KTM 50 SX Specs

2013 - 2023 • 6 variants

The KTM 50 SX is a motorcycle produced from 2013 to 2023 across 6 variants. It is powered by a reed intake. displacing 49.0 cc. Peak torque is 9.2 Nm.

About the KTM 50 SX

The KTM 50 SX is a Cross / motocross motorcycle from KTM, produced from 2006 to 2023. This page provides a comprehensive technical reference for the KTM 50 SX, covering all available specification data including engine configuration, displacement, power output, dimensions, weight, and chassis details. Use the year selector above to find specifications for a specific model year. All data is sourced from manufacturer specifications and is intended as a technical reference for riders, mechanics, and enthusiasts.

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KTM 50 SX by Year

2023 KTM 50 SX View specs →

2021 KTM 50 SX View specs →

2018 KTM 50 SX View specs →

2017 KTM 50 SX View specs →

2014 KTM 50 SX View specs →

2013 KTM 50 SX View specs →

Spec Evolution

How key specs changed across production years.

Specification	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2021	2022	2023
Stroke	2	2	2	2	-	-	-	-	-	-	-	-	-	-	-	-	2-stroke
Seat Heigth -Alternate (mm)	-	-	685 mm	-	-	-	-	-	-	-	-	-	-	-	-	-
Seat Heigth -Alternate (in.)	-	-	27.0 inches	-	-	-	-	-	-	-	-	-	-	-	-	-
Ground Clearance (mm)	255 mm	255 mm	255 mm	255 mm	252 mm ↓	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm	252 mm
Ground Clearance (in.)	10.0 inches	10.0 inches	10.0 inches	10.0 inches	9.9 inches ↓	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches	9.9 inches
Fuel Control	-	-	-	-	-	Single Overhead Cams (SOHC)	Single Overhead Cams (SOHC)	Single Overhead Cams (SOHC)	-	-	-	-	-	-	Double Overhead Cams/Twin Cam (DOHC)	-
Brakes - Front Diameter (in.)	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	6.3 inches	-	-	-
Brakes - Front Diameter (mm)	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	160 mm	-	-	-
Engine Type	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke
Displacement (cc)	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.00 cc	49.0 cc	49.0 cc	49.0 cc	49.0 cc
Brakes - Rear Diameter (in.)	5.5 inches	5.5 inches	5.5 inches	5.5 inches	5.5 inches	5.5 inches	5.5 inches	5.5 inches	5.5 inches	5.5 inches	6.3 inches ↑	6.3 inches	6.3 inches	-	-	-
Comments	-	-	-	-	-	With reverse. German brand.	-	-	German brand.	For absolute beginners, the engine power can be restricted to a moderate 5.5 hp with a kit.	For absolute beginners, the engine power can be restricted to 5.5 hp with a kit.	The engine power can be restricted to 5.5 hp with a kit.	The engine power can be restricted to 5.5 hp with a kit.	The engine power can be restricted to 5.5 hp with a kit.	-	Intended for children 4-10 years old.	Intended for children 4-10 years old.
Brakes - Rear Diameter (mm)	140 mm	140 mm	140 mm	140 mm	140 mm	140 mm	140 mm	140 mm	140 mm	140 mm	160 mm ↑	160 mm	160 mm	-	-	-
Seat Height	650 mm / 25.6 in.	650 mm / 25.6 in.	660 mm / 26.0 in. ↑	684 mm / 26.9 in. ↑	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	684 mm / 26.9 in.	665 mm / 26.2 in. ↓	665 mm / 26.2 in.
Dry Weight	38.8 kg / 85.5 lbs	38.8 kg / 85.5 lbs	38.8 kg / 85.5 lbs	39.8 kg / 87.7 lbs ↑	39.8 kg / 87.7 lbs	39.8 kg / 87.7 lbs	41.5 kg / 91.5 lbs ↑	41.5 kg / 91.5 lbs	39.8 kg / 87.7 lbs ↓	39.8 kg / 87.7 lbs	41.5 kg / 91.5 lbs ↑	41.5 kg / 91.5 lbs	41.5 kg / 91.5 lbs	41.5 kg / 91.5 lbs	41.5 kg / 91.5 lbs	41.5 kg / 91.5 lbs	41.5 kg / 91.5 lbs
