2012 KTM 125SX

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2012 KTM 125SX
2012 KTM 125SX

2012 KTM 125SX
2012 KTM 125SX

2012 KTM 125SX
2012 KTM 125SX

2012 KTM 125SX
2012 KTM 125SX

2012 KTM 125SX
2012 KTM 125SX

2012 KTM 125SX
2012 KTM 125SX


– 2012 KTM 125SX

2012 KTM 125SX Review

The contender

Those seeking the highest performance and most technologically advanced 125 need look no further than the 125 SX. The free-revving and lively two-stroke engine has gained even more performance for the current season. Not least due to the completely new frame and the new, progressive linkage rear suspension, there’s no way to avoid the 125 SX — whether making the transition from an 85cc machine or when planning the career of a future champion.

 

 

2012 KTM 125SX Features and Benefits

New for 2012:

» new frame
» new swing arm
» new rear shock
» new front fork (bushings, seals and setting)
» new intake boot (better performance)
» new kickstarter (-80 gr, better ergonomics)

 

New intake snorkel

The flow-optimized intake flange between airbox and carburetor on the 125 SX now ensures even better charging with fresh gas. This results in even freer revving and even more power in all RPM ranges for the liquid-cooled, two-stroke machine.

New exhaust expansion chamber

The new exhaust expansion chamber on the 125 SX has not only improved in quality; in conjunction with the two-stroke machine’s exhaust control system, its optimized resonance chamber ensures an extra shot of engine power — explosive, but dependable.

New frame

The completely revamped frame on the 125 SX is made from high-quality chrome-molybdenum steel and is extremely light and torsion-resistant. It is also characterized by a particularly balanced geometry that combines playful handling with razor-sharp precision.

New linkage rear suspension

The two-strokes in the MX range from KTM are now also equipped with the elaborate linkage rear suspension system. Linking the shock absorber via a lever system provides high progressiveness and wide adjustment ranges. The 125 SX therefore has a season ticket for the podium, even on the most brutal motocross tracks.

New swingarm

Apart from the new linkage rear suspension, there is the new cast aluminum swingarm, which is designed for minimum weight while supplying optimum lateral stiffness and defined longitudinal flexibility. This makes a major contribution to the excellent tracking stability of the 125 SX and its precise handling and extreme traction.

New swingarm

Apart from the new linkage rear suspension, there is the new cast aluminum swingarm, which is designed for minimum weight while supplying optimum lateral stiffness and defined longitudinal flexibility. This makes a major contribution to the excellent tracking stability of the 125 SX and its precise handling and extreme traction.

New telescopic fork setting

The further improved upside-down telescopic fork incorporating closed-cartridge technology now ensures even greater punch with a somewhat tauter setting. At the same time, the WP fork with 48 mm (1.89 in) outer tube diameter bolsters the lightweight handling of the 125 SX.

New intake snorkel

The flow-optimized intake flange between airbox and carburetor on the 125 SX now ensures even better charging with fresh gas. This results in even freer revving and even more power in all RPM ranges for the liquid-cooled, two-stroke machine.

New exhaust expansion chamber

The new exhaust expansion chamber on the 125 SX has not only improved in quality; in conjunction with the two-stroke machine’s exhaust control system, its optimized resonance chamber ensures an extra shot of engine power — explosive, but dependable.

New frame

The completely revamped frame on the 125 SX is made from high-quality chrome-molybdenum steel and is extremely light and torsion-resistant. It is also characterized by a particularly balanced geometry that combines playful handling with razor-sharp precision.

New linkage rear suspension

The two-strokes in the MX range from KTM are now also equipped with the elaborate linkage rear suspension system. Linking the shock absorber via a lever system provides high progressiveness and wide adjustment ranges. The 125 SX therefore has a season ticket for the podium, even on the most brutal motocross tracks.

New swingarm

Apart from the new linkage rear suspension, there is the new cast aluminum swingarm, which is designed for minimum weight while supplying optimum lateral stiffness and defined longitudinal flexibility. This makes a major contribution to the excellent tracking stability of the 125 SX and its precise handling and extreme traction.

New telescopic fork setting

The further improved upside-down telescopic fork incorporating closed-cartridge technology now ensures even greater punch with a somewhat tauter setting. At the same time, the WP fork with 48 mm (1.89 in) outer tube diameter bolsters the playful handling of the 125 SX.

Bodywork

The bodywork of the 125 SX with the very slim seat and radiator shrouds, plus excellent contact points perfect the bike’s ergonomics, making handling even simpler and more precise.

 



 

2012 KTM 125SX – International Specifications
MSRP Price: See KTM dealer in your country for pricing.

Engine
Engine type Single cylinder, 2-stroke
Displacement 124.8 cc
Bore/stroke 54/54.5 mm
Compression ratio –
Starter/battery Kickstarter
Transmission 6 gears
Carburetor Keihin PWK 38S AG
Control Exhaust control
Lubrication Mixture oil lubrication 1:40
Gear ratios 13:32 15:30 17:28 20:28 19:23 22:24
Primary ratio 23:73
Final drive 13:50
Cooling Liquid cooling
Clutch Wet multi-disc clutch, Magura hydraulics
Ignition Kokusan

Chassis
Frame Central double-cradle-type 25CrMo4
Subframe Aluminium
Handlebar Renthal, Aluminium Ø 28/22 mm
Front suspension WP-USD, Closed Cartridge, Ø 48 mm
Rear suspension WP-Monoshock with linkage
Suspension travel front/rear 300/330 mm
Front/rear brakes Disc brake 260/220 mm
Front/rear rims 1.60 x 21″; 2.15 x 19″ Excel
Front/rear tires 80/100-21″; 100/90-19″
Chain 5/8 x 1/4″
Silencer Aluminium
Steering head angle 63.5°
Wheel base 1,480 ± 10 mm
Ground clearance 395 mm
Seat height 992 mm
Tank capacity, approx. 7.5 l
Weight, without fuel, approx. 90.8 kg

About Michael Le Pard 671 Articles
For 18 years, Total Motorcycle has been supporting motorcyclists and motorcycling worldwide!

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