Sell your bike for cash! Instant valuation • Same-day payment • Free collection Quick valuation & payment
2025 KTM 50 SX
2025 KTM 50 SX image 1
2025 KTM 50 SX image 2
2025 KTM 50 SX image 3
2025 KTM 50 SX image 4

Images are for illustration purposes only. The colours shown on the site may not precisely match the actual colours of the vehicle.

Key Features

KTM 50 SX ADJUSTABILITY - Different adjustability options were built into the 2025 KTM 50 SX construction using scientific statistical data and young racers' input data. Finding the right fit for your little ripper is easy thanks to height-adjustable suspension, handlebar position, subframe, and bodywork, taking the seat height from a low setting of 634mm to a taller setting of 682mm.
1

ADJUSTABILITY

Different adjustability options were built into the 2025 KTM 50 SX construction using scientific statistical data and young racers' input data. Finding the right fit for your little ripper is easy thanks to height-adjustable suspension, handlebar position, subframe, and bodywork, taking the seat height from a low setting of 634mm to a taller setting of 682mm.

KTM 50 SX CARBURETOR - A proven Dell'Orto type PHBG 19 BS carburetor takes prime position in producing the goods in the 2025 KTM 50 SX, with updated settings that work perfectly in harmony with the new engine, exhaust, and air intake design.
2

CARBURETOR

A proven Dell'Orto type PHBG 19 BS carburetor takes prime position in producing the goods in the 2025 KTM 50 SX, with updated settings that work perfectly in harmony with the new engine, exhaust, and air intake design.

KTM 50 SX PERFORMANCE - The 2025 KTM 50 SX features a modern and compact engine using the latest 2-stroke technology. Using a 3-shaft design, the crankshaft is positioned near the center of gravity, which not only benefits mass centralization but also creates the ideal intake angle into the reed valve for top-level performance. An independent cylinder blank allows for a completely new cylinder design, with increased power.
3

PERFORMANCE

The 2025 KTM 50 SX features a modern and compact engine using the latest 2-stroke technology. Using a 3-shaft design, the crankshaft is positioned near the center of gravity, which not only benefits mass centralization but also creates the ideal intake angle into the reed valve for top-level performance. An independent cylinder blank allows for a completely new cylinder design, with increased power.

KTM 50 SX TANK - The KTM 50 SX is ready to fuel the fire in your little ripper with an updated tank design to compliment the new frame concept and bodywork.
4

TANK

The KTM 50 SX is ready to fuel the fire in your little ripper with an updated tank design to compliment the new frame concept and bodywork.

KTM 50 SX AIRBOX AND FILTER - An all-new airbox concept features a conventional suction sleeve made from a hard-wearing polyamide instead of rubber and a Twin Air filter mounting system that now features snap locks for easy and intuitive mounting. The Twin Air filter is also placed under the seat and is easily accessible without any tools by simply removing the seat. It also features improved dirt intrusion resistance, with no more dirt falling into the intake tract when changing the filter.
5

AIRBOX AND FILTER

An all-new airbox concept features a conventional suction sleeve made from a hard-wearing polyamide instead of rubber and a Twin Air filter mounting system that now features snap locks for easy and intuitive mounting. The Twin Air filter is also placed under the seat and is easily accessible without any tools by simply removing the seat. It also features improved dirt intrusion resistance, with no more dirt falling into the intake tract when changing the filter.

KTM 50 SX HANDLEBARS & GRIPS - Hold on tight! The high-quality, tapered, black handlebar is made of lightweight aluminum alloy and ensures top stability, vibration damping, and control. An entirely new bend and profile is designed specifically to meet the needs of young riders, with ODI grips on the left, and a vulcanized ODI grip on the right-side throttle assembly, adding to the overall quality. A crash pad on the handlebar protects the rider from any rough contact or impact with the bars.
6

HANDLEBARS & GRIPS

Hold on tight! The high-quality, tapered, black handlebar is made of lightweight aluminum alloy and ensures top stability, vibration damping, and control. An entirely new bend and profile is designed specifically to meet the needs of young riders, with ODI grips on the left, and a vulcanized ODI grip on the right-side throttle assembly, adding to the overall quality. A crash pad on the handlebar protects the rider from any rough contact or impact with the bars.

KTM 50 SX WHEELS AND TYRES - Rolling off the race rig and into the pit lane, the 2025 KTM 50 SX uses lightweight, black anodized, aluminum rims just like the full-size KTM SX range. These provide the highest levels of strength and reliability, while MAXXIS MX-ST tires deliver outstanding performance on any terrain, along with exceptional straight-line stability.
7

WHEELS AND TYRES

Rolling off the race rig and into the pit lane, the 2025 KTM 50 SX uses lightweight, black anodized, aluminum rims just like the full-size KTM SX range. These provide the highest levels of strength and reliability, while MAXXIS MX-ST tires deliver outstanding performance on any terrain, along with exceptional straight-line stability.

