2010 KTM 125SX

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2010 KTM 125SX

2010 KTM 125SX

2010 KTM 125SX

2010 KTM 125SX

2010 KTM 125SX

2010 KTM 125SX

– 2010 KTM 125SX

2010 KTM 125SX

Anyone looking for a winning bike in the MX2 class is hard pushed to pass by the 125 SX. And we mean that literally! An optimally balanced chassis sets the standard for the class. Ultra-light, super-agile and with two-stroke power that even four-stroke engines will find hard to replicate.

2010 KTM 125SX – Specifications
MSRP: See Dealer

Engine type Single cylinder, 2-stroke
Displacement 124.8 cc
Bore x stroke 54 x 54.5 mm (2.13 x 2.15″)
Starter Kickstarter
Transmission 6 gears
Carburetor Keihin PWK 38S AG
Control Exhaust control
Lubrication Mixture oil lubrication 1:40
Transmission oil Motorex, SAE 15W50
Primary drive 23:73
Final drive 13:50
Cooling Liquid cooling
Clutch Wet multi-disc clutch, operated hydraulically
Ignition Kokusan


Frame Central double-cradle-type 25CrMo4
Subframe Aluminium
Handlebar Renthal, Aluminium Ø 28/22 mm (1.10/0.87″)
Front suspension WP USD Ø 48 mm (1.89″)
Rear suspension WP PDS shock absorber
Suspension travel front/rear 300/335 mm (11.81/13.19″)
Brakes, front/rear Disc brakes 260/220 mm (10.24/8.66″)
Rims, front/rear 1.60 x 21″; 2.15 x 19″ Excel
Tires, front/rear 80/100-21″; 100/90-19″
Chain 5/8 x 1/4″
Main silencer Aluminium
Steering head angle 63.5°
Wheel base 1471±10 mm (57.91±0.39″)
Ground clearance (unloaded) 390 mm (15.35″)
Seat height 985 mm (38.78″)
Tank capacity approx. 8 liters (2.11 gal)
Weight (no fuel) approx. 90.8 kg (200.2 lbs)