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Select motorcycles to compare their specifications
Model Type
Youth
Model Type
Sport
MSRP
$0
MSRP
$0
Warranty
1
Warranty
24
Insurance
Insurance
Finance
Finance
Generic Type (Primary)
Youth
Generic Type (Primary)
Sport
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
RC 390
Photo Gallery
Standard
Photo Gallery
-
Year
2018
Year
2018
Make
KTM
Make
KTM
Introduction Year
-
Introduction Year
2015
Representative Image
-
Representative Image
No
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
Bore (mm/in)
39.5 / 1.56
Bore (mm/in)
89 / 3.5
Stroke (mm/in)
40 / 1.57
Stroke (mm/in)
60 / 2.36
Displacement (cc/ci)
49 / 3
Displacement (cc/ci)
373.2 / 22.8
Starter
Kick
Starter
Electric
Fuel Requirements
Premium
Fuel Requirements
Premium
Fuel Type
Gas / Oil Premix
Fuel Type
Gas
Turbocharged
No
Turbocharged
No
Supercharged
No
Supercharged
No
Carburetion Brand
Dell'Orto
Carburetion Brand
Bosch
Fuel Injector
No
Fuel Injector
Yes
Carburetor
Yes
Carburetor
No
Number Of Carburetors
1
Number Of Carburetors
-
Carburetor Size (mm)
19
Carburetor Size (mm)
-
Carburetion Type
Carburetor
Carburetion Type
Fuel Injected
Parental Controls
Standard
Parental Controls
-
Horsepower (bhp/kW)
-
Horsepower (bhp/kW)
44 / 32
Valves
-
Valves
4
Valves Per Cylinder
-
Valves Per Cylinder
4
Compression Ratio
-
Compression Ratio
12.6:1
Fuel Injector Size (mm)
-
Fuel Injector Size (mm)
46
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
Yes
Final Drive Ratio
3.64
Final Drive Ratio
2.67
Overdrive
-
Overdrive
Yes
Gear Ratio (1/2/3/4/5/6)
-
Gear Ratio (1/2/3/4/5/6)
2.67 / 1.86 / 1.42 / 1.14 / 0.96 / 0.84
Wheels Composition
Aluminum
Wheels Composition
Aluminum
Tube / Tubeless
Tubed
Tube / Tubeless
Tubeless
Front Wheel Width (in)
2.5
Front Wheel Width (in)
-
Rear Wheel Width (in)
2.75
Rear Wheel Width (in)
-
Tire Brand
Maxxis(R)
Tire Brand
Metzeler
Front Tire Speed Rating
J
Front Tire Speed Rating
54W
Front Wheel Diameter
12
Front Wheel Diameter
17
Rear Tire Speed Rating
J
Rear Tire Speed Rating
66W
Rear Wheel Diameter
10
Rear Wheel Diameter
17
Front Tire (Full Spec)
Maxxis(R) Maxx Cross SI 2.50 X 12 42J
Front Tire (Full Spec)
Metzeler 110/70 ZR17 54W
Rear Tire (Full Spec)
Maxxis(R) Maxx Cross SI 2.75 X 10 38J
Rear Tire (Full Spec)
Metzeler 150/60 ZR17 66W
Chromed
-
Chromed
No
Front Tire Width
-
Front Tire Width
110
Front Tire Aspect Ratio
-
Front Tire Aspect Ratio
70
Rear Tire Width
-
Rear Tire Width
150
Rear Tire Aspect Ratio
-
Rear Tire Aspect Ratio
60
Brake Brand Name
Formula
Brake Brand Name
Brembo(R)
Front Brake Type
Hydraulic Disc
Front Brake Type
Disc
Front Brake Diameter (in/mm)
6.3 / 160
Front Brake Diameter (in/mm)
12.6 / 320
Rear Brake Type
Hydraulic Disc
Rear Brake Type
Disc
Rear Brake Diameter (in/mm)
6.3 / 160
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
Front Suspension Type
Inverted Fork
Front Suspension Type
Inverted Fork
Front Suspension Size (in/mm)
1.3 / 35
Front Suspension Size (in/mm)
1.7 / 43
Front Travel (in/mm)
8.1 / 205
Front Travel (in/mm)
4.9 / 125
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
