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Model Type
Youth
Model Type
Off-Road
MSRP
$3,999
MSRP
$6,899
Warranty
1
Warranty
1
Insurance
Insurance
Finance
Finance
Generic Type (Primary)
Youth
Generic Type (Primary)
Off-Road
Manufacturer Country
Austria
Manufacturer Country
Austria
Manufacturer Recommend Minimum Age
6
Manufacturer Recommend Minimum Age
16
Parent Company
KTM
Parent Company
KTM
Display Name
SX 50
Display Name
SX 125
Photo Gallery
Standard
Photo Gallery
Standard
Year
2017
Year
2017
Make
KTM
Make
KTM
Engine Type
Single-Cylinder
Engine Type
Single-Cylinder
Cylinders
1
Cylinders
1
Engine Stroke
2-Stroke
Engine Stroke
2-Stroke
Cooling
Liquid
Cooling
Liquid
Valve Configuration
Reed Valve
Valve Configuration
Reed Valve
Bore (mm/in)
39.5 / 1.56
Bore (mm/in)
54 / 2.13
Stroke (mm/in)
40 / 1.57
Stroke (mm/in)
54.5 / 2.15
Displacement (cc/ci)
49 / 3
Displacement (cc/ci)
124.8 / 7.6
Starter
Kick
Starter
Kick
Fuel Requirements
Premium
Fuel Requirements
Premium
Fuel Type
Gas / Oil Premix
Fuel Type
Gas / Oil Premix
Turbocharged
No
Turbocharged
No
Supercharged
No
Supercharged
No
Carburetion Brand
Dell'Orto
Carburetion Brand
Mikuni
Fuel Injector
No
Fuel Injector
No
Carburetor
Yes
Carburetor
Yes
Number Of Carburetors
1
Number Of Carburetors
1
Carburetor Size (mm)
19
Carburetor Size (mm)
38
Carburetion Type
Carburetor
Carburetion Type
Carburetor
Parental Controls
Standard
Parental Controls
-
Transmission Type
Automatic
Transmission Type
Manual
Number Of Speeds
1
Number Of Speeds
6
Primary Drive (Rear Wheel)
Chain
Primary Drive (Rear Wheel)
Chain
Primary Drive (Engine / Transmission)
Gear
Primary Drive (Engine / Transmission)
-
Reverse
No
Reverse
No
Final Drive Ratio
3.64
Final Drive Ratio
3.85
Overdrive
-
Overdrive
No
Gear Ratio (1/2/3/4/5/6)
-
Gear Ratio (1/2/3/4/5/6)
2.46 / 2 / 1.65 / 1.4 / 1.21 / 1.09
Wheels Composition
Aluminum
Wheels Composition
Aluminum
Tube / Tubeless
Tubed
Tube / Tubeless
Tubed
Front Wheel Width (in)
2.5
Front Wheel Width (in)
1.6
Rear Wheel Width (in)
2.75
Rear Wheel Width (in)
2.15
Tire Brand
Maxxis(R)
Tire Brand
Dunlop(R)
Front Tire Speed Rating
J
Front Tire Speed Rating
M
Front Wheel Diameter
12
Front Wheel Diameter
21
Rear Tire Speed Rating
J
Rear Tire Speed Rating
M
Rear Wheel Diameter
10
Rear Wheel Diameter
19
Front Tire (Full Spec)
Maxxis(R) Maxx Cross SI 2.50 X 12 42J
Front Tire (Full Spec)
Dunlop(R) GEOMAX MX3S 80/100 R21 51M
Rear Tire (Full Spec)
Maxxis(R) Maxx Cross SI 2.75 X 10 38J
Rear Tire (Full Spec)
Dunlop(R) GEOMAX MX3S 100/90 R19 57M
Front Tire Width
-
Front Tire Width
80
Front Tire Aspect Ratio
-
Front Tire Aspect Ratio
100
Rear Tire Width
-
Rear Tire Width
100
Rear Tire Aspect Ratio
-
Rear Tire Aspect Ratio
90
Brake Brand Name
Formula
Brake Brand Name
Brembo(R)
Front Brake Type
Hydraulic Disc
Front Brake Type
Hydraulic Disc
Front Brake Diameter (in/mm)
6.3 / 160
Front Brake Diameter (in/mm)
10.2 / 260
Rear Brake Type
Hydraulic Disc
Rear Brake Type
Hydraulic Disc
Rear Brake Diameter (in/mm)
