Quick Analysis
KTM 50 SX
10.5 pts
Unweighted: 5 advantages
EnginePerformanceDimensionsBrakesTyresOther
JAWA BOBBER
20.0 pts
Unweighted: 16 advantages
EnginePerformanceDimensionsBrakesTyresOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Displacement | 49.9 cc | 334 cc |
| Engine Type | 1-cylinder, 2-stroke engine | Single Cylinder, 4 Stroke, Liquid Cooled, DOHC |
| Power | 5.3 bhp @ 11500 rpm | 29.9 PS |
| Torque | 5.2 Nm @ 7500 rpm | 30 Nm |
Performance & Efficiency |
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| Fuel Tank Capacity | 2.3 L | 12.5 L |
| Mileage | 30 kmpl | 30 kmpl |
Dimensions & Weight |
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| Kerb Weight | 41 kg | 185 kg |
| Seat Height | 653 mm | 740 mm |
Brakes & Suspension |
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| ABS | — | Dual Channel |
| Front Brake | Disc 160 mm | 280 mm |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm | Telescopic Forks, Ø 35 mm |
| Rear Brake | Disc 160 mm | 240 mm |
| Rear Suspension | XACT WP mono shock | Mono Shock Absorber, Gas Filled with 7-Step Adjustable Preload |
Tyres & Wheels |
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| Front Tyre | 60/100 - 12 | 100/90-18, 56H |
| Rear Tyre | 2.75 - 10 | 140/70-17, 66H |
| Tyre Type | Tubed | Tube |
| Wheel Type | Spoke | Spoke |
Other Specifications |
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| Bike Image 1 | — | https://motoautiv.com/wp-content/uploads/2025/11/42bobbermysticcopper.webp |
| Bike Image 2 | — | https://motoautiv.com/wp-content/uploads/2025/11/42bobberjasperred.webp |
| Bike Image 3 | — | https://motoautiv.com/wp-content/uploads/2025/11/42bobberredsheen.webp |
| Bike Image 4 | — | https://motoautiv.com/wp-content/uploads/2025/11/42bobberblackmirror.webp |
| Color Options | Electronic Orange | Mystic Copper Moonstone White Jasper Red Deep Black Matte Red Clad Black Mirror |
| 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. | Single-seat limitation: It cannot carry a pillion, which might be a deal-breaker for riders who need two-up capability. Stiff rear suspension for some riders: On rough city roads, the suspension may feel firmer than expected, especially at lower speeds. Engine heat in traffic: The 334cc motor tends to generate noticeable heat during slow, bumper-to-bumper riding. Limited practicality: The bobber design restricts storage options, luggage mounting, and everyday utility compared to standard bikes. Smaller fuel tank: Longer highway rides may require more frequent fuel stops. Slightly heavy in tight spaces: While stable on the highway, its weight can be felt during U-turns or slow maneuvering. |
| 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 Jawa 42 Bobber never quite feels ordinary — it’s a machine that makes a statement the moment you swing your leg over. The soul of this bike lies in its 334 cc single-cylinder, liquid-cooled, DOHC engine. That’s not just a handful of numbers — it’s a heart that delivers smooth throttle response, and more importantly, a strong mid-range punch. In day-to-day riding, whether you’re crawling through traffic or cruising on a highway, this engine delivers usable power without needing to be pushed hard. The 6-speed gearbox, paired with an assist-and-slipper clutch, makes gear changes feel refined. In the city, that helps — when you’re changing gears frequently, the clutch bite is lighter than on many cruiser-style bikes, but you still feel solid when opening up on open roads. The fuel injection system ensures consistent delivery of fuel, which helps with efficiency and makes sure power comes smoothly, with no surprise jerks or hesitation. On the road, the bike feels planted. Its low seat height — just 740 mm — makes it easy to touch the ground when stopped, which is a great confidence booster if you’re navigating crowded streets or tight parking situations. The wheelbase is long (1,485 mm), which helps stability when cruising, but the bike doesn’t feel cumbersome because its kerb weight (~185 kg) provides solidity without being overly heavy. The balance between comfort and control is nicely struck. Suspension is tuned just right for mixed urban and semi-highway conditions: telescopic front forks and a mono-shock with 7-step preload adjustment at the rear give you enough compliance for bumps, while remaining firm enough to feel stable through turns or during spirited rides. The preload adjustment is a