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2013 KTM 125SX Review
2013 KTM 125SX
How can you identify future champions? By the bike they ride. The KTM 125 SX has been the springboard to a professional career for many a hungry young rider. And this will continue to be the case, what with new bodywork and significantly revamped suspension. Driven by the powerful 2-stroke engine with exhaust control system and 6-speed transmission, the lightest bike in its class has long been at the top of the pile.
2013 KTM 125SX Features and Benefits
AIRBOX
The revised design of the airbox guarantees optimum protection of the filter from dirt and maximum air flow for top performance. New airbox covers are manufactured in a 2-component process with new in-mould graphics. The fixing for the left cover has been further improved, along with its installation. This makes quick replacement of the twin-air filter in a matter of seconds even easier. Needless to say, no tool is required – a feature that’s unique in the motocross world. Furthermore, an additional tab on the cover allows it to be secured with a bolt.
FRAME
The modern frame design of lightweight, high strength, chrome-molybdenum steel section tubes guarantees an ideal mix of longitudinal and torsional stiffness, resulting not only in easy handling and precise steering behaviour, but also in excellent ride stability. The engine braces to the cylinder head have also been optimised, along with their attachment to the frame. The frames bear a new colour for the 2013 model year and they are still the benchmark in terms of weight and stability.
SHOCK ABSORBER
The WP monoshock has been further refined for the KTM 125 SX 2013 and, together with the KTM linkage system, it excels with its completely revamped settings for improved damping, more traction and even higher reserves against bottoming out. As ever, rebound and compression damping (high and low speed) can be adapted individually to the track and rider in no time at all.
REVISED SWINGARM
The cast aluminium swingarm has been developed with state-of-the-art calculation and simulation software and constructed, in terms of design and wall thickness, for minimum weight with optimum stiffness and sufficient flex. For the 2013 model year, engineers have redesigned the rear section of the swingarm to allow installation of a thicker rear wheel axle (25 mm (0.98 in) instead of 20 m (66 ft)) for the benefit of better tracking stability. Moreover, they have succeeded in reducing weight by more than 100 g (3.53 oz) by revising the bolts, cups and nuts on the linkage.
IMPROVED FORK
The further improved 48 mm (1.89 in) upside-down fork featuring closed-cartridge technology has been optimised with completely revamped settings for perfect harmony with the new frame and engine. The new oil is significantly more wear-resistant and guarantees more consistent damping throughout both the course of a race and the bike’s life cycle. A new lower triple clamp is 80 grams lighter and, just like the upper triple clamp, CNC-machined from high quality aluminium, whereby the steering characteristics and hence the responsiveness of the fork have been noticeably improved.
BODYWORK
Not only visually does the completely revamped bodywork indicate that the 2013 model year represents a new SX generation. Above all, the ergonomics and function of the plastics have been designed in such a way that the whole chassis and engine package forms a perfect harmony with the rider down to the very last detail. The fuel tank and spoiler have been restyled along with the airbox cover and the front fender, including the start number plate. A particular highlight is the new front fender, which has no ribbing whatsoever on the inside, thereby preventing mud build-up. A pioneering structure and improved attachment of the fender to the triple clamp result in up to 50% greater lateral stiffness.
2013 KTM 125SX – USA Specifications/Technical Details
US MSRP Price: See dealer for pricing in USD
ENGINE
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake and exhaust control
Displacement 124.8 cm³ (7.616 cu in)
Bore 54 mm (2.13 in)
Stroke 54.5 mm (2.146 in)
Starting aid
Gearbox 6-gear, claw shifted
Primary transmission 23:73
Secondary ratio 13:50
Clutch Multidisc clutch in oil bath/hydraulically activated
Ignition Contactless controlled fully electronic ignition with digital ignition adjustment, type Kokusan
CHASSIS
Frame Central tube frame made of chrome molybdenum steel tubing
Fork WP Suspension Up Side Down 4860 MXMA CC
Shock absorber WP Suspension 5018 BAVP DCC
Suspension travel Front 300 mm (11.81 in)
Suspension travel Rear 330 mm (12.99 in)
Brake system Disc brakes, brake calipers on floating bearings
Brake discs – diameter Front 260 mm (10.24 in)
Brake discs – diameter Rear 220 mm (8.66 in)
Chain 5/8 x 1/4″
Steering head angle 63.5°
Wheelbase 1,480±10 mm (58.27±0.39 in)
Ground clearance unloaded 395 mm (15.55 in)
Seat height unloaded 992 mm (39.06 in)
Total fuel tank capacity, approx. 7.5 l (1.98 US gal)
Super unleaded gasoline, mixed with 2-stroke engine oil (1:40)
Weight without fuel, approx. 90.8 kg (200.2 lb.)
