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Year
2023
Year
2023
Parent Company
KTM
Parent Company
KTM
Generic Type (Primary)
Off-Road
Generic Type (Primary)
On-Off Road
Make
KTM
Make
KTM
Display Name
SX 125
Display Name
Adventure 390
Manufacturer Country
Austria
Manufacturer Country
Austria
Manufacturer Recommend Minimum Age
16
Manufacturer Recommend Minimum Age
16
Photo Gallery
Standard
Photo Gallery
Standard
Introduction Year
-
Introduction Year
2020
Price
Standard
Price
Standard
MSRP
$7,949
MSRP
$7,399
Destination Charge
535
Destination Charge
555
Warranty (Months/Condition)
1 / Limited
Warranty (Months/Condition)
24 / Limited
Basic Warranty (Miles/Kilometers)
-
Basic Warranty (Miles/Kilometers)
24000 / 38624
Engine
Standard
Engine
Standard
Engine Type
Single-Cylinder
Engine Type
Single-Cylinder
Cylinders
1
Cylinders
1
Engine Stroke
2-Stroke
Engine Stroke
4-Stroke
Cooling
Liquid
Cooling
Liquid
Valve Configuration
Reed Valve
Valve Configuration
DOHC
Starter
Electric
Starter
Electric
Fuel Type
Gas / Oil Premix
Fuel Type
Gas
Fuel Requirements
Premium
Fuel Requirements
Premium
Carburetion
Standard
Carburetion
Standard
Carburetion Brand
Keihin
Carburetion Brand
Bosch
Fuel Injector
Yes
Fuel Injector
Yes
Carburetor
No
Carburetor
No
Carburetion Type
Fuel Injected
Carburetion Type
Fuel Injected
Bore (mm/in)
54 / 2.13
Bore (mm/in)
89 / 3.5
Stroke (in/mm)
2.15 / 54.5
Stroke (in/mm)
2.36 / 60
Displacement (cc/ci)
124.8 / 7.6
Displacement (cc/ci)
373.2 / 22.8
Valves
-
Valves
4
Valves Per Cylinder
-
Valves Per Cylinder
4
Compression Ratio
-
Compression Ratio
12.6:1
Horsepower (bhp)
-
Horsepower (bhp)
44
Maximum Range (mi/km)
-
Maximum Range (mi/km)
248 / 400
Fuel Injector Size (mm)
-
Fuel Injector Size (mm)
46
Transmission
Standard
Transmission
Standard
Transmission Type
Manual
Transmission Type
Manual
Number Of Speeds
6
Number Of Speeds
6
Overdrive
No
Overdrive
-
Reverse
No
Reverse
No
Final Drive Ratio
3.85
Final Drive Ratio
-
Primary Drive (Rear Wheel)
Chain
Primary Drive (Rear Wheel)
Chain
Dimensions
Standard
Dimensions
Standard
Weight
Standard
Weight
Standard
Capacities
Standard
Capacities
Standard
Performance
Standard
Performance
Standard
Wheelbase (in/mm)
58.5 / 1485
Wheelbase (in/mm)
56.3 / 1430
Ground Clearance (in/mm)
14.1 / 359
Ground Clearance (in/mm)
-
Dry Weight (lbs/kg)
203.7 / 92.4
Dry Weight (lbs/kg)
355 / 161
Fuel Capacity (gal/l)
1.9 / 7.2
Fuel Capacity (gal/l)
3.8 / 14.5
Engine Displacement to Weight (cc)
0.61
Engine Displacement to Weight (cc)
-
Construction
Standard
Construction
Standard
Frame
Chromium Molybdenum
Frame
Steel
Body Material
Plastic
Body Material
Plastic
Foot Pegs
Standard
Foot Pegs
Standard
Foot Peg Location
Driver
Foot Peg Location
Driver and Passenger
Hand Grips
Standard
Hand Grips
Standard
Handlebars
Standard
Handlebars
Standard
Handlebar Pads
Standard
Handlebar Pads
-
Exterior Guards
Standard
Exterior Guards
Standard
Belt Guard
No
Belt Guard
No
Brush Guard
No
Brush Guard
No
Chassis Protectors
No
Chassis Protectors
-
Drive Shaft Guard
No
Drive Shaft Guard
No
Engine Case Guard
No
Engine Case Guard
Yes
Exhaust Guard
Yes
Exhaust Guard
Yes
Fork Guards
Yes
Fork Guards
Yes
Light Guard
No
Light Guard
No
Saddle Bag Guard
No
Saddle Bag Guard
No
Exterior Covers
Standard
Exterior Covers
Standard
Fuel Tank Cover
No
Fuel Tank Cover
Yes
Radiator Cover
Yes
Radiator Cover
-
Side Cover
No
Side Cover
-
Front Fender
Standard
Front Fender
Standard
Rear Fender
Standard
Rear Fender
Standard
Stand
Standard
Stand
Standard
Stand Type
Kick
Stand Type
Kick
Spoiler
Optional
Spoiler
-
Skid Plate
Optional
Skid Plate
Standard
Chain Guard
-
Chain Guard
Yes
Hand Guards
-
Hand Guards
Yes
Heel Guards
-
Heel Guards
No
Upper Fairing
-
Upper Fairing
Standard
Steering Control
Handlebar
Steering Control
Handlebar
Front Suspension Brand Name
WP XACT
Front Suspension Brand Name
WP APEX
Front Suspension Type
Inverted Fork
