Quick Analysis
KTM 50 SX
5.0 pts
Unweighted: 2 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
TRIUMPH STREET TRIPLE 765 R
32.5 pts
Unweighted: 21 advantages
EnginePerformanceDimensionsBrakesTyresFeaturesOther
| Specification | ||
|---|---|---|
Engine Specifications |
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| Cooling System | — | Liquid-cooled |
| Displacement | 49.9 cc | 765 cc |
| Engine Type | 1-cylinder, 2-stroke engine | 12 valve, DOHC, inline 3-cylinder |
| Power | 5.3 bhp @ 11500 rpm | 120 PS / 118.4 bhp (88.3 kW) @ 11,500 rpm |
| Torque | 5.2 Nm @ 7500 rpm | 80 Nm @ 9,500 rpm |
Performance & Efficiency |
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| Fuel Tank Capacity | 2.3 L | 15 L |
| Mileage | 30 kmpl | 19 Kmpl |
Dimensions & Weight |
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| Kerb Weight | 41 kg | 189 |
| Seat Height | 653 mm | 826 mm |
Brakes & Suspension |
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| ABS | — | Dual Channel |
| Front Brake | Disc 160 mm | Twin 310 mm floating discs |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm | Showa 41 mm upside down Separate Function Forks |
| Rear Brake | Disc 160 mm | Single 220 mm disc |
| Rear Suspension | XACT WP mono shock | Showa piggyback reservoir Monoshock |
Tyres & Wheels |
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| Front Tyre | 60/100 - 12 | 120/70 ZR 17 |
| Rear Tyre | 2.75 - 10 | 180/55 ZR 17 |
| Tyre Type | Tubed | Tubeless |
| Wheel Type | Spoke | Alloy |
Features & Technology |
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| Headlight | — | DRLs LED |
Other Specifications |
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| Bike Image 1 | — | https://motoautiv.com/wp-content/uploads/2025/11/street-triple-r-my26-phantom-black-rhs-629.webp |
| Bike Image 2 | — | https://motoautiv.com/wp-content/uploads/2025/11/street-triple-r_my25_pure-white_rhs_629px.webp |
| Cluster | — | Color TFT Screen |
| Color Options | Electronic Orange | Matt Baja Orange | #f55e00 Phantom Black | #121112 Pure White | #ffffff |
| 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. | Minimal wind protection that makes high-speed riding difficult The taller seat height may be uncomfortable for shorter riders Premium parts mean higher service and maintenance costs Low ground clearance can cause scraping on big speed breakers/rough roads |
| 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 Street Triple 765R is an exciting naked bike of a mid range. Along with offering daily comfort, it also provides a sporty performance. It possesses a 765cc triple engine. With this, bikers can get a strong low-end pull, a mid-range, and the classic triple sound. Many riders love this sound. This bike is easy to handle and light in weight. Hence, it is perfect for city traffic and cornering on open roads. Its Showa suspension helps in keeping the ride smooth and stable. However, the Brembo M4.32 brakes provide excellent stopping power. Hence, it gives riders confidence in all situations. Made by Triumph Motorcycles, this bike comes with useful electronic features. These include cornering ABS, traction control, ride-by-wire throttle, and multiple modes of riding. Irrespective of the road conditions and weather, anyone can perform well with this bike. Like most naked bikes, you will feel a wind blast at higher speeds. The riding position is sporty and practical. However, its seat height, being 826 mm, can be too high for some riders. All in all, the build quality is good, modern, and of muscular style. The digital instrument cluster is clear, but not a full TFT like the one in the RS model. Moreover, it feels smooth to manage and ride in the cities. This is because of the light clutch action and a precise gearbox. Being a premium manufacturer, the maintenance cost is a bit higher than the competitors. Furthermore, the fuel consumption ranges from 16-17 kmpl. Overall, it is a solid option for those seeking a fun, high-quality, and versatile middleweight naked motorbike. |
| Expert Review | MotoAutiv Team | Nice naked bike with essential feature, good ride quality and a bumble bee look from the front. Lower seat height and bigger fuel tank option could have been better., 4, 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 specification of the Street Triple 765 R? A: It is powered by a 765 cc liquid-cooled, 12-valve, DOHC inline-three engine. Q: What are the power and torque figures for the 765 R? A: The 765 R produces 120 PS (118.4 bhp) at 11,500 rpm and 80 Nm of torque at 9,500 rpm. Q: What is the seat height and weight of the Street Triple 765 R? A: The seat height is 826 mm, and the wet weight is around 189 kg. Q: What is the fuel tank capacity and fuel efficiency? A: The fuel tank size is 15 litres and has the fuel efficiency of 19.2 Kmpl Q: What kind of suspension and brakes are fitted to the 765 R? A: The bike features Showa 41 mm upside-down “Big Piston” front forks (adjustable) and a piggy-back Showa monoshock at the rear. Braking is handled by twin 310 mm Brembo M4.32 radial front discs and a single 220 mm rear disc, both with cornering ABS. Q: What rider aids and instrumentation does the 765 R come with? A: It comes with a colour TFT dashboard, ride-by-wire throttle, multiple riding modes (Road, Rain, Sport, Rider), cornering ABS and traction control. Q: What is the recommended service interval for this model? A: The service interval is 10,000 km (or 6,000 miles) or 12 months, whichever comes first. Q: Is there a low-seat option available for the 765 R? A: Yes, an accessory low seat is available, which drops the seat height by 28 mm. |
| Price Variants | | 475000 | | 1086300 |
| 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. | Easy and great handling Weight and balance are ideal for city traffic/twisty roads High-revving power and exhaust note Increased safety with advanced electronics and multiple ride modes Showa suspension and Brembo brakes offer sharp handling and quick stopping power Solid build quality and reliability with minimal reported issues Versatile machine suitable for daily driving Also, for weekend fun and track days, it is a good option |
| Starter | — | Self |
| Transmission | Manual | 6 speed |
