2013 KTM SX-F’s…Tested!! MX Vice

25 Май 2015 | Author: | Комментарии к записи 2013 KTM SX-F’s…Tested!! MX Vice отключены
KTM 250 SX F

2013 KTM SX-F’s…Tested!!

Sat with my UK test riders on the backseat of the on the way back to the airport, like a of delinquents, I was doing some (like I always do when it’s my ideal thought and when my mind is most In between thinking ‘if this doesn’t stop soon I’m to have to urinate in Dave ruck sack’ a whole of stuff raced through my in it’s usual diverse

One thought I do remember thinking to was this; ‘can a stock ever get so good it literally get any better for the average rider?’ The to which I quickly concluded is no, because life is driven by and secondly my bladder was now at breaking like an over filled and I had to concentrate on not putting myself in a of extreme embarrassment, the likes of I’d never live down!

By the above you’ve probably worked out that the 2013 KTM is good and my bladder is weak. KTM stepped it up again for 2013 and a reason for that – the other are closing the gap on the standard KTM have set in motocross races and selling

I’m not speculating at that, that’s what we were all told at the on the new bikes in Italy last the Austrian manufacture are aware the are closing in and want to stay on It’s hardly a surprise; if you closely you can see how much work the of Honda and Kawasaki in particular been putting into racing and development.

  Take the just gone, the World was dominated by Kawasaki winning all motos and they won two more in the US Suzuki and James Stewart won the two. KTM have got used to and dominating and so has everyone else. As the others will take satisfaction in taking wins them, it will hurt KTM like it would anyone

They have the capability to changes and upgrades to their and put those changes into faster than the Japanese and been one of their strengths. The couple of years their has been on the 350SX-F and while produced a stunning bike it gave the others the opportunity to in on them with the 250 and 450 fourstroke No wonder then that are the two bikes that KTM have their attention to for 2013 and the is in the pudding (talking of which was both nights we ate in Italy!)

So, get down to business. I’ll off by explaining the best I can, the of each SX-F bike and we’ll get into the technical Let’s kick off with the

450SX-F (£6895 – available in

On track…

This is the bike KTM hope will conquer Their intent is clear the acquisition of Roger DeCoster and Dungey and these two have an integral part in it’s just like Stefan did with the revolutionary 350SX-F. I can you right here and now, very much a different than it was before. For starters 2KG lighter (even with the kickstart) and my giddy aunt it make a difference!

The KTM motor was quick but the trade off seemed to be it was ‘a big bike’ to match the power. The model wasn’t as manoeuvrable as its but now this new one is so much easier to put you want it on the track, most in the air. The 2KG loss really up here because KTM have worked hard on reducing the masses.

The 2012 model in with its rivals wasn’t as to get into a turn, the weight seemed to want to push the wide. I guess that’s physics when you think it, more weight is harder to G forces and all that. Well now bike doesn’t have black mark against it.

It’s much easier to and with the improved ergonomics on the KTM SX and SX-F range (well get to later) it really is a much motorcycle in that department. shed some weight and is much more efficient for it, Dawn French can to relate to of

The power delivery is better It’s still a rocket but one you can at least control a little Again that’s down to of changes to the motor that work together to give a smoother power delivery tops out at 60BHP.

When on full tap it doesn’t really like it because you’ve got so smoothly – unlike before the KTM 450 wanted to rip your arms out of sockets like a fat Redneck into their first chicken at an all you can eat diner.

With the power delivery and lighter it’s much easier out of the turns as well as getting in There’s no apparent hard hit of you just roll it on (you don’t need to use or abuse the – you’ll only be slowing down if you do!) click the smooth gears (no problems too) and before you know it already braking into the corner.

As with all the new EFI bikes stupidly responsive with no of bogging but it’s now it’s than a Turkish barber’s with the improved EFI system KTM fitted and I just can’t see how any racer (or pro for that matter) can have issues with to wheel response ever If you feel you are losing milliseconds I suggest you look at your of lines, technique or fitness.

changed inside the engine…


The design of the cylinder is based on the 450 EXC engine, but features developed ports, combustion chamber and train. The lightweight titanium and the new, extremely lightweight of the rocker arms (intake arm is sliding on a DLC coated contact on the new cam shaft) allow for the rpm limit of and a high power output of 60 hp.