Frame Type	Central double-cradle-type frame	Central double-cradle-type frame	Double grinded central double-cradle-type frame	Double grinded central double-cradle-type frame. Steel subframe.	Double grinded central double-cradle-type frame	Double grinded central double-cradle-type frame. Subframe: Steel.	Central tube frame of chrome molybdenum steel tubing, powder-coated	Central tube frame of chrome molybdenum steel tubing, powder-coated	Central tube frame of chrome molybdenum steel tubing, powder-coated	Central tube frame of chrome molybdenum steel tubing, powder-coated	Central-tube frame with double-cradle	Central-tube frame with double-cradle	Central-tube frame with double-cradle	Central-tube frame with double-cradle	25CrMo4 steel central-tube frame	Central-tube frame with double-cradle	Central-tube frame with double-cradle
Engine Detail	-	-	-	-	-	-	Reed intake	Reed intake.	Reed intake.	Reed intake.	Reed intake.	Reed intake.	Reed intake	Reed intake	-	-
Brakes - Front	Single disc	Single disc	Single disc. Bremo	Single disc. Bremo	Single disc. Bremo	Single disc	Single disc. Four-pot brake caliper	Single disc. Four-piston calipers.	Single disc. Four-piston calipers.	Single disc. Four-piston calipers.	Single disc. Four-piston calipers.	Single disc. Four-piston calipers.	Single disc. Four-piston calipers.	Single disc. Four-piston calipers.	Single disc	Single disc	Single disc
Wheelbase	1,030 mm / 40.6 in.	1,030 mm / 40.6 in.	1,030 mm / 40.6 in.	1,030 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1,032 mm / 40.6 in.	1032 mm / 40.6 in. ↑	-	-	-
Fuel Capacity	1.80 litres / 0.48 gallons	1.80 litres / 0.48 gallons	1.80 litres / 0.48 gallons	2.30 litres / 0.61 gallons ↑	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 gallons	2.30 litres / 0.61 US gallons	2.30 litres / 0.61 US gallons	2.30 litres / 0.61 US gallons	2.30 litres / 0.61 US gallons
Brakes - Rear	Single disc	Single disc	Single disc. Bremo	Single disc. Bremo	Single disc. Bremo	Single disc	Single disc. Two-pot brake caliper	Single disc. Two-piston calipers.	Single disc. Two-piston calipers.	Single disc. Two-piston calipers.	Single disc. Two-piston calipers.	Single disc. Two-piston calipers.	Single disc. Two-piston calipers.	Single disc. Two-piston calipers.	Single disc	Single disc	Single disc
Suspension - Front	Marzocchi 32 mm (1.26 inches)	Marzocchi, 23 mm ↓	Marzocchi 32 mm (1.26 ↑	Marzocchi, 32 mm	Marzocchi 32 mm (1.26	Marzocchi 32 mm (1.26 in)	WP Suspension USD 35 ↑	WP ?Suspension USD ?35	WP ?Suspension USD ?35	WP ?Suspension USD ?35	WP upside-down ? 35 mm	WP upside-down ? 35 mm	WP upside-down ? 35 mm	WP upside-down Ø 35 mm	XACT 35 WP Upside-Down fork, Ø 35 mm	XACT 35 WP Upside-Down fork, Ø 35 mm	XACT 35 WP Upside-Down fork, Ø 35 mm
Suspension - Rear	WP monoshock	WP monoshock	WP monoshock	WP monoshock	WP mono shock	WP mono shock	WP Suspension 3614 BAEM	WP ?Suspension ?3614 BAEM	WP ?Suspension ?3614 BAEM	WP ?Suspension ?3614 BAEM	WP shock absorber	WP shock absorber	WP shock absorber	WP shock absorber	XACT WP mono shock	XACT WP mono shock	XACT WP PDS mono shock
Fuel System	Carburettor. Dell´Orto PHBG 19 BS	Carburettor. Dell´Orto PHBG 19 BS	Carburettor. Dell´Orto PHBG 19 BS	Carburettor. Dell´Orto PHBG 19 BS	Carburettor. Dell´Orto PHBG 19 BS	Carburettor. Dell´Orto PHBG 19 BS	Carburettor. Dell' Orto PHBG 19 BS ↓	Carburettor	Carburettor	Carburettor	Carburettor	Carburettor. Mikuni TMX	Carburettor. Mikuni TMX	Carburettor. Mikuni TMX	-	-	Carburettor
Colours	-	-	-	Orange/black	Orange	Orange, black, white	Orange, black, white	Orange/black	Orange/black	Orange/black	Orange/white/black	Orange/white/black	Orange/white/black	Orange/white/black	White/Orange	White/orange/black	White/orange/grey
