2027 KTM Motocross

FULL-SCREAM AHEAD

2027 KTM Motocross

MY27 KTM 125 SX - Image 1
MY27 KTM 125 SX - Image 2
MY27 KTM 125 SX - Image 3
MY27 KTM 125 SX - Image 4

MY27 KTM 125 SX

FULL-SCREAM AHEAD

RRP: £7,049.00
  • There are very few sounds that can't be beaten: the crack of a soda can on a blistering hot day, the ping of the perfectly executed golf shot, and the scream of a 125 cc 2-stroke full throttle. The KTM 125 SX takes its leads directly from the KTM Factory Racing team for pure performance, pure results. Like the sound it makes, you won't forget it.
Motocross

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Highly rated by our customers for service, expertise, and reliability.

Tech Specs

ENGINE TECHNICAL DATA


Engine

Engine Type

Single cylinder, 2-stroke

Displacement

124.8 ccm

Bore / Stroke

54 / 54.5 mm

Compression Ratio

Starter / Battery

Electric starter / Lithium Ion 12.8V 2Ah

Cooling

Liquid cooling

Fuel System

Keihin EFI, throttle body 39 mm

Ignition / Engine Management

Vitesco Technologies EMS

Control

Electronic Exhaust Control

Lubrication

Mixture oil lubrication 1:40


Transmission

Gears

6

Clutch

Wet multi-disc DS-clutch, Brembo hydraulics

Gear Ratios

GearRatio
1st14:32
2nd15:30
3rd17:28
4th19:27
5th19:23
6th22:24

Primary Ratio

23:73

Final Drive

13:50

Chain

520, Non-sealed


Chassis

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminium reinforced Polyamide

Handlebar

Neken, Aluminium Ø 28 / 22 mm

Steering Head Angle

63.9°

Triple Clamp Offset

22 mm

Silencer

Aluminium


Suspension

Front Suspension

WP XACT-USD (AER), Ø 48 mm

Rear Suspension

WP XACT Monoshock with linkage

Suspension Travel Front / Rear

310 / 300 mm


Wheels, Tyres & Brakes

Front / Rear Rims

1.60 × 21" / 2.15 × 19" — Excel

Front / Rear Tyres

80/100-21" / 100/90-19" — Dunlop MX34

Front / Rear Brakes

Disc brake Ø 260 / 220 mm — Brembo


Dimensions & Weight

Wheelbase

1,493 mm ± 10 mm

Ground Clearance

359 mm

Seat Height

958 mm

Tank Capacity (approx.)

7.2 L

Weight (without fuel)

92.0 kg

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What Our Customers Say

4.8 rating from our customers

About John Lee Motorcycles

John started work in the Motorcycle Trade in 1955, working for 2 large London Dealers for 10 years. His ambition was to own his own dealership, so moved to Northamptonshire and purchased the shop where we are today in Higham Ferrers, that was 1964.

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