New weight optimised exhaust arms (intake DLC coated contact) » low oscillating mass for rpm

— Stiffer rocker arm with integrated oil jet for lubricating the cam » safe valve activation

Titanium intake and exhaust » minimum masses for high rpm

New ultra light valve and retainers » precise valve

— New weight optimised with optimised timing » power band, high

— New ports and combustion » maximum gas flow and ideal for max power output


Compared to MY 2012 the new 450 cc engine is more compact and is fitted engine cases produced in cast instead of sand This allows a thinner thickness and means a massive reduction of more than 2.5

— Engine cases in … cast instead of cast » reduced weight, finish of the surface

— New alloy material » more and protection against damage

Much more compact » increased ground clearance

and Cylinder

In the 95mm bore of the (predecessor 97mm) a new, optimised König piston a stiff box-in-box design a compression ratio of 12.6:1.

New lightweight forged König with stiff box-in-box and new compression ring and oil control » state-of-the-art engine design for performance

— Cylinder 95mm bore and mechanical tensioner » proven lightweight and solution


The lightweight crank shaft with a of 63.4 mm (predecessor 60.8 fitted with a Pankl rod featuring a pressure lubricated bearing (no more needle which allows a high rpm and doubles the maintenance intervals.

New Pankl conrod with bearing with pressure » allows a high rpm limiter to and guarantees minimal maintenance.

— Reduced crank inertia » more spontaneous delivery and easier handling.

Balance Shaft

The new 450 SX-F is fitted with a laterally counter balancer, which at the time drives the water This solution allows a compact and lightweight engine

— Laterally mounted balance shaft » efficient of vibrations.

— Counter works as a multifunctional shaft the water pump » lightweight and engine design.


The 450 is fitted with a reliable and electric starter. This is an feature and means a major especially when restarting a crash, even though solution means higher compared to a pure kickstart For those who want to reduce the to a minimum the 450 SX-F allows the start to be replaced with a

DDS Clutch

The DDS (Damped Diaphragm one-piece clutch basket with the primary gear is of high-strength steel. It guarantees reliability and contributes to the narrow size due to its compact rivet-less Additionally, it allows the use of thin linings, which makes the clutch package compact.

A spring makes it possible to an additional rubber damping guaranteeing reliability for the transmission and traction. The hydraulic clutch by in conjunction with the diaphragm guarantees a very light and good controllable modulation of the


A new 4-speed transmission was to perfectly suit the 450 cc power and provides easy and precise

— New 4-speed transmission » designed to fit the wide power of the new 450 cc engine


A new 65 alternator secures the energy to run the electronic fuel injection and charge the battery.

— New SX-EFI alternator with 65 » safe energy supply

(£6445 – available in August)

it different compared to the 2102 that’s for sure. Cutting to the chase, KTM have dominated class here in Europe at the championships. They’ve always rocketships in this category, up maybe last year they made a conscious to make a more user bike and spread the power evenly.

For 2013 they’ve back to what they do This bike is fast, no but you have to ride it more to reap the rewards of the all new singing and engine. For me and how I ride it’s not as suited a bike with mid to bottom torque but if you like to it out and rev a 250 then this will be a weapon of choice.

It churns out more than last and is half a kilo lighter and the all new 450 you can definitely notice it.

It’s off the bottom but with no immense where you think ‘s**t, quick’ so in that respect could be the perfect bike for the Joe because it only really up when you get in the mid to top power range. is where you can hold a gear maybe on last year’s you were better off changing up) and let it it. Trust me it’s fun when you do.

The is on tap at the top, this thing was up the steeper hills on the hard circuit.

On the handling front it felt an improved bike. The fork springs have the bike into corners as the feels more level in and because of that you don’t get a sense that the rear is to hit a braking bump and kick you in the like mule. It gives you confidence going into t and tracking a rut.

What’s inside the engine…


The basic design of the new DOHC head with four valves, two camshafts and finger follows the same design as the successful 350 SX-F but internally it is for the 250 engine without any compromise. to the predecessor the new 250 SX-F has larger an optimised combustion chamber, intake valves and new camshafts a significant power increase of + 5 hp.

— New state-of-the-art design » power output

— intake and outlet ports » gas flow

— Larger valves (30.9 32.5 mm, 26.5 mm)

— New cam shafts and new » better performance, improved band

— Newly water jacket » improved

Engine cases

The new 250 SX-F is now with completely new engine produced in high pressure cast instead of sand This is a precise casting for thinner wall thickness. means a massive weight together with the elimination of the casting.

— New design of the cases, high pressure cast instead of sand » reduced weight, better of the surface

— Elimination of the casting » weight reduction

New high-strength alloy material » ductility and protection against

Cylinder and piston

The newly cylinder carries a extremely box-in-box piston with a 2 diameter compared to MY 2012 (76 78 which allows higher rpm and space for larger valves due to the bore.

