Quick Analysis
KTM 50 SX
14.5 pts
Unweighted: 7 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
KTM 390 ENDURO R
20.0 pts
Unweighted: 13 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | — | Liquid Cooled |
| Displacement | 49.9 cc | 398.63 cc |
| Engine Type | 1-cylinder, 2-stroke engine | Single-cylinder, 4-stroke, liquid-cooled, DOHC |
| Power | 5.3 bhp @ 11500 rpm | 46 @ 8500 |
| Torque | 5.2 Nm @ 7500 rpm | 39 @ 6500 |
Performance & Efficiency |
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| Fuel Tank Capacity | 2.3 L | 9 |
| Mileage | 30 kmpl | 29.4 kmpl |
Dimensions & Weight |
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| Kerb Weight | 41 kg | 177 |
| Seat Height | 653 mm | 860 |
Brakes & Suspension |
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| ABS | — | Dual Channel ABS |
| Front Brake | Disc 160 mm | 285 |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm | Fully Adjustable WP Apex Upside-down Forks |
| Rear Brake | Disc 160 mm | 240 |
| Rear Suspension | XACT WP mono shock | WP Monoshock with Preload and Rebound Adjustment |
Tyres & Wheels |
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| Front Tyre | 60/100 - 12 | 90/90-21 M/C 54 S |
| Rear Tyre | 2.75 - 10 | 140/80B 18 M/C |
| Tyre Type | Tubed | Tubed |
| Wheel Type | Spoke | Spoke |
Features & Technology |
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| Headlight | — | LED headlamp |
Other Specifications |
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| Color Options | Electronic Orange | Orange |
| 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. | Relatively heavy for a dual-sport / off-road bike: 177 kg kerb weight. Low-end torque is not very strong; engine feels dull at low RPMs. Rear shock only has rebound adjustment, no compression adjust — limits its tuning for aggressive off-road use. Kickstand safety switch design issue: possible accidental shutdown if kickstand is nudged. Some reports of stalling when using the quick-shifter, especially at lower revs. TFT screen is small and lacks some info (e.g. no fuel gauge, per reviews). High price: considered a bit premium for an “entry‑level” off-road-focused machine. |
| 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 KTM 390 Enduro R is KTM’s intention to build a true dual‑sport / light enduro motorcycle that blends its 390‑series performance with genuine off-road capability. Launched in India for around ₹ 3.36 lakh (ex-showroom), it’s positioned as a more rugged and off-road‑oriented alternative to the 390 Adventure, bringing serious trail-ready features in a relatively light package. At its core lies a 399 cc single‑cylinder, liquid-cooled LC4c engine, producing about 46 PS at 8,500 rpm and 39 Nm of torque at 6,500 rpm, according to KTM’s Indian spec. This engine is shared with the 390 Duke / Adventure, but in the Enduro R the tuning and gearing favor low‑to-mid range grunt — especially useful when riding off-road. Power is sent through a 6-speed gearbox with a mechanically operated slipper (or “assist/slipper”) clutch, giving it both durability and good control in uneven terrain. In terms of suspension, the India-spec Enduro R features WP APEX upside-down forks with 200 mm of travel up front, and a WP APEX split-piston shock at the rear with 205 mm of travel. While this is slightly less than the international spec, these settings are already tuned for a good balance of on-road stability and off-road absorption. The chassis uses a steel trellis frame and a die-cast aluminium swingarm, giving a rigid but relatively lightweight base to handle rough terrain with confidence. The Enduro R’s ergonomics clearly reflect its off-road wiring: it has a single-piece, flat, rally-style seat, allowing the rider to move position easily while standing or sitting. Bajaj Auto Its seat height is 860 mm, which is lower than many other dual-sport bikes, making it more accessible — especially for the Indian market. HT Auto It also offers a respectable ground clearance of 253 mm, helping clear obstacles and uneven terrain. HT Auto The bike rides on 21″ front and 18″ rear spoked wheels, fitted with Mitas Enduro Trail tyres for grip on unpaved surfaces. drivespark.com Braking is handled by disc brakes both front (285 mm) and rear (240 mm), and the bike comes equipped with dual-channel ABS that can be switched to an Off-road mode or even turned off at the rear for more controlled sliding. Bajaj Auto On the tech front, the 390 Enduro R doesn’t disappoint: it gets a 4.2″ anti-glare TFT display with Bluetooth connectivity, turn-by-turn navigation, music and call controls, and a USB-C charging port. Bajaj Auto There are two ride modes — Street and Off-road — which adjust throttle response and ABS settings. drivespark.com Traction control is also present, helping maintain grip on slippery off-road terrain. Bajaj Auto Fuel capacity is modest, with a 9-litre tank, which helps keep the weight down and the bike nimble. Bajaj Auto Speaking of weight, the kerb weight is 177 kg for the Indian spec, which is quite respectable given the off-road-ready components and protection gear. The Financial Express Overall, the KTM 390 Enduro R is a well-balanced machine that feels at home both on asphalt and dirt. It offers real off-road capability without compromising too much on daily usability. For those looking for a lightweight but powerful bike for trail riding, weekend adventure escapes, or even mixed commuting, this model is a compelling pick. Its feature-rich design and KTM’s proven engine make it a strong entry into serious dual-sport territory. |
| 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 engine does the KTM 390 Enduro R have? A: It has a 398.63 cc single-cylinder, 4-stroke, liquid-cooled DOHC engine. Q: How much power and torque does it produce? A: It produces 46 PS at 8,500 rpm and 39 Nm of torque at 6,500 rpm (India-spec). Q: What is the transmission setup? A: It comes with a 6-speed gearbox and a mechanically operated slip‑and‑assist clutch. Q: What kind of suspension does it have? A: - Front: 43 mm WP APEX inverted fork, adjustable for compression and rebound. Rear: WP APEX split-piston shock, adjustable preload and rebound. Q: What is the wheel and tyre configuration? A: It runs on 21″ front and 18″ rear spoke wheels, with off-road / dual‑sport tyres. Q: How high is the seat, and what is the ground clearance? A: Seat height for the India‑spec version is 860 mm, and ground clearance is 253 mm. Q: What is the fuel tank capacity? A: The motorcycle has a 9-litre fuel tank. Q: What is the kerb (wet) weight? A: The kerb weight is 177 kg for the India‑spec model. Q: What brakes does it use? A: It has a 285 mm front disc and 240 mm rear disc, with dual‑channel ABS and a switch to turn off rear ABS. Q: Does it have riding modes and other electronics? A: Yes — it supports Street and Off-road riding modes, switchable ABS, traction control, and has a 4.2″ TFT display with Bluetooth connectivity (turn‑by‑turn navigation, calls, music) and USB‑C charging. Q: What is the mileage / fuel efficiency? A: The ARAI-rated mileage is about 29.4 kmpl according to specs. Q: Is this bike more for off-road or street use? A: It’s designed as a dual-sport / enduro bike, meant to handle both on-road riding and serious off-road terrain. Q: When was the KTM 390 Enduro R launched in India? A: It was launched in India in April 2025. |
| Price Variants | | 475000 | | 339227 |
| 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. | Powerful 399 cc LC4c engine with good performance for both road and light off-road. Very smooth single-cylinder engine (thanks to a balancer shaft) with reduced vibration. Two ride modes (Street / Off-road) with adjustable ABS and traction control. Good feature list: TFT display with Bluetooth, quickshifter, USB‑C port. Adjustable suspension (43 mm WP Apex fork + WP shock) allows tuning for different terrain. Comfortable ergonomics: upright posture, narrow mid-section, rally-style seat. Decent fuel range: 9‑litre tank gives a claimed range of ~180‑190 km. Very good value: feature-rich dual-sport bike at a competitive price. |
| Transmission | Manual | 6 Speed Manual |
