TECHNICAL SPECIFICATIONS

KTM 50 SX 2025 (mundial)

2025–2025 50 SX (2025) WW

50 cc 2T

MotorDataBook

Key specifications

The essentials of this version at a glance.

60/100 - 12 36J TT
Front tyre size
✓
2,75 - 10 38J TT
Rear tyre size
✓
0.74 US qt
Coolant capacity
✓
14.5 psi
Front tyre pressure - normal load
✓
14.5 psi
Rear tyre pressure - normal load
✓
DOT 4/DOT 5.1
Brake fluid specification
✓
1.38 in
Drive chain slack minimum
✓
1.5 in
Drive chain slack maximum
✓
7 items

Brakes

Brake fluid specification
DOT 4/DOT 5.1 ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 133 Verification: Verified Open document
Front brake disc diameter
6.3 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Front brake disc minimum thickness
0.09 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Rear brake disc diameter
6.3 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Rear brake disc minimum thickness
0.09 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Front brake pad minimum thickness
0.04 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 80 Verification: Verified Open document
Rear brake pad minimum thickness
0.04 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 88 Verification: Verified Open document
4 items

Wheels and tyres

Front tyre size
60/100 - 12 36J TT ✓
El manual da el tamaño según la versión; se toma la fila «50 SX».
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Rear tyre size
2,75 - 10 38J TT ✓
El manual da el tamaño según la versión; se toma la fila «50 SX».
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Front tyre pressure - normal load Uso fuera de carretera (todoterreno)
14.5 psi ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Rear tyre pressure - normal load Uso fuera de carretera (todoterreno)
14.5 psi ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
5 items

Motorcycle Specific

Drive chain size
1/2 x 3/16” ✓
Paso y ancho interior de la cadena en pulgadas, tal como los da el manual.
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 128 Verification: Verified Open document
Drive chain slack minimum
1.38 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 70 Verification: Verified Open document
Drive chain slack maximum
1.5 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 70 Verification: Verified Open document
Front axle torque
29.5 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 131 Verification: Verified Open document
Rear axle torque
51.63 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 131 Verification: Verified Open document
1 items

Engine & Fluids

Coolant capacity
0.74 US qt ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 127 Verification: Verified Open document
4 items

Torque Specifications

Spark plug torque
9.59 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 125 Verification: Verified Open document
Front brake caliper torque
14.75 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 131 Verification: Verified Open document
Rear brake caliper torque
14.75 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 131 Verification: Verified Open document
Transmission drain plug torque
14.75 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: KTM Sportmotorcycle GmbH (buscador oficial de manuales) Document: 50 SX 2025 – Manual de instrucciones, mundial en español (25_3240036_es_OM) Reference: 125 Verification: Verified Open document

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MotorDataBook prioritises official documentation and shows conditions, notes and traceability whenever a figure needs context. Unconfirmed values should not be presented as facts.