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)
5.9 / 150
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)
52.8 / 1340
Ground Clearance (in/mm)
9.9 / 252
Ground Clearance (in/mm)
7 / 178.5
Dry Weight (lbs/kg)
91.5 / 41.5
Dry Weight (lbs/kg)
324.1 / 149
Fuel Capacity (gal/l)
0.6 / 2.3
Fuel Capacity (gal/l)
2.6 / 10
Engine Displacement to Weight (cc)
0.54
Engine Displacement to Weight (cc)
1.15
Fuel Capacity Reserve (gal/l)
-
Fuel Capacity Reserve (gal/l)
0.4 / 1.5
Seat Type
One-Piece
Seat Type
Two-Piece
Adjustable
Yes
Adjustable
No
Seat Material
Vinyl
Seat Material
Vinyl
Seat Location
Driver
Seat Location
Driver and Passenger
Folding
No
Folding
-
Seat Height (in/mm)
26.9 / 684
Seat Height (in/mm)
32.3 / 820
Number Of Seats
1
Number Of Seats
2
Backrest Logo Plate
-
Backrest Logo Plate
No
Frame
Chromium Molybdenum
Frame
Steel
Body Material
Plastic
Body Material
Plastic
Hand Grips
Standard
Hand Grips
Standard
Foot Peg Location
Driver
Foot Peg Location
Driver and Passenger
Chain Guard
Yes
Chain Guard
Yes
Chassis Protectors
No
Chassis Protectors
-
Drive Shaft Guard
No
Drive Shaft Guard
No
Engine Case Guard
No
Engine Case Guard
-
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
No
Brush Guard
No
Brush Guard
No
Exhaust Guard
Yes
Exhaust Guard
Yes
Light Guard
No
Light Guard
No
Side Cover
No
Side Cover
-
Fuel Tank Cover
No
Fuel Tank Cover
Yes
Front Fender
Standard
Front Fender
Standard
Rear Fender
Standard
Rear Fender
Standard
Top Crown
Standard
Top Crown
Standard
Stand Type
Kick
Stand Type
Kick
Handlebars
Standard
Handlebars
Standard
Handlebar Pads
Standard
Handlebar Pads
-
Heel Guards
-
Heel Guards
No
Lower Fairing
-
Lower Fairing
Standard
Spoiler
-
Spoiler
Standard
Upper Fairing
-
Upper Fairing
Standard
License Plate
-
License Plate
Standard
Warranty (Months/Condition)
1 / Limited
Warranty (Months/Condition)
24 / Limited
Battery Warranty (Months)
0
Battery Warranty (Months)
0
Basic Warranty (Miles/Kilometers)
-
Basic Warranty (Miles/Kilometers)
24000 / 38624
Metallic
No
Metallic
No
Decal Kit
Standard
Decal Kit
Standard
Digital Instrumentation
-
Digital Instrumentation
Standard
Clock
-
Clock
Standard
Tachometer
-
Tachometer
Standard
Trip Odometer
-
Trip Odometer
Standard
Trip Computer
-
Trip Computer
Standard
Shift Light
-
Shift Light
Standard
Speedometer
-
Speedometer
Standard
Temperature Warning Type
-
Temperature Warning Type
Gauge
Fuel Level Warning Type
-
Fuel Level Warning Type
Gauge
Service Reminder
-
Service Reminder
Standard
Tool Bag Mount
-
Tool Bag Mount
Standard
Windshield Mounts
-
Windshield Mounts
Standard
Folding
-
Folding
Yes
Windshield Lowers
-
Windshield Lowers
No
Height Adjustable
-
Height Adjustable
No
Tinted
-
Tinted
Yes
Height
-
Height
Low
Underseat Storage
-
Underseat Storage
Standard
Headlight Mounts
-
Headlight Mounts
Standard
Halogen Headlight (s)
-
Halogen Headlight (s)
Standard
Headlight (s)
-
Headlight (s)
Standard
Light Type
-
Light Type
Halogen
Engine Immobilizer
-
Engine Immobilizer
Standard
Adjustable Levers
-
Adjustable Levers
Standard
Handlebar Lock
-
Handlebar Lock
Standard
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