thoughtful feature — if you occasionally carry a load or ride over rougher roads, you can tweak things to suit. Braking inspires confidence. With disc brakes on both front and rear, and dual-channel ABS, the Bobber gives you reliable stopping power. Whether you’re easing off at speed or needing to brake hard in sudden traffic, the system helps prevent wheel lock-up, which adds a layer of safety that’s especially helpful for less aggressive riders. Fuel tank capacity sits at 12.5 litres — not massive, but enough for a fair mix of city use and occasional weekend rides. You’ll want to plan fuel stops if you ride long distances, but for daily use it’s quite reasonable. Ergonomically, the Bobber leans into a relaxed cruiser stance. The forward-set footpegs, wide handlebars, and low seat invite a laid-back posture that’s ideal for relaxed rides, not aggressive sporty cornering. The single-seat layout reinforces that cruiser identity — it’s clearly made for solo riding, and not for pillion passengers. On the practical side, the 42 Bobber includes a modern digital instrument console, LED lighting, electric start, and useful indicators like low fuel. These touches bring a classic-looking bobber into the modern age without spoiling the minimal charm — you get just enough tech to feel contemporary, without unnecessary frills. If you ask whether this bike is for someone who just needs a daily commuter — it could be, but it truly shines when you treat it as a style cruiser. It’s less about beating traffic times or getting the most for every rupee of fuel, and more about enjoying the ride: the growl of its exhaust, the planted feel at speed, the freedom of minimal styling. For someone who values character, presence, and the feel of a modern classic, the Jawa 42 Bobber is a compelling pick. |
| 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 26–32 kmpl in real-world riding. Q: What is the seat height? A: The seat height is 740 mm. Q: Can the Jawa 42 Bobber carry a pillion? A: No, it is a single-seat motorcycle designed only for solo riding. Q: What is the engine capacity? A: It has a 334 cc liquid-cooled single-cylinder engine. Q: Does the bike overheat in traffic? A: No, the liquid cooling system keeps temperatures stable even in slow traffic. Q: Is it good for long rides? A: It is suitable for medium-distance rides but not ideal for very long touring due to its single seat and 12.5L tank. Q: What is the weight of the bike? A: The kerb weight is around 185 kg. Q: Does it have ABS? A: Yes, it comes with dual-channel ABS. Q: What is the fuel tank capacity? A: The fuel tank capacity is 12.5 litres. Q: Is the Jawa 42 Bobber beginner-friendly? A: Yes, it is manageable for new riders, thanks to its low seat height and smooth power delivery. Q: What is the top speed? A: The top speed is approximately 130 km/h. Q: How many gears does it have? A: It has a 6-speed gearbox. Q: Is the maintenance expensive? A: Maintenance is moderate and similar to other 300–400cc premium bikes. Q: What is the warranty period? A: It comes with a warranty of 4 years or 50,000 km, extendable up to 6 years. Q: What is the on-road price? A: Depending on location and variant, it usually falls between ₹2.30 lakh and ₹2.60 lakh on-road. |
| Price Variants | | 475000 | | 193000 |
| 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. | Unique factory-custom look: The 42 Bobber stands out with its low-slung stance, chunky tyres, single seat, and retro-custom appeal that usually requires aftermarket work on other bikes. Strong low-end performance: Its 334cc engine delivers good torque early in the rev range, making city riding feel effortless and lively. Comfortable riding position: The forward-set footpegs and wide handlebars create a relaxed, cruiser-like posture suitable for long and easy rides. Good road presence: The bike’s muscular tank, floating seat, and overall proportions make it feel more premium and eye-catching than typical 300–400cc motorcycles. Adjustable seat: The adjustable seat height is a rare and practical feature, helping riders of different heights find a comfortable stance. Improved brakes and suspension: The combination of discs with dual-channel ABS and a well-tuned suspension setup provides confident braking and a stable ride. Modern features: A digital console, LED lights, slipper clutch, and USB charging add convenience without breaking the retro charm. |
| Transmission | Manual | 6–Speed |