2013 KTM 125SX – Canadian Specifications/Technical Details
Canada MSRP Price: See dealer for pricing in CDN
ENGINE
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake and exhaust control
Displacement 124.8 cm³ (7.616 cu in)
Bore 54 mm (2.13 in)
Stroke 54.5 mm (2.146 in)
Starting aid
Gearbox 6-gear, claw shifted
Primary transmission 23:73
Secondary ratio 13:50
Clutch Multidisc clutch in oil bath/hydraulically activated
Ignition Contactless controlled fully electronic ignition with digital ignition adjustment, type Kokusan
CHASSIS
Frame Central tube frame made of chrome molybdenum steel tubing
Fork WP Suspension Up Side Down 4860 MXMA CC
Shock absorber WP Suspension 5018 BAVP DCC
Suspension travel Front 300 mm (11.81 in)
Suspension travel Rear 330 mm (12.99 in)
Brake system Disc brakes, brake calipers on floating bearings
Brake discs – diameter Front 260 mm (10.24 in)
Brake discs – diameter Rear 220 mm (8.66 in)
Chain 5/8 x 1/4″
Steering head angle 63.5°
Wheelbase 1,480±10 mm (58.27±0.39 in)
Ground clearance unloaded 395 mm (15.55 in)
Seat height unloaded 992 mm (39.06 in)
Total fuel tank capacity, approx. 7.5 l (1.98 US gal)
Super unleaded gasoline, mixed with 2-stroke engine oil (1:40)
Weight without fuel, approx. 90.8 kg (200.2 lb.)
Prices and specifications subject to change without notice.
2013 KTM 125SX – UK/Europe Specifications/Technical Details
UK/European MSRP Price: £5,345.00 GBP.
ENGINE
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake and exhaust control
Displacement 124.8 cm³
Bore 54 mm
Stroke 54.5 mm
Starting aid
Transmission 6 gear, claw shifted
Primary gear 23:73
Final drive 13:50
Clutch Wet multi-disc clutch / hydraulically operated
Ignition system Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
CHASSIS
Frame Central tube frame made of chrome molybdenum steel tubing
Forks WP Suspension Up Side Down 4860 MXMA CC
Shock absorber WP Suspension 5018 BAVP DCC
Suspension travel Front 300 mm
Suspension travel Rear 330 mm
Brake system Disc brakes, brake calipers on floating bearings
Brake discs – diameter Front 260 mm
Brake discs – diameter Rear 220 mm
Chain 5/8 x 1/4″
Steering head angle 63.5°
Wheel base 1,480±10 mm
Ground clearance (unloaded) 395 mm
Seat height (unloaded) 992 mm
Total fuel tank capacity approx. 7.5 l
Unleaded premium fuel, mixed with 2-stroke engine oil (1:40)
Weight without fuel approx. 90.8 kg
Prices and specifications subject to change without notice.
2013 KTM 125SX – Australian Specifications/Technical Details
AU MSRP Price: See dealer for Pricing in AUD
Engine
Engine Type1-cylinder 2-stroke engine, water cooled, with reed intake and exhaust control
Displacement124.8cm³
Bore / Stroke54/54.5mm
Starter / BatteryKickstarter
Transmission6 gear, claw shifted
Fuel ManagementKeihin PWK 38 S AG
ControlExhaust Control
LubricationMixture oil lubrication
Primary Ratio23:73
Final Drive13:50
CoolingLiquid cooling system
ClutchWet multi-disc clutch / hydraulically operated
IgnitionKokusan
Chassis
FrameCentral tube frame of chrome molybdenum steel tubing
Sub-Frame aluminium
HandlebarRenthal aluminium
Front SuspensionWP Suspension USD 4860 MXMA CC
Rear SuspensionWP Suspension 5018 BAVP DCC
Suspension Travel – Front / Rear300/330mm
Front / Rear BrakesDisc brake 260mm front / 220mm rear
Front / Rear Rims1.60 x 21″ / 2.15 x 19″ Excel
Front / Rear Tyres80/100-21″ / 100/90-19″
Chain5/8 x 1/4″
Silenceraluminium
Steering Head Angle63.5º
Wheel Base1480 ± 10mm
Ground Clearance395mm
Seat Height992mm
Tank Capacity approx.7.5l
Weight Without Fuel approx.90.8kg
Specifications, features and prices to change by manufacturer without notice. All information correct as of posted date.
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