Quick Analysis
KTM 50 SX
9.5 pts
Unweighted: 4 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
TRIUMPH SPEED 400 MY25
28.0 pts
Unweighted: 19 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | — | Liquid-cooled |
| Displacement | 49.9 cc | 398.15 cc |
| Engine Type | 1-cylinder, 2-stroke engine | 4 valve, DOHC, single-cylinder |
| Power | 5.3 bhp @ 11500 rpm | 40 PS / 39.5 bhp (29.4 kW) @ 8,000 rpm |
| Torque | 5.2 Nm @ 7500 rpm | 37.5 Nm @ 6,500 rpm |
Performance & Efficiency |
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| Fuel Tank Capacity | 2.3 L | 13 l |
| Mileage | 30 kmpl | 29 l |
Dimensions & Weight |
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| Kerb Weight | 41 kg | 176 kg |
| Seat Height | 653 mm | 803 mm |
Brakes & Suspension |
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| ABS | — | Dual Channel ABS |
| Front Brake | Disc 160 mm | 300mm fixed disc, four-piston radial caliper, ABS |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm | 43mm upside down Big Piston forks. 140mm wheel travel |
| Rear Brake | Disc 160 mm | 230mm fixed disc, floating caliper, ABS |
| Rear Suspension | XACT WP mono shock | Gas monoshock RSU with external reservoir and pre-load adjustment. 120mm wheel travel |
Tyres & Wheels |
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| Front Tyre | 60/100 - 12 | 110/80 R17 |
| Rear Tyre | 2.75 - 10 | 150/70 R17 |
| Tyre Type | Tubed | Tubeless |
| Wheel Type | Spoke | Alloy |
Features & Technology |
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| Headlight | — | DRL s LED |
Other Specifications |
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| Bike Image 1 | — | https://motoautiv.com/wp-content/uploads/2025/10/speed400pearlmetallicwhitepewtergrey.webp |
| Bike Image 2 | — | https://motoautiv.com/wp-content/uploads/2025/10/speed400phantomblackpewtergrey.webp |
| Bike Image 3 | — | https://motoautiv.com/wp-content/uploads/2025/10/speed400racingyellowpearlmetallicwhite.webp |
| Color Options | Electronic Orange | Racing Red / Pearl Metallic White Racing Yellow / Pearl Metallic White Phantom Black / Pewter Grey Pearl Metallic White / Pewter Grey |
| Cons | High Maintenance: As a 2-stroke engine, it requires frequent servicing and tuning. Small Fuel Tank: Limited capacity means more frequent refills. Kick-Start Only: No electric start, which can be tricky for very young riders. Limited Power for Older Kids: The 50cc engine may not be enough as the rider grows or becomes more skilled. Sensitive to Tuning: Owners report issues like fouling spark plugs or needing to frequently re-jet the carb: “Used to run great … then started fowling plugs … Moved to a 95 main jet … About 15 kph slower …” Parts Cost & Availability: As a race‑oriented bike, some parts can be expensive or harder to source for older models. | Lacks some modern features compared to rivals — no full TFT display, limited connectivity/smart features. Some owners report engine heat and vibration issues, especially in city traffic or at higher rpm. Braking feedback and road presence could be better according to some reviews — though decent, they don’t always match rivals in sharpness. Service and dealer network may not be as extensive as mass-market brands in some regions; parts/service cost can be higher. Mileage in heavy city usage can dip (~22‐25 km/l), which may be less than what some buyers expect from a 400 cc bike. |
| Detailed Overview | The KTM 50 SX is a purpose-built mini motocross bike, tailored primarily for very young and beginner racers who want to get a genuine motocross experience without jumping straight to bigger bikes. It’s more than just a “toy” — KTM has packed serious race-bike DNA into this 50cc model, making it a standout choice for youth motocross training and competitive racing. At the heart of the 50 SX is a 49.9 cc single-cylinder 2-stroke engine, which delivers a punchy yet manageable power output. According to KTM’s specs, this engine is paired with a centrifugal automatic clutch, meaning there’s no manual clutch lever to worry about — the clutch engages automatically, which is ideal for young riders still building coordination and confidence. The engine uses a Seletra 2p D36 system for fuel delivery (on some models), which helps in precise tuning and reliable performance. KTM has thoughtfully designed the chassis for both strength and agility. The frame is made from chromoly steel, which keeps it light but sturdy. The overall design ensures that the bike is highly maneuverable, making it easier for young riders to learn balance and control on a real race-ready structure. The 50 SX isn’t just about motor and frame — it comes with serious suspension too: a WP XACT 35 mm upside-down fork at the front and a WP mono‑shock at the rear.The front suspension travel is around 200 mm and the rear is close to 190 mm, giving enough give for track bumps and jumps. In terms of ergonomics, the seat height is just 