Quick Analysis
KTM 50 SX
6.5 pts
Unweighted: 3 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
SUZUKI GIXXER SF 250/ GIXXER 250
27.5 pts
Unweighted: 21 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Displacement | 49.9 cc | 249cm³ |
| Engine Type | 1-cylinder, 2-stroke engine | 4-Cycle, 1-cylinder, Oil cooled |
| Power | 5.3 bhp @ 11500 rpm | 26.13 bhp @ 9300 rpm |
| Torque | 5.2 Nm @ 7500 rpm | 22.2 Nm @ 7,300 rpm |
Performance & Efficiency |
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| Fuel Tank Capacity | 2.3 L | 12 L |
| Mileage | 30 kmpl | 35 kmpl |
Dimensions & Weight |
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| Kerb Weight | 41 kg | 161 kg |
| Seat Height | 653 mm | 800mm |
Brakes & Suspension |
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| ABS | — | Dual Channel |
| Front Brake | Disc 160 mm | Disc 300 mm Front 2 Piston |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm | Telescopic |
| Rear Brake | Disc 160 mm | Disc 220 mm Real 1 Piston |
| Rear Suspension | XACT WP mono shock | Monoshock |
Tyres & Wheels |
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| Front Tyre | 60/100 - 12 | 110/70R17M/C 54S |
| Rear Tyre | 2.75 - 10 | 150/60R17M/C 66S |
| Tyre Type | Tubed | Tubeless |
| Wheel Type | Spoke | Alloy |
Features & Technology |
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| Headlight | — | LED |
Other Specifications |
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| Battery | — | Maintenance free, 12V 6Ah |
| Bike Image 1 | — | https://motoautiv.com/wp-content/uploads/2025/11/gixxersf250metmatblackmetmatbordeauxred.webp |
| Bike Image 2 | — | https://motoautiv.com/wp-content/uploads/2025/11/gixxersf250metallicmatteblack.webp |
| Color Options | Electronic Orange | Met Triton Blue / Pearl Glacier White Met Mat Black / Met Mat Bordeaux Red Metallic Matte Black |
| 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. | Fuel tank capacity is modest, which limits long-distance range between fill-ups. It’s not built for rough off-road or hardcore touring — more suited for smooth roads and occasional rough patches. As a 250-class bike, performance is modest compared to larger motorcycles — may feel underpowered for those seeking outright speed or heavy touring. Rear suspension setup and seat may feel basic for very long rides or heavy pillion + luggage combos. Fuel efficiency and mileage will depend heavily on riding style — aggressive riding can reduce the “balanced” efficiency benefit. |
| 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. | Riding the Gixxer SF 250 feels like driving a well-tuned middle-shafted balance between everyday usability and sporty flair. Under its sleek fairing lives a 249 cc single-cylinder, 4-stroke, oil-cooled engine with SOHC and fuel injection. With a bore and stroke of 76 mm by 54.9 mm, this engine generates about 26.5 PS at 9,300 rpm and around 22.2 Nm of torque at 7,300 rpm. What this translates into on the road is a friendly yet spirited ride — you don’t get a sudden, harsh surge of power but a smooth, linear and predictable pull once you twist the throttle. That makes city commutes relaxed and manageable, and when you open it up on highways or open roads, the engine responds eagerly enough to keep pace comfortably. Paired with a 6-speed manual gearbox and electric start, the Gixxer SF 250 makes everyday usability straightforward. Shifting through gears is light and intuitive, which helps in stop-and-go traffic as well as during overtakes. The oil-cooling keeps engine temperature under control, which means you can expect stable performance even when traffic snarls or you’re riding under Indian weather conditions. Physically, the bike has a compact yet sporty stance. With an overall length of 2,010 mm, width of 740 mm, height around 1,035 mm, and a wheelbase of 1,345 mm, it’s nimble enough to weave through city lanes yet stable enough for open roads. Seat height at 800 mm offers decent ground reach for many riders, while the kerb weight of about 161 kg strikes a balance — light enough for urban handling, but heavy enough to feel planted at speed. Ground clearance is 165 mm, which helps in dealing with broken patches, speed-breakers or uneven surfaces common on many Indian