not a dedicated touring motorcycle. Q: Does the X440 have Bluetooth connectivity? A: Yes. Higher variants offer Bluetooth connectivity, turn-by-turn navigation, and connected features through the TFT display. Q: What is the seat height of the X440? A: The seat height is approximately 805 mm. Q: What is the kerb weight of the X440? A: The motorcycle weighs around 190.5 kg in running condition. Q: Is the X440 beginner-friendly? A: Its predictable power delivery and neutral ergonomics make it approachable, although the weight may require some adjustment for completely new riders. Q: Does the X440 have dual-channel ABS? A: Yes. Dual-channel ABS is standard across the range. Q: How is the X440 different from the Triumph Speed 400? A: The X440 focuses more on low-end torque and relaxed riding, while the Speed 400 has a lighter chassis and a more performance-oriented engine character. Q: How is the X440 different from the Royal Enfield Guerrilla 450? A: The Guerrilla 450 uses a liquid-cooled engine with a stronger top-end focus, whereas the X440 delivers its performance lower in the rev range. | Q: What is the real-world mileage of the Yamaha Aerox 155? A: Most Yamaha Aerox 155 owners report real-world fuel efficiency between 38 and 45 km/l, depending on riding style, traffic conditions, and maintenance. Q: What is the top speed of the Yamaha Aerox 155? A: The Yamaha Aerox 155 can achieve a top speed of approximately 115-120 km/h under suitable riding conditions. Q: Does the Yamaha Aerox 155 use the same engine as the Yamaha R15? A: Yes, the Yamaha Aerox 155 uses a version of the same 155cc liquid-cooled, VVA-equipped engine found in the Yamaha R15 V4, adapted for scooter use. Q: Is the Yamaha Aerox 155 suitable for long-distance touring? A: Yes, the Yamaha Aerox 155 is often considered one of the most highway-capable scooters in India due to its powerful engine, stable chassis, and comfortable cruising characteristics. Q: Does the Yamaha Aerox 155 have traction control? A: Yes, the Yamaha Aerox 155 comes equipped with a Traction Control System (TCS), which helps improve stability on low-grip surfaces. Q: Does the Yamaha Aerox 155 have keyless ignition? A: The Version S variant of the Yamaha Aerox 155 features a Smart Key system that provides keyless ignition and additional convenience functions. Q: Can a full-face helmet fit in the Yamaha Aerox 155 under-seat storage? A: The Yamaha Aerox 155 offers approximately 24.5 litres of under-seat storage. Many full-face helmets can fit, although compatibility depends on the helmet's size and shell design. Q: What is the fuel tank capacity of the Yamaha Aerox 155? A: The Yamaha Aerox 155 is equipped with a 5.5-litre fuel tank. Q: Is the Yamaha Aerox 155 comfortable for daily commuting? A: Yes, the Yamaha Aerox 155 can be used for daily commuting, though its sporty ergonomics, firm suspension, and central tunnel make it less practicality-focused than traditional family scooters. Q: What is the seat height of the Yamaha Aerox 155? A: The Yamaha Aerox 155 has a seat height of 790 mm, making it accessible to a wide range of riders. Q: Does the Yamaha Aerox 155 have ABS? A: Yes, the Yamaha Aerox 155 comes with a front-wheel Anti-lock Braking System (ABS) as standard. Q: Why is the Yamaha Aerox 155 more expensive than many 125cc scooters? A: The Yamaha Aerox 155 features a larger liquid-cooled engine, traction control, ABS, Bluetooth connectivity, premium chassis components, and performance-oriented engineering, which contribute to its higher pricing compared to conventional 125cc scooters. |
| Fuel System | Fuel Injection | Fuel Injection |
| Price Variants | S | 235000 Vivid | 259000 | STD | 143120 S | 146120 |
| Pros | The Engine Prioritizes Usability Over Peak Numbers – The 440cc single-cylinder engine produces its performance in a relaxed and accessible manner. Most of the usable torque arrives early in the rev range, which means the motorcycle doesn't need frequent gear changes in everyday riding. Comfortable Riding Position – The handlebar, seat, and footpeg placement create a neutral riding posture. Neither sporty nor cruiser-like, the ergonomics are designed around everyday road use. Well-Suited to Indian Road Conditions – The suspension setup has enough travel to deal with broken surfaces, speed breakers, and uneven roads without feeling excessively firm. Strong Mid-Range Performance – The motorcycle feels most at home in the middle of the rev range, where overtakes and highway cruising typically take place. Metal Construction in Key Areas – Components such as the fuel tank and various body panels contribute to a solid feel that is becoming less common in motorcycles that rely heavily on plastic bodywork. Modern Features Without Overcomplication – Depending on the variant, the X440 offers Bluetooth connectivity, navigation functions, LED lighting, traction control, and a TFT instrument display. Stable Highway Behaviour – The wheelbase, chassis setup, and engine characteristics allow the motorcycle to maintain cruising speeds comfortably. Distinctive Design Within the Segment – The round LED headlamp, wide fuel tank, and exposed mechanical components give the motorcycle a different visual identity compared with many other roadsters in the category. | Powerful 155cc Engine - The Aerox 155 is widely praised for its performance. Its liquid-cooled, fuel-injected engine with Variable Valve Actuation (VVA) delivers strong acceleration and feels significantly more energetic than most scooters in the segment. Excellent Highway Capability - Many owners highlight the scooter's ability to cruise comfortably at highway speeds. The engine remains relaxed at higher speeds, making longer journeys more manageable than on typical 125cc scooters. Stable Handling - The rigid chassis, larger 14-inch wheels, and longer wheelbase contribute to confident handling. Riders often appreciate its stability while cornering and riding on open roads. Sporty Design - The maxi-scooter styling receives positive feedback for its aggressive appearance, sharp bodywork, and premium road presence. Feature-Rich Package - Features such as traction control, Smart Key technology (Version S), Bluetooth connectivity, LED lighting, side-stand engine cut-off, and a digital instrument console add modern functionality. Large Under-Seat Storage - The spacious storage compartment is capable of accommodating daily essentials and certain full-face helmets, adding practicality to the sporty design. Refined Engine Performance - Owners frequently mention the smoothness of the liquid-cooled engine, especially during high-speed cruising and longer rides. |
| Starter | Electric | Electric starter |
| Transmission | 6‑speed manual | V-belt automatic |
