Price starts at ₹475,000 for 1 variants
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.
| Variant Name | Ex-Showroom Price | Action |
|---|---|---|
KTM 50 SX |
₹475,000 |
Get On-Road Price |
| Engine Type | 1-cylinder, 2-stroke engine |
| Displacement | 49.9 cc |
| Max Power | 5.3 bhp @ 11500 rpm |
| Max Torque | 5.2 Nm @ 7500 rpm |
| Transmission | Manual |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm |
| Rear Suspension | XACT WP mono shock |
| Front Brake | Disc 160 mm |
| Rear Brake | Disc 160 mm |
| Front Tyre | 60/100 - 12 |
| Rear Tyre | 2.75 - 10 |
| Kerb Weight | 41 kg kg |
| Seat Height | 653 mm mm |
| Fuel Tank | 2.3 L |
It has a 49.9 cc 2-stroke engine.
The KTM 50 SX has a single-speed automatic transmission.
It uses a kick-start.
Yes — a centrifugal (adjustable) clutch, so the rider doesn’t have to use a manual clutch lever.
The fuel tank capacity is 2.3 litres.
The seat height is 653 mm.
The dry (or “without fuel”) weight is about 43.5 kg for recent models.
It comes with WP XACT suspension — a 35 mm upside-down fork in the front and a WP mono-shock at the rear.
It has disc brakes both at the front and rear, each 160 mm.
The KTM 50 SX produces around 5.3–5.4 PS at ~11,500 rpm.
No — it's designed for off-road / motocross use, not for street-legal riding.
It uses a centrifugal clutch, which automatically engages at high RPM — good for beginners or young riders who don’t manually operate a clutch.
The ground clearance is 233 mm.
According to specs, it has a 2-year standard warranty.
Some owners report carburetor tuning issues