roads. The suspension setup — telescopic front forks and a rear swing-arm monoshock — brings a comfortable ride over a variety of surfaces. On city potholes or rough patches, it absorbs most of the bumps without transferring harshness to your seat. On smoother roads or while cruising, the suspension doesn’t feel floaty; the bike remains stable and confidence-inspiring when you push a little harder. Stopping power comes from disc brakes on both ends, supported by dual-channel ABS. That gives a usable level of braking confidence — whether you’re slowing down in traffic or braking suddenly on a slippery surface, the bike stays composed, and ABS helps prevent wheel lock-up, adding a layer of safety many riders appreciate. The tyres — 110/70-17 at the front and 150/60-17 at the rear, on cast alloy wheels — deliver a balanced grip/play between city and open-road riding. They help the bike stay agile at lower speeds yet stable when leaning a bit during spirited riding. The ride feels planted and predictable, not twitchy. Practical touches add to the everyday value of the SF 250. The 12-litre fuel tank may seem modest, but given the engine size and its reasonable fuel demand, it’s adequate for city-to-highway rides without making the bike heavy. The electricals — including LED headlamp and tail-light — give modern looks and better visibility at night. The presence of a digital instrument console adds convenience for riders wanting clear readouts without fuss. In short: the bike doesn’t pretend to be over-equipped, but gives you the essentials done right. What emerges from the combination of all these details is a motorcycle that doesn’t force you to choose between practicality and fun. For daily commuting, traffic weaving, and city errands, it stays light, nimble, and easy. For weekend rides, open roads, or spirited bursts, it has enough in reserve to keep things engaging. It doesn’t carry the bulk of a heavyweight tourer nor the ferocity of a high-end sportsbike — but therein lies its charm: it’s a genuine “do-it-all” middle-class street-sport machine that doesn’t sacrifice comfort for performance. For a rider in real-life Indian conditions — where you might deal with crowded city streets, potholed roads, occasional long stretches and mixed traffic — the Gixxer SF 250 behaves like a well-rounded companion. It’s not an extreme performer, but a balanced, sensible machine that gives you flexibility, reliability and enough thrill for a variety of riding situations. If you want a bike that feels at home in traffic, yet doesn’t shy away from open roads — the Gixxer SF 250 delivers exactly that. |
| 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 mileage? A: The mileage is around 35–38 kmpl under normal mixed usage. Q: What is the fuel tank capacity? A: The fuel tank capacity is 12 litres. Q: What is the seat height? A: The seat height is 800 mm. Q: What is the kerb weight? A: The kerb weight is approximately 161 kg. Q: Does it have disc brakes and ABS? A: Yes — it comes with disc brakes front and rear and dual-channel ABS. Q: What size tyres does it use? A: The front tyre size is 110/70-17 and the rear tyre size is 150/60-17. Q: What is the engine displacement and power? A: The engine is a 249 cc single-cylinder oil-cooled unit producing roughly 26.5 PS and 22.2 Nm torque. Q: What kind of suspension does it have? A: It has telescopic front forks and a monoshock rear suspension. |
| Fuel System | — | Fuel Injection |
| Price Variants | | 475000 | | 192051 |
| 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. | Smooth and manageable 249 cc engine — good balance of enough power for city and highway without being intimidating. Light, nimble handling and reasonable kerb weight make it easy to maneuver in traffic and tight spaces. Comfortable seat height and posture for both city rides and longer journeys. Suspension does a decent job of absorbing bumps and uneven surfaces, giving a comfortable ride even on rough roads. Disc brakes front and rear with dual-channel ABS provide dependable stopping power and added safety. A good balance of sporty feel and everyday usability — suitable for daily commutes as well as occasional spirited rides. |
| Starter | — | ELECTRIC |
| Transmission | Manual | 6- speed |
