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2013 KTM 350SX-F Review
2013 KTM 350SX-F
For 2 years now, the KTM 350 SX-F has been demonstrating that races are not decided by displacement. This unique bike supplies the power and performance of a 450 combined with the handling of a 250. Now the MX1 championship bike is entering MY 2013 with a revamped engine, an improved chassis and new bodywork.
2013 KTM 350SX-F Features and Benefits
REVAMPED ENGINE
The advantage of the KTM 350 SX-F has always been its weight. And now the bike’s heart is even lighter. Another 500 g (17.64 oz) and more have been lost thanks to the new die-cast housing. The extremely short-stroked DOHC power unit, equipped with the latest generation of EFI, excels with its even wider rev range and exceedingly efficient rideability. And, just like all KTM four-strokes, it can be activated with an electric-starter.
CYLINDER HEAD
The modifications to the 350 cm³ (21.36 cu in) DOHC engine can be summarized very easily: more power at less weight. Flow-optimized ducts supply greater gas flow and better cylinder charging. Strengthened valve heads and valve seats plus valve springs with a higher spring force make it possible for the lightweight titanium valves to withstand the increase in maximum engine speed from 13,000 rpm to 13,400 rpm. Or more simply said: more power for the new 2013 KTM 350 SX-F.
CRANKSHAFT
Factory bike or production bike? You’ll find no difference in the crankshaft. Just like last season’s KTM factory machines, the crankshaft on the new 2013 KTM 350 SX-F is equipped with a revolutionary plain bearing in the lower conrod eye. In conjunction with the stiffened crankshaft and a lighter piston, this design is a key prerequisite for increasing the maximum engine speed to 13,400 rpm and the impressive peak performance of the 350 cm³ (21.36 cu in) engine. But not everything revolves around pure power. One major benefit is an extension to the service intervals for the crankshaft; a benefit in terms of time and costs.
FRAME
The modern frame design of lightweight, high=strength, chromoly steel section tubes guarantees an ideal mix of longitudinal and torsional stiffness, resulting not only in easy handling and precise steering behavior, but also in excellent ride stability. The four-stroke frames impress in MY 2013 with a stiffening of the frame triangle and thinner-walled down tubes. This leads to an improvement in tracking stability (increased torsional stiffness) accompanied by a reduction in weight. The engine braces to the cylinder head have also been optimized, along with their attachment to the frame. The frame bears a new color on the 2013 KTM 350 SX-F and it is still the benchmark in terms of weight and stability.
TELESCOPIC FORK
The further improved 48 mm (1.89 in) upside-down fork featuring closed-cartridge technology has been optimized with completely revamped settings made specifically for the United States MX market 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 g (2.82 oz) lighter and, just like the upper triple clamp, CNC-machined from high-quality aluminum, whereby the steering characteristics, and hence, the responsiveness of the fork have been noticeably improved.
SWINGARM
The cast aluminum 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 KTM 350 SX-F, engineers have redesigned the rear section of the swingarm to allow installation of a larger rear wheel axle (25 mm (0.98 in) instead of 20 mm (0.79 in)) 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.
WHEELS
The wheels are fitted with lightweight, CNC-machined hubs and high-end EXCEL rims, plus new, black-coated spokes with aluminium nipples, guaranteeing the highest levels of stability while keeping weight to a minimum. The Dunlop GEOMAX MX51 tires stand for excellent traction and performance. For the benefit of greater ride stability on the KTM 2013 350 SX-F, the rear axle has been increased in diameter from 20 mm (0.79 in) to 25 mm (0.98 in).
BRAKES
Brakes from Brembo® are standard equipment on KTM motocross bikes and, together with lightweight Galpher wave-type brake discs, they are recognized as the measure of all things in terms of application and brake performance. At the rear wheel, the brake caliper carriers have been adapted to the larger axle diameter for MY 2013.
