2021 KTM 125 SX

Stock #125SX21
MSRP: $7,399
Check Availability

Hi, my name is and I'm interested in this 2021 KTM SX 125 . I'm in the area and you can reach me at or by phone at .

Available Color


  • Orange / White

KTM 125 SX 2021
 DOWNLOAD BROCHURE
The KTM 125 SX is the most compact and lightweight of the full-size bikes and delivers a confidence-inspiring ride like no other. A lightweight chassis teams up with the most competitive 125 cc 2-stroke engine in its class, delivering superior agility and power to fulfil the demands of any young adrenaline seeker. This 2-stroke screamer is the ultimate entry point into the pro ranks and a sure-fire way to add to the trophy collection.

ENGINE
The KTM 125 SX engine is undoubtedly once again the most competitive and powerful engine in its class. With an outstanding power-to-weight ratio, low cost and overall simplicity, it is clear that 2-strokes will continue to have a successful future at KTM. The compact and durable 17.2 kg engine was developed using the latest KTM engineering know-how, resulting in broad power across the rev range. Its easy rideability and outstanding performance are benefits that equate to faster lap times and better results.

FRAME
The frame and subframe on the KTM 125 SX caters for the aggressive riding styles associated with 125 cc racing. The frame itself is professionally crafted from hydroformed chromium molybdenum steel tubes that are robot welded, ensuring the highest levels of consistent quality. The stiffness has been precisely tailored for the most dynamic handling, and works in perfect harmony with the suspension to provide nimble agility without losing high-speed stability. The frame also features no dirt footpegs, which have a simple but effective self-cleaning system that ensures the footpegs return to their original psoition, providing complete control in all conditions. All SX frames feature the same highly durable powder coating as the KTM Factory machines and come with standard frame protectors. The subframe is made from lightweight aluminum, providing rear fender stability and strong support for the rider at little extra weight.

SEAT
All KTM SX models feature a seat that perfectly matches the range's dynamic performance-oriented ergonomics. The seat cover features silicone strips that provide better feel and grip for the rider. The seat is conveniently fixed to the bike using one long, lateral screw, making it easy to handle.

DECALS
The new modern graphics portray an impressively fast and aggressive look that sends a clear message to the competitors.

  • Status:
    New
  • Vehicle:
    2021 KTM 125 SX
  • Model Number:
    125 SX
  • Fuel Type:
    Gasoline
  • Engine:
    120cc, 2-Stroke, single cylinder Reed Valve, 0 valve, Single-Cylinder
  • Transmission:
    Manual
  • Stock Number:
    125SX21
  • Location:
    Nishna Valley Cycle, Atlantic, IA 50022
  • Warranty:
    Manufacturer's

ENGINE

  • Bore (in):
    2.13
  • Bore (mm):
    54
  • Carburetion Brand:
    Mikuni
  • Carburetion Type:
    Carburetor
  • Carburetor Size (mm):
    38
  • Carburetor:
    Yes
  • Cooling:
    Liquid
  • Cylinders:
    1
  • Displacement (cc):
    124.8
  • Displacement (ci):
    7.6
  • Engine Stroke:
    2-Stroke
  • Engine Type:
    Single-Cylinder
  • Fuel Requirements:
    Premium
  • Fuel Type:
    Gas / Oil Premix
  • Number Of Carburetors:
    1
  • Starter:
    Kick
  • Stroke (in):
    2.15
  • Stroke (mm):
    54.5
  • Valve Configuration:
    Reed Valve

BRAKES

  • Brake Brand Name:
    Brembo®
  • Front Brake Diameter (in):
    10.2
  • Front Brake Diameter (mm):
    260
  • Front Brake Type:
    Hydraulic Disc
  • Rear Brake Diameter (in):
    8.7
  • Rear Brake Diameter (mm):
    220
  • Rear Brake Type:
    Hydraulic Disc

TRANSMISSION

  • Final Drive Ratio:
    3.85
  • Gear Ratio (1):
    2.46
  • Gear Ratio (2):
    2
  • Gear Ratio (3):
    1.65
  • Gear Ratio (4):
    1.4
  • Gear Ratio (5):
    1.21
  • Gear Ratio (6):
    1.09
  • Number Of Speeds:
    6
  • Primary Drive (Rear Wheel):
    Chain
  • Transmission Type:
    Manual

EXTERIOR

  • Body Material:
    Plastic
  • Chain Guard:
    Yes
  • Exhaust Guard:
    Yes
  • Foot Peg Location:
    Driver
  • Fork Guards:
    Yes
  • Frame:
    Chromium Molybdenum
  • Radiator Cover:
    Yes
  • Stand Type:
    Kick

SEATS

  • Adjustable:
    Yes
  • Number Of Seats:
    1
  • Seat Height (in):
    33.5
  • Seat Height (mm):
    850
  • Seat Location:
    Driver
  • Seat Material:
    Vinyl
  • Seat Type:
    One-Piece

STEERING

  • Steering Control:
    Handlebar

SUSPENSION

  • Front Adjustable Fork Pre-Load:
    Yes
  • Front Adjustable Rebound Damping:
    Yes
  • Front Suspension Brand Name:
    WP XACT
  • Front Suspension Size (in):
    1.9
  • Front Suspension Size (mm):
    48
  • Front Suspension Type:
    Inverted Fork
  • Front Travel (in):
    12.2
  • Front Travel (mm):
    310
  • Number Rear Shock Absorbers:
    1
  • Rear Adjustable Rebound Damping:
    Yes
  • Rear Adjustable Shock / Spring Pre-Load:
    Yes
  • Rear Suspension Brand Name:
    WP XACT
  • Rear Suspension Material:
    Aluminum
  • Rear Suspension Type:
    Twin Sided Swing Arm
  • Rear Travel (in):
    11.8
  • Rear Travel (mm):
    300

TECHNICAL SPECIFICATIONS

  • Dry Weight (kg):
    87.5
  • Dry Weight (lbs):
    192.9
  • Engine Displacement to Weight (cc):
    0.65
  • Fuel Capacity (gal):
    2
  • Fuel Capacity (l):
    7.5
  • Ground Clearance (in):
    14.8
  • Ground Clearance (mm):
    375
  • Wheelbase (in):
    58.5
  • Wheelbase (mm):
    1485

WHEELS & TIRES

  • Front Tire (Full Spec):
    Dunlop® GEOMAX MX3S 80/100 R21 51M
  • Front Tire Aspect Ratio:
    100
  • Front Tire Speed Rating:
    M
  • Front Tire Width:
    80
  • Front Wheel Diameter:
    21
  • Front Wheel Width (in):
    1.6
  • Rear Tire (Full Spec):
    Dunlop® GEOMAX MX3S 100/90 R19 57M
  • Rear Tire Aspect Ratio:
    90
  • Rear Tire Speed Rating:
    M
  • Rear Tire Width:
    100
  • Rear Wheel Diameter:
    19
  • Rear Wheel Width (in):
    2.15
  • Tire Brand:
    Dunlop®
  • Tube / Tubeless:
    Tubed
  • Wheels Composition:
    Aluminum

Our Location


Nishna Valley Cycle
2500 E 7th St.
Atlantic, IA 50022