653 mm, making it very accessible for younger riders. Ground clearance is around 233 mm, giving the bike enough space to handle uneven terrain without scraping too much.The fuel tank capacity is modest — 2.3 liters — but that’s more than enough for short motocross sessions that young riders typically do. For braking, KTM hasn’t compromised: the 50 SX is equipped with disc brakes both front and rear, each 160 mm in size. This provides good stopping power and control, which is very important for safety and learning advanced braking techniques. On the wheels front, the bike uses spoke wheels, keeping things light and rugged for off-road racing. Despite its small size, the 50 SX is very race-focused. The frame has been redesigned to mimic the flex and rigidity characteristics of full-size MX bikes. The new frame also comes with frame protectors, which help reduce damage in case of falls — a common occurrence when young riders are learning. The handlebars are lightweight aluminum, with a bend that suits smaller riders, and the footpegs are designed to give a solid grip even when things get muddy or rough. KTM also includes power-reduction kits in its parts catalog for the 50 SX. These kits let parents or coaches limit the power output while the rider is still learning, which is a smart way to scale the bike’s performance to the rider’s ability — and once they’re better, the full power can be unlocked. When it comes to reliability, the 50 SX has a liquid cooling system for better thermal management. The engine’s central crankshaft design helps in keeping the mass well-balanced, which contributes to smoother handling. As for maintenance, like all 2-stroke motorcycles, it does need regular care — but KTM has made key parts (like the clutch) durable, using a reinforced clutch basket for longevity. Overall, the KTM 50 SX is a very well-engineered youth motocross bike that brings real race performance to younger riders. It balances power, weight, and control in a way that helps beginners grow into serious racers. Whether for track training, competitive racing, or just building early riding skills, it’s absolutely one of the top choices in the mini-moto world. | The Triumph Speed 400 MY25 represents Triumph’s entry into the competitive mid-capacity roadster segment, developed in collaboration with Bajaj Auto to make the brand more accessible to Indian riders. This motorcycle combines classic British design language with modern engineering, offering a perfect balance of style, performance, and everyday usability. At its heart lies a 398.15 cc liquid-cooled, single-cylinder DOHC engine that produces 40 PS of power and 37.5 Nm of torque, paired with a six-speed gearbox. The engine is smooth and responsive, providing excellent mid-range performance ideal for both city commuting and highway cruising. In terms of design, the Speed 400 MY25 carries Triumph’s signature modern-classic aesthetic — a sculpted fuel tank, premium dual-tone paint finish, round LED headlamp, gold-anodized USD forks, and neatly integrated body panels. The attention to detail and build quality stand out clearly, giving it a premium presence that outshines many rivals in the sub-400 cc category. The ergonomics are well-balanced, with a seat height of 803 mm and a slightly upright handlebar position, ensuring comfort for both short and tall riders. The bike feels stable and planted, thanks to its well-tuned chassis and suspension setup that includes 43 mm Big-Piston upside-down forks at the front and a preload-adjustable monoshock at the rear. Feature-wise, Triumph has equipped the Speed 400 MY25 with several advanced components such as ride-by-wire throttle, switchable traction control, dual-channel ABS, slipper and assist clutch, and all-LED lighting. The semi-digital instrument cluster combines a classic analogue speedometer with a modern LCD display that shows essential ride information. These features make it a perfect blend of retro appeal and modern practicality. The bike’s wet weight of 179 kg and 13-litre fuel tank contribute to an accessible and manageable riding experience. On average, riders can expect a real-world mileage of around 29 km/l, depending on riding conditions. On the road, the Speed 400 impresses with its agility and smooth handling. The power delivery is linear, and the bike feels confident through corners, maintaining Triumph’s reputation for refined ride quality. The braking system, featuring a 300 mm front disc with a radial caliper and a 230 mm rear disc, provides excellent stopping power and control. Despite its strengths, the bike has a few trade-offs. The 13-litre fuel tank limits long-distance touring range, and while the engine is refined, it can generate noticeable heat in stop-and-go city traffic. Additionally, Triumph’s service network, though growing, is still smaller compared to established Indian brands, and maintenance costs are relatively higher. Overall, the Triumph Speed 400 MY25 stands out as a premium yet practical motorcycle for riders seeking an engaging and refined 400 cc experience. It offers a strong value proposition by combining British craftsmanship, robust performance, and modern technology at a competitive price point of around ₹2.33 lakh (ex-showroom). For enthusiasts who want a stylish, fun-to-ride, and easy-to-handle bike that carries Triumph’s prestige, the Speed 400 MY25 is one of the most compelling options in its segment. |