2013 KTM 350SX-F – USA Specifications/Technical Details
US MSRP Price: See dealer for pricing in USD
ENGINE
Design 1-cylinder 4-stroke engine, water-cooled
Displacement 349.7 cm³ (21.34 cu in)
Bore 88 mm (3.46 in)
Stroke 57.5 mm (2.264 in)
Starting aid E-Starter
Gearbox 5-gear, claw shifted
Engine lubrication Pressure circulation lubrication with two Eaton pumps
Primary transmission 24:73
Secondary ratio 14:50
Cooling Water cooling, permanent circulation of coolant by water pump
Clutch Multidisc clutch in oil bath/hydraulically activated
Ignition Contactless controlled fully electronic ignition with digital ignition adjustment
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 317 mm (12.48 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 1,495±10 mm (58.86±0.39 in)
Ground clearance, unloaded 376 mm (14.8 in)
Seat height, unloaded 992 mm (39.06 in)
Total fuel tank capacity, approx. 75 l (19.8 US gal)
Super unleaded (ROZ 95/RON 95/PON 91)
Weight without fuel, approx. 104.8 kg (231 lb.)
2013 KTM 350SX-F – Canadian Specifications/Technical Details
Canada MSRP Price: See dealer for pricing in CDN
ENGINE
Design 1-cylinder 4-stroke engine, water-cooled
Displacement 349.7 cm³ (21.34 cu in)
Bore 88 mm (3.46 in)
Stroke 57.5 mm (2.264 in)
Starting aid E-Starter
Gearbox 5-gear, claw shifted
Engine lubrication Pressure circulation lubrication with two Eaton pumps
Primary transmission 24:73
Secondary ratio 14:50
Cooling Water cooling, permanent circulation of coolant by water pump
Clutch Multidisc clutch in oil bath/hydraulically activated
Ignition Contactless controlled fully electronic ignition with digital ignition adjustment
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 317 mm (12.48 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 1,495±10 mm (58.86±0.39 in)
Ground clearance, unloaded 376 mm (14.8 in)
Seat height, unloaded 992 mm (39.06 in)
Total fuel tank capacity, approx. 75 l (19.8 US gal)
Super unleaded (ROZ 95/RON 95/PON 91)
Weight without fuel, approx. 104.8 kg (231 lb.)
Prices and specifications subject to change without notice.
2013 KTM 350SX-F – UK/Europe Specifications/Technical Details
UK/European MSRP Price: £6,645.00 GBP.
ENGINE
Design Single-cylinder, 4-stroke, spark-ignition engine, liquid-cooled
Displacement 349.7 cm³
Bore 88 mm
Stroke 57.5 mm
Starting aid Electric starter
Transmission 5-speed, claw shifted
Engine lubrication Forced oil lubrication with 2 Eaton pumps
Primary gear ratio 24:73
Secondary gear ratio 14:50
Cooling system Liquid cooling system, continuous circulation of cooling liquid with water pump
Clutch Wet multi-disc clutch / hydraulically operated
Ignition system Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment
CHASSIS
Frame Central tubular frame made from chrome molybdenum steel tubes
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, floating brake calipers
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 1,495±10 mm
Ground clearance (unloaded) 376 mm
Seat height (unloaded) 992 mm
Total fuel tank capacity approx. 7.5 l
Unleaded premium fuel (95 RON)
Weight without fuel approx. 104.8 kg
Prices and specifications subject to change without notice.
2013 KTM 350SX-F – Australian Specifications/Technical Details
AU MSRP Price: See dealer for Pricing in AUD
Engine
Engine Type1-cylinder 4-stroke spark-ignition engine, liquid-cooled
Displacement349.7cm³
Bore / Stroke88/57.5mm
Compression Ratio13.65:1
Starter / BatteryElectric Start / 12V 3Ah
Transmission5 gear, claw shifted
Fuel ManagementKeihin EFI, throttle body 44mm
Control4 V / DOHC with finger followers
LubricationPressure lubrication with 2 oil pumps
Primary Ratio24:73
Final Drive14:50
CoolingLiquid cooling system
ClutchWet multi-disc clutch / hydraulically operated
IgnitionKeihin EMS
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 Base1495 ± 10mm
Ground Clearance375mm
Seat Height992mm
Tank Capacity approx.7.5l
Weight Without Fuel approx.104.9kg
Specifications, features and prices to change by manufacturer without notice. All information correct as of posted date.
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