6.3 / 160
Rear Brake Diameter (in/mm)
8.7 / 220
Front Suspension Type
Inverted Fork
Front Suspension Type
Inverted Fork
Front Suspension Size (in/mm)
1.3 / 35
Front Suspension Size (in/mm)
1.9 / 48
Front Travel (in/mm)
8.1 / 205
Front Travel (in/mm)
12.2 / 310
Front Adjustable Fork Pre-Load
Yes
Front Adjustable Fork Pre-Load
Yes
Front Adjustable Rebound Damping
Yes
Front Adjustable Rebound Damping
Yes
Front Central Suspension Strut
No
Front Central Suspension Strut
No
Front Suspension Brand Name
WP AER
Front Suspension Brand Name
WP AER
Steering Damper
No
Steering Damper
-
Rear Suspension Type
Twin Sided Swing Arm
Rear Suspension Type
Twin Sided Swing Arm
Rear Travel (in/mm)
7.3 / 185
Rear Travel (in/mm)
11.8 / 300
Rear Adjustable Shock / Spring Pre-Load
Yes
Rear Adjustable Shock / Spring Pre-Load
Yes
Rear Adjustable Rebound Damping
Yes
Rear Adjustable Rebound Damping
Yes
Number Rear Shock Absorbers
1
Number Rear Shock Absorbers
1
Rear Suspension Brand Name
WP
Rear Suspension Brand Name
WP
Rear Suspension Material
Aluminum
Rear Suspension Material
Aluminum
Air Adjustable
No
Air Adjustable
No
Steering Control
Handlebar
Steering Control
Handlebar
Wheelbase (in/mm)
40.6 / 1032
Wheelbase (in/mm)
58.5 / 1485
Ground Clearance (in/mm)
9.9 / 252
Ground Clearance (in/mm)
14.8 / 375
Dry Weight (lbs/kg)
91.5 / 41.5
Dry Weight (lbs/kg)
192.2 / 87.2
Fuel Capacity (gal/l)
0.6 / 2.3
Fuel Capacity (gal/l)
1.8 / 7
Engine Displacement to Weight (cc)
0.54
Engine Displacement to Weight (cc)
0.65
Seat Type
One-Piece
Seat Type
One-Piece
Adjustable
Yes
Adjustable
Yes
Seat Material
Vinyl
Seat Material
Vinyl
Seat Location
Driver
Seat Location
Driver
Folding
No
Folding
No
Seat Height (in/mm)
26.9 / 684
Seat Height (in/mm)
37.8 / 960
Number Of Seats
1
Number Of Seats
1
Frame
Chromium Molybdenum
Frame
Chromium Molybdenum
Body Material
Plastic
Body Material
Plastic
Hand Grips
Standard
Hand Grips
Standard
Foot Peg Location
Driver
Foot Peg Location
Driver
Chain Guard
Yes
Chain Guard
Yes
Chassis Protectors
No
Chassis Protectors
No
Drive Shaft Guard
No
Drive Shaft Guard
No
Engine Case Guard
No
Engine Case Guard
No
Fork Guards
Yes
Fork Guards
Yes
Saddle Bag Guard
No
Saddle Bag Guard
No
Belt Guard
No
Belt Guard
No
Hand Guards
No
Hand Guards
-
Brush Guard
No
Brush Guard
No
Exhaust Guard
Yes
Exhaust Guard
Yes
Light Guard
No
Light Guard
No
Side Cover
No
Side Cover
No
Fuel Tank Cover
No
Fuel Tank Cover
No
Front Fender
Standard
Front Fender
Standard
Rear Fender
Standard
Rear Fender
Standard
Top Crown
Standard
Top Crown
-
Stand Type
Kick
Stand Type
Kick
Handlebars
Standard
Handlebars
Standard
Handlebar Pads
Standard
Handlebar Pads
Standard
Top Crown Material
-
Top Crown Material
Aluminum
Warranty (Months/Condition)
1 / Limited
Warranty (Months/Condition)
1 / Limited
Battery Warranty (Months)
0
Battery Warranty (Months)
0
Metallic
No
Metallic
No
Decal Kit
Standard
Decal Kit
Standard
Adjustable Handlebars
-
Adjustable Handlebars
Standard
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