Clutch	Centrifugal clutch (adjustable)	Centrifugal clutch, adjustable	Centrifugal clutch (adjustable)	Centrifugal clutch	Centrifugal clutch (adjustable)	Centrifugal clutch (adjustable)	3-lining automatic clutch on the main shaft / centrifugal force	3-lining automatic clutch on the main shaft / centrifugal force	3-lining automatic clutch on the main shaft / centrifugal force	3-lining automatic clutch on the main shaft / centrifugal force	Centrifugal clutch (adjustable)	Centrifugal clutch	Centrifugal clutch	Centrifugal clutch	Centrifugal	Centrifugal	Centrifugal
Final Drive	-	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain (final drive)	Chain (final drive)	Chain (final drive)	Chain (final drive)
Rims	-	-	-	-	-	1.5 x 12in., 1.6 x 10in. Alu	1.5 x 12in., 1.6 x 10in. Alu	-	-	-	Knobbly MAXXIS tires	Wire spoked	Wire spoked	Wire spoked	-	-
Height	-	-	-	-	-	-	-	1,140 mm / 44.9 in.	1,120 mm / 44.1 in. ↓	-	-	-	-	-	-	-	-
Length	-	-	-	-	-	1,400 mm / 55.1 in.	-	2,090 mm / 82.3 in.	2,120 mm / 83.5 in. ↑	-	-	-	-	-	-	-	-
Compression Ratio	-	-	12.5:1	12.5:1	12.5:1	-	11.0:1	10.6:1 ↓	-	-	-	-	-	-	-	-
Wet Weight	-	-	-	-	-	104.0 kg / 229.3 lbs	-	-	112.0 kg / 246.9 lbs	-	-	-	-	-	-	-	-
Emissions	-	-	-	-	-	Euro 2	-	-	Euro 2	-	-	-	-	-	-	-
Tyres - Front	-	-	2.50-12	60/100-12 ↑	60/100-12	19/7-8 ↓	21/7-10 ↑	100/80-17 ↑	110/70-17 ↑	-	-	-	-	-	-	-
Engine Lubrication	0,15- 0,2 l Motorex ATF Super	0,15 - 0,2 l Motorex ATF Super	Mixture lubrication 1:60 ↑	Mixture lubrication 1:60	Mixture oil lubrication 1:60	Mixture oil lubrication 1:60	Mixture oil lubrication 1:60	Mixture oil lubrication	Mixture oil lubrication	Mixture oil lubrication	Mixture oil lubrication	Mixture oil lubrication	Mixture oil lubrication	Mixture oil lubrication	-	-
Gearbox	-	-	Automatic	Automatic	Automatic	Automatic	Automatic	5-speed	6-speed ↑	1-speed ↓	1-speed	1-speed	1-speed	1-speed	Automatic	Automatic	Automatic
Width	-	-	-	-	-	960 mm / 37.8 in.	-	830 mm / 32.7 in.	840 mm / 33.1 in. ↑	-	-	-	-	-	-	-	-
Tyres - Rear	-	-	2.75-10	2.75-10	-	19/7-8	2.75-10 ↓	110/80-17 ↑	130/70-17 ↑	-	-	-	-	-	-	-
Primary Drive	-	-	-	-	-	11:40. Primary drive: 61:33.	11:40. Primary drive: 61:33. Rigid 1-stage reduction gear.	11:40. Primary drive: 33:61 straight cut spur gear.	11:40. Primary drive: 33:61 straight cut spur gear.	11:40. Primary drive: 33:61 straight cut spur gear.	11:40. Primary drive: 33:61 straight cut spur gear.	-	-	-	-	1/2 x 3/16´ chain	1/2 x 3/16´ chain
Rake	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°	24.0°
Exhaust	Aluminum	Aluminium	-	Aluminium	Aluminium	Aluminium	Aluminium	-	Stainless steel exhaust	-	-	-	-	-	-	-
Instrumentation	-	-	-	-	-	-	-	-	Digital cockpit	-	-	-	-	-	-	-
Wheel Travel - Front	-	115 mm / 4.5 in.	120 mm / 4.7 in. ↑	185 mm / 7.3 in. ↑	185 mm / 7.3 in.	185 mm / 7.3 in.	275 mm / 10.8 in. ↑	205 mm / 8.1 in. ↓	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.	205 mm / 8.1 in.
Wheel Travel - Rear	-	185 mm / 7.3 in.	125 mm / 4.9 in. ↓	185 mm / 7.3 in. ↑	185 mm / 7.3 in.	185 mm / 7.3 in.	272 mm / 10.7 in. ↑	185 mm / 7.3 in. ↓	185 mm / 7.3 in.	185 mm / 7.3 in.	185 mm / 7.3 in.	185 mm / 7.3 in.	185 mm / 7.3 in.	185 mm / 7.3 in.	180 mm / 7.1 in. ↓	180 mm / 7.1 in.	185 mm / 7.3 in. ↑
Ignition	Seletra analog	Seletra analogue	Seletra analogue	Seletra analogue	Seletra 2p D36	Seletra 2p D36	Seletra 2p D36	SELETTRA 2p D36	SELETTRA 2p D36	SELETTRA 2p D36	Seletra 2p D36	Seletra 2p D36	Seletra 2p D36	Seletra 2p D36	-	Seletra 2p D36 EMS	Seletra 2p D36 EMS
Max Torque	-	-	-	-	-	-	-	9.20 Nm (0.9 kgf-m or 6.8 ft.lbs) @ 7000 Revolutions	-	-	-	-	-	-	-	-
Power-to-Weight Ratio	-	-	-	-	-	-	-	0.0815 HP/kg	-	-	-	-	-	-	-	-
Valve System	-	1	-	-	-	-	4	2 ↓	-	-	-	-	-	-	-	-

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