— New cylinder and larger bore » gives for large valves

— New box-in-box piston » reduced for low vibrations, high rpm range and durability


The completely new shaft has a 2.5 mm shorter … and less inertia for more power delivery. Like all the KTM bikes the crank shaft is with a Pankl connecting rod a plain bearing (no more bearing), which allows rpm and less maintenance.

— … » higher rpm range

Reduced inertia » more power delivery

— New conrod with plain » allows high rpm range up to min, guarantees reduced (crank shaft service 100 hours instead of 50)

Counter shaft

The new 250cc engine is now with a laterally mounted balance shaft, which at the time drives the water and timing chain. This allows a very compact and engine design.

— balance shaft for 250 SX-F » reduction of vibrations

— balancer works as a multifunctional driving water pump and chain » lightweight and compact design


Like all bikes the 250 SX-F is fitted a reliable and lightweight electric This is an outstanding feature and a major advantage especially restarting after a crash, though this solution higher weight compared to a kickstart engine. For maximal reduction the new engine no longer the option of mounting a kickstarter.

As by the KTM factory riders the advantage of the start is much more than the weight penalty.

Electric start only, no option » weight reduction

The new 250cc engine is fitted the same clutch as the 350 SX-F a lightweight, one piece CNC machined made of steel, which the use of thin steel linings for compactness. The Brembo hydraulic provides easy and precise

— New steel clutch combined with the primary » highest strength and reliability

New thinner steel linings » engine dimensions


The new gear box is adapted to the new engine and provides the same final ratios as the predecessor.

— designed 6-speed gear box » shifting

350SX-F (£6645 – in August)

On track…

Like the it’s faster with more than the 2012 What effectively has happened is the 450 and 350 have become closer to other. While the 450 has become to ride due to it leaning up the 350 still all the razz to throw it around 250 but now just packs more of So in the big bike class it gives the punter, a nice problem to

Which bike do you choose – a 450 or It’s almost like meet in the middle at 400! If an aggressive so and so out on the track then the 350 now has the to please you more.

If you like to use the of the motor then the 450 is the weapon to because at least now you can throw it a bit more and it doesn’t feel you’re trying to jump a

The 350 is a beaut! Thinking back KTM launched it I remember Stefan grinning like a Cheshire cat all the launch, he must have a like the Joker on this It is such a fun bike to ride. You can scream the nuts off it and the power is certainly enough for anyone than a top pro or you can shift a gear and use the fast but not frightening torque.

So in respect, it certainly caters for all of riders in the MX1 class. Don’t get me the 450 is some piece of kit and a much bike. If you’re of expert you should have the upper on a 450SX-F over a competitor on a because it obviously has more and if you use that correctly you’ll the 350 covered, but as I said, there much in it and the two bikes have closer to each other.

It good too. KTM have with the steel chassis but more refinements and with the to the suspension and ergonomics it has an even and nimble feel. With all the I never felt at any time they are unbalanced and I had that effect going on with the

I really think the new WP forks are a improvement and must take credit with the motor and work in making all the bikes an better package.

All the 2013 KTM range have received updates (below) and they all to me asking myself the question I at the start. Or course, it’s baby! KTM have once taken a good old John Minstry of silly walk stride in their evolution the 2013 range.

It’s a shot across the bows to the to let them know, not only how they are in trying to hold the domination of the European MX scene earned by working hard to from the Japanese manufactures but they mean serious, business as they wage war on soil. Seems like the are off more than ever the result of which, is our benefit as the mark gets higher and and KTM have raised the bar first for It’ll be interesting to see who the others ….

New engine management for all SX-F models

For 2013 the EMS was radically reworked. A new throttle features a bore of 44 instead of for higher airflow. Together an improved injector and a new injector (spraying upwards) the new EMS contributes a lot to the power increase. A new throttle sensor (TPS) is more against water and is protected by a guard. The wiring harness is improved with longer wire and critical connectors are now via rubber caps.

The small screen is now positioned in the quick-change line connector for easier The idle adjuster is now isolated the cold start button and in the back of the throttle body.

Newly developed throttle with a diameter of 44 instead of » higher gas flow for better

— New injector with spray pattern, new injector » improved spray for better

— New throttle position (TPS), additional protector » safety against water and reliability

— New rubber caps for connectors » better protection high-pressure power cleaner

New position of the micro screen in the fuel line connector » access for regular control and of the screen

Chassis and Ergonomic for 2013


Aluminium swing arm provides perfect at minimum weight. For MY2013 the arm is reinforced and now allows the mounting of a rear axle to work with the new frame concept for riding stability.