| Expert Review | MotoAutiv Team | MotoAutiv Team |
| FAQ (Manual Override) | Q: What is the engine capacity of the KTM 50 SX? A: It has a 49.9 cc 2-stroke engine. Q: What kind of transmission does it use? A: The KTM 50 SX has a single-speed automatic transmission. Q: How is the KTM 50 SX started? A: It uses a kick-start. Q: Does it have a clutch? A: Yes — a centrifugal (adjustable) clutch, so the rider doesn’t have to use a manual clutch lever. Q: What is the fuel tank capacity? A: The fuel tank capacity is 2.3 litres. Q: What is the seat height? A: The seat height is 653 mm. Q: What is the weight of the bike? A: The dry (or “without fuel”) weight is about 43.5 kg for recent models. Q: What kind of suspension does the KTM 50 SX use? A: It comes with WP XACT suspension — a 35 mm upside-down fork in the front and a WP mono-shock at the rear. Q: What brakes does it have? A: It has disc brakes both at the front and rear, each 160 mm. Q: What power does the KTM 50 SX produce? A: The KTM 50 SX produces around 5.3–5.4 PS at ~11,500 rpm. Q: Is the KTM 50 SX road legal? A: No — it's designed for off-road / motocross use, not for street-legal riding. Q: What kind of clutch does it have for young riders? A: It uses a centrifugal clutch, which automatically engages at high RPM — good for beginners or young riders who don’t manually operate a clutch. Q: What is the ground clearance? A: The ground clearance is 233 mm. Q: Is there a guarantee or warranty for KTM 50 SX? A: According to specs, it has a 2-year standard warranty. Q: What is the typical maintenance challenge or issue to watch for? A: Some owners report carburetor tuning issues | Q: What is the engine capacity of the Triumph Speed 400 MY25? A: The engine capacity is 398.15 cc, liquid-cooled, single-cylinder. Q: How much power and torque does the Speed 400 MY25 produce? A: It produces 40 PS (39.5 bhp) at 8,000 rpm and 37.5 Nm of torque at 6,500 rpm. Q: What is the seat height of the Speed 400 MY25? A: The seat height is 803 mm. Q: What is the ex-showroom price of the Speed 400 MY25 in India? A: The price starts from around ₹2.33 lakh (ex-showroom) in India. Q: What are the key features or technology onboard the Speed 400 MY25? A: It includes ride-by-wire throttle, switchable traction control, Bosch dual-channel ABS, LED lighting, analogue speedo with LCD display, torque-assist clutch and high-spec suspension components. ([91Wheels][3]) Q: What is the fuel tank capacity and wet weight of the Speed 400 MY25? A: The fuel tank capacity is 13 litres, and the wet weight is approximately 179 kg. Q: What kind of suspension and brakes does the Speed 400 MY25 have? A: It uses 43mm upside-down Big-Piston front forks and a preload-adjustable rear monoshock; braking is via a 300mm front disc with four-piston radial caliper plus a 230mm rear disc, both with ABS. Q: What is the fuel economy/mileage expectation of the Speed 400 MY25? A: Official fuel-consumption figures aren’t fully representative, but real-world owners report around 25-30 km/l depending on riding conditions (since Euro emissions data is cited). |
| Price Variants | | 475000 | Standard | 233754 |
| Pros | Very Lightweight: Makes it easy for young riders to handle and build confidence. Automatic Transmission: The centrifugal clutch and automatic gearbox simplify riding for beginners. Adjustable Suspension: High-quality WP fork and shock can be tuned to rider weight and track conditions. Racing‑Oriented Build: Frame and components are derived from KTM’s full-size SX range, giving a race-ready feel. Power-Reduction Kits Available: Helps beginners by limiting power until they’re ready for more. Good Cooling: Liquid cooling ensures the engine stays healthy even under hard off‑road use. Tool-Free Adjustability: Seat height, suspension, and other parts can be adjusted without special tools. | Excellent build quality, fit & finish — many owners appreciate the premium feel and attention to detail. Strong and tractable 398 cc engine generating ~39.5 bhp and 37.5 Nm torque — good mid-range punch and usable in city + highway riding. Good handling and agility; the chassis and suspension setup are well tuned for both traffic and open roads. Comfortable ergonomics for a variety of riders — the seat height (~803 mm) and riding position are more accessible than some larger bikes. Competitive pricing in its segment for what you get (premium brand, performance, features). |
| Transmission | Manual | 6 Speed Manual |