KTM 50 SX FOOTPEGS - All-new, "no-dirt" footrests offer a bigger surface area for improved grip while standing on the pegs, and are less susceptible to hooking up in deep ruts, take-offs when scrubbing, or track barriers.
8

FOOTPEGS

All-new, "no-dirt" footrests offer a bigger surface area for improved grip while standing on the pegs, and are less susceptible to hooking up in deep ruts, take-offs when scrubbing, or track barriers.

KTM 50 SX EXHAUST - A completely new exhaust system, features the same manufacturing process as the full-size 2-stroke KTM SX range, with improved overall quality and performance. This has resulted in massive improvements in thermodynamics. Moreover, improved sealing of the silencer end cap and a new rubber between the header pipe and silencer adds another level of quality to the new exhaust system. The silencer has also been updated and now comes with a black anodized finish and a signature 'Braaaaap!'.
9

EXHAUST

A completely new exhaust system, features the same manufacturing process as the full-size 2-stroke KTM SX range, with improved overall quality and performance. This has resulted in massive improvements in thermodynamics. Moreover, improved sealing of the silencer end cap and a new rubber between the header pipe and silencer adds another level of quality to the new exhaust system. The silencer has also been updated and now comes with a black anodized finish and a signature 'Braaaaap!'.

When the next step up is into the 50cc class, there is no better option than the most powerful 50cc out there. For 2025, the KTM 50 SX is built around an advanced steel frame, housing a powerful engine, a 35mm WP XACT AER fork, a WP XACT monoshock, and an advanced hydraulic Formula brake system. Simply put - it's the most advanced and READY TO RACE 50 cc mini-crosser available to your little racer.

Engine

ENGINE TYPE
1-cylinder, 2-stroke engine
DISPLACEMENT
49 cm³
BORE X STROKE
39.5 mmx40 mm
COMPRESSION RATION
0
RATED OUTPUT
5kw
AIR FILTER
-
MAX. TORQUE
-
LUBRICATION
Oil-mixture lubrication 1:60
FUEL SUPPL
battery
EXHAUST SYSTEM
Aluminium
CERTIFICATION
Other
ELECTRICAL SYSTEM
-
CLUTCH
Centrifugal clutch (adjustable)
GEARBOX
Automatic
FINAL DRIVE
Chain
IGNITION
-
COOLING SYSTEM
Liquid cooled
BATTERY
21Ah
SPARK PLUG
-
STARTING
Kick
GEAR RATIO
-
PRIMARY DRIVE
-
ENGINE OIL
-

Chassis

FRAME
Central-tube frame with double-cradle
FRONT SUSPENSION
XACT 35 WP Upside-Down fork, Ø 35 mm
FRONT SUSPENSION STROKE
205 mm
FRONT BRAKE
160mm
REAR SUSPENSION
XACT WP mono shock
REAR SUSPENSION STROKE
185mm
REAR BRAKE
160mm
FRONT RIM TYPE
Spoked wheels with aluminium rims
REAR RIM TYPE
Spoked wheels with aluminium rims
REAR RIM DIMENSION
12''
FRONT TYRE
-
REAR TYRE
-
HEADLIGHT LAMP
-
TAILLIGHT LAMP
-

Dimensions

LENGTH
-
WIDTH
-
HEIGHT
-
GROUND CLEARANCE
233mm
UNLADEN WEIGHT
42.5kg
PERMITTED TOTAL WEIGHT
-
USABLE TANK VOLUME
-
RESERVE
-
WHEELBASE
-
SEAT HEIGHT
653MM

Sell your Bike.

Sell your bike quickly, simply, and safely.

Get an instant valuation, receive top offers from trusted dealers, and enjoy free home collection with same-day payment.

GB
4.7/5 Rating
Motorcycle

More bikes available form Wigan Yamaha

See all their bikes
See all their bikes
2016
New

Royal Enfield Continental GT 535

£4,999
HP from 259 p/m | 24 mo. | £299 deposit
2026
New

Sym Jet 14 Evo 125cc

£2,299
HP from 96 p/m | 24 mo. | £399 deposit
2026
New

Sym Symphony 125cc

£2,299
HP from 98 p/m | 24 mo. | £299 deposit
2026
New

Lambretta V200 Special

£3,799
HP from 5 p/m | 24 mo. | £299 deposit
2026
New

Suzuki Address UZ125

£2,099
HP from 75 p/m | 24 mo. | £299 deposit
2026
New

Mondial HPS 125 PAGANI SC

£2,999
HP from 121 p/m | 24 mo. | £499 deposit
2022
New

Benelli Leoncino 500 Trail

£3,499
HP from 146 p/m | 24 mo. | £299 deposit
2025
New

Mondial Flat Track 125cc

£2,999
HP from 121 p/m | 24 mo. | £499 deposit
2025
New

Royal Alloy GP 300

£4,399
HP from 182 p/m | 24 mo. | £499 deposit
2024
New

Benelli Leoncino 800 Trail

£5,699
HP from 246 p/m | 24 mo. | £499 deposit
See all their bikes

;