— swing arm in the rear part of the » improved stability and safety

Larger rear axle 20 to 25 mm) » higher strength and track

— Linkage with bolts and nuts » weight

Rear shock

The linkage suspension with WP shock was reworked for MY2013 for all models. some weight reductions of bearing cups and washers of the system the settings of the shocks been completely updated. In the 350 SX-F is fitted with a spring.

Of course it is KTM standard to individual clicker adjustment and high/low speed compression for any kind of rider and race

— Settings updated for all » improved overall balance and higher bottoming reserves increased comfort in small

— Harder spring for 350 » improved balance of the bike


The further improved 48 mm WP cartridge Upside-Down fork with completely reworked for all models and harder springs for 250 and 450 A newly developed fork oil reduced friction and improved for more constant damping during its entire life

— New, slightly settings for all models » better characteristics on fast, bumpy and for cornering

— Harder for 250 and 450 SX-F » improved balance, reserves

— Newly high performance fork oil 5 SAE 4) » reduced friction, better

— New seal rings SKF optimised material, colour from green to red » reduced improved sensitivity


and lightweight frame design of chromoly steel provides mix of stiffness and flexibility for maximum stability, easy handling and cornering.

— New 4-… with additional reinforcement in the head area » higher stiffness for better track

— The cradle tubes the engines of the 4-… frames are of thinner profiles » weight

— Newly designed stays (connection between head and frame) for all 4-strokes » handling and more precise

— New frame colour » appearance


After two years the bodywork is completely to further improve the bike and indicate clearly, that year 2013 means a new for KTM SX.

— New front fender new mounting system » up to 50% better

— New front start plate » fits perfectly to the new

— New modern spoiler produced in 2-component process plastic in one mould) » improved provide a slim feel, contact with the bike and hooking in with the boots

New airbox covers produced in process(orange/black plastic in one mould) » additional space for the filter, (optional) mounting point for fasteners

Fuel tank

The 7.5 fuel tanks have reworked for 2013 to match the of the new rad scoops for improved ergonomics. In they feature a new inner fuel cap.

— with new routing of fuel and hoses » 4-… SX tanks are with EXC tanks (larger for long distance races)

New inner screw-type fuel cap » the SX style, easier to handle

Micro screen (fuel located in-line in the quick » easy access for easier

Triple clamps

Further developed CNC machined clamps improve the bike´s and provide improved fork supporting the fork action due to friction and better bending In addition the lower clamp a weight reduction of 80g due to the reworked The front fender is attached by two on the bottom and two in the front.

— triple clamps » better weight reduction, improved clamping for reduced friction

New front fender attachment » fender stability


designed airbox and cover more space for the TWIN AIR New intake snorkels for all 4-… allow for better airflow and performance. The exchange of the airfilter is without any tools in just a few

The airbox cover features clips to be fixed, optionally it can be by an additional screw.

— New design provides more for the airfilter » better airflow, dirt to filter

— designed airbox cover » space to filter, optional with screw

— designed and stiffer intake » improved performance


strength EXCEL rims, CNC hubs and new spokes coated in guarantee maximum stability. The Mid Soft 32 tires stand for traction. A stronger rear (20 25 mm) improves the stability of the bike (as by Roger DeCoster and Ryan

— Spokes coated in » better corrosion resistance, new

— Larger rear diameter (20 25 mm) » improved corner and stability

— New bushings in the hub » adaption to 25 mm axle

— New stand » adaption to 25 mm axle

All models are fitted with new 827 Fatbar handlebars featuring the bend of the 996 Twin-Wall. New 2-compound with KTM logo provide contact to the bike.

— New 827 Fatbar handlebars » provide height with flatter for improved ergonomics

— New grips » better contact to the new look

Exhaust system

noise limits will be a challenge for every manufacturer, KTM put a lot of effort into developing new systems for all 4-… models, meet the tough limits of the season and even improve the performance.

— New header for all 4-strokes, for 250 and 350 SX-F new tapered sections and HRS (Header Resonator » significantly improved power and reduced noise

— New silencers with tapered tubes, individually developed for model » reduced noise better performance

Radiators and sytem

The proven cooling is transferring the cooling liquid the cylinder through the frame to the new WP radiators.

— The radiators by WP RADIATOR are produced in a new alloy more durability » stronger is resistant to structural changes in the of a crash


The proven brakes in combination with the discs and stainless steel lines provide the best performance. The rear caliper is adapted to the larger rear

— Reworked rear carrier » adapted to larger axle


A completely new design in conjunction with the new is a clear statement to underline the of the new SX generation.

— new appearance lightweight in-mould graphics on and airbox

The vital stats

KTM 250 SX F
KTM 250 SX F
KTM 250 SX F


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