Front Suspension Type
Inverted Fork
Front Adjustable Fork Pre-Load
Yes
Front Adjustable Fork Pre-Load
-
Front Adjustable Rebound Damping
Yes
Front Adjustable Rebound Damping
Yes
Front Central Suspension Strut
No
Front Central Suspension Strut
No
Rear Suspension Brand Name
WP XACT
Rear Suspension Brand Name
WP APEX
Rear Suspension Type
Twin Sided Swing Arm
Rear Suspension Type
Twin Sided Swing Arm
Rear Suspension Material
Aluminum
Rear Suspension Material
Steel
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
Air Adjustable
No
Air Adjustable
No
Front Suspension Size (in/mm)
1.9 / 48
Front Suspension Size (in/mm)
1.7 / 43
Front Travel (in/mm)
12.2 / 310
Front Travel (in/mm)
6.7 / 170
Rear Travel (in/mm)
11.8 / 300
Rear Travel (in/mm)
7 / 177
Steering Damper
-
Steering Damper
No
Wheels
Standard
Wheels
Standard
Wheels Composition
Aluminum
Wheels Composition
Aluminum
Tube / Tubeless
Tubed
Tube / Tubeless
Tubeless
Tires
Standard
Tires
Standard
Tire Brand
Dunlop®
Tire Brand
Continental
Front Tire Width
80
Front Tire Width
100
Front Tire Aspect Ratio
100
Front Tire Aspect Ratio
90
Front Tire Speed Rating
M
Front Tire Speed Rating
T
Front Wheel Diameter
21
Front Wheel Diameter
19
Rear Tire Width
100
Rear Tire Width
130
Rear Tire Aspect Ratio
90
Rear Tire Aspect Ratio
80
Rear Tire Speed Rating
M
Rear Tire Speed Rating
T
Rear Wheel Diameter
19
Rear Wheel Diameter
17
Front Wheel Width (in)
1.6
Front Wheel Width (in)
2.5
Rear Wheel Width (in)
2.15
Rear Wheel Width (in)
3.5
Front Tire (Full Spec)
Dunlop® GEOMAX MX3S 80/100 R21 51M
Front Tire (Full Spec)
Continental TKC 70 100/90 R19 57T
Rear Tire (Full Spec)
Dunlop® GEOMAX MX3S 100/90 R19 57M
Rear Tire (Full Spec)
Continental TKC 70 130/80 R17 65T
Chromed
-
Chromed
No
Brakes
Standard
Brakes
Standard
Brake Brand Name
Brembo®
Brake Brand Name
ByBre
Front Brake Type
Hydraulic Disc
Front Brake Type
Hydraulic Disc
Rear Brake Type
Hydraulic Disc
Rear Brake Type
Hydraulic Disc
Front Brake Diameter (in/mm)
10.2 / 260
Front Brake Diameter (in/mm)
12.6 / 320
Rear Brake Diameter (in/mm)
8.7 / 220
Rear Brake Diameter (in/mm)
9.1 / 230
Anti-Lock Brakes
-
Anti-Lock Brakes
Standard
Linked Brake System Front to Rear
-
Linked Brake System Front to Rear
Standard
Seat Type
One-Piece
Seat Type
Two-Piece
Seat Location
Driver
Seat Location
Driver and Passenger
Seat Material
Vinyl
Seat Material
Vinyl
Adjustable
Yes
Adjustable
No
Folding
No
Folding
No
Seat Specifications
Standard
Seat Specifications
Standard
Number Of Seats
1
Number Of Seats
2
Seat Height (in/mm)
37.7 / 958
Seat Height (in/mm)
33.7 / 855
Backrest Logo Plate
-
Backrest Logo Plate
No
Grab Rail or Strap
-
Grab Rail or Strap
Standard
Digital Instrumentation
Optional
Digital Instrumentation
Standard
Tachometer
Optional
Tachometer
Standard
Lap Timer
Optional
Lap Timer
-
Clock
-
Clock
Standard
Speedometer
-
Speedometer
Standard
Trip Odometer
-
Trip Odometer
Standard
Trip Computer
-
Trip Computer
Standard
Fuel Level Warning
-
Fuel Level Warning
Standard
Fuel Level Warning Type
-
Fuel Level Warning Type
Gauge
Temperature Warning
-
Temperature Warning
Standard
Temperature Warning Type
-
Temperature Warning Type
Gauge
Shift Light
-
Shift Light
Standard
Shift Light Type
-
Shift Light Type
Adjustable
Service Reminder
-
Service Reminder
Standard
Storage Cover
Optional
Storage Cover
-
Underseat Storage
-
Underseat Storage
Standard
Rear Rack
-
Rear Rack
Standard
Adjustable Handlebars
Standard
Adjustable Handlebars
-
Engine Immobilizer
-
Engine Immobilizer
Standard
Paint
Standard
Paint
Standard
Metallic
No
Metallic
No
Decal Kit
Standard
Decal Kit
Standard
Type
-
Type
LED
Headlight (s)
-
Headlight (s)
Standard
Rearview Mirrors
-
Rearview Mirrors
Standard
Windshield
-
Windshield
Standard
Tinted
-
Tinted
Yes
Height
-
Height
Low
Height Adjustable
-
Height Adjustable
Yes
Windshield Lowers
-
Windshield Lowers
No
Windshield Mounts
-
Windshield Mounts
Standard