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KTM 450 SX-F 2017: DROP THE HAMMER

SKU
Utsalgspris kr81.900

Beskrivelse

 If gold is what you’re after, a 450 SX-F is what you get. Thanks to its compact engine delivering explosive but controllable power, it’s the weapon of choice for the Red Bull KTM Factory Team and their champ, Ryan Dungey. Ridden at its hardest, this bike is quick enough to rule the AMA Supercross Championship. Its secret? Sweet handling and gut-wrenching grunt. Winners, line up here.   

ENGINE

The hugely successful 450 SX-F powerhouse

has extremely compact dimensions, strong

performance throughout the rev range and a

low weight; this is the lightest 450 engine on the

MX market. But that doesn’t mean it’s not a

heavyweight in terms of muscle. Fitted with a

single overhead camshaft cylinder head and

the latest electronic fuel injection, it pumps out

an unrivaled 62hp. With KTM’s engineers

working tirelessly to increase service intervals,

this super stroker has the latest engine

management technology on board and

confidently shoots both amateurs and pros

to the top of their time sheets.

CYLINDER HEAD                                 CRANKSHAFT

Inside the SOHC cylinder head, an overhead                The 450 SX-F’s crankshaft utilizes a short

camshaft controls the gas flow through the           connecting rod, which makes for an overall

ports. This activates four ultra-lightweight          compact and lightweight engine with a snappy

titanium valves via extremely rigid rocker arms,               power delivery. A plain big-end bearing with

which are DLC-coated on the intake side. A            two force-fitted bearing shells runs directly on

configuration like this allows engine speeds of                  the crank pin. The necessary oil feed for this

up to 11,500rpm; a baffling figure for a large                bearing is ensured by the engine’s pressurized

displacement thumper. New lateral brackets,                   lubrication. This design is a decisive benefit in

made of aluminum instead of steel, allow an              terms of the crankshaft service interval, which

efficient fixation of the engine to the frame and                  can be lengthened due to the plain bearing. So

contribute to the bike’s featherweight.                             rest assured and pin it, all day long.

ENGINE MANAGEMENT SYSTEM                               ENGINE CASES AND COVERS

The state-of-the-art Keihin Engine                               The design of the die-cast engine cases allows

Management System with electronic fuel                for minimal weight and a very centralized shaft

injection features a 44mm throttle body. Thanks                  configuration. This makes the engine short and

to its unique injector position, the engine’s                         compact, while contributing to an efficient

response is instantaneous. And to make life                         centralization of masses. The engine covers

even easier, separate systems for cold starts                     also feature a solid surface structure, which

and idle adjustment await you. The lightweight                      reduces the wear caused by the rider’s boots.

ECU features a unique traction and launch                     This way, your gem will keep on shining as it

control system for lightning-quick response                                             did on the day you bought it.

                                                                                           when the bar drops and maximized grip thanks

                                                                                           to different maps that sync with to the gear

                                                                                          you’re in. As an ultimate bonus, the rider can

                                                                                         unleash an even more powerful mapping via

                                                                                             the handlebar map switch.

TRANSMISSION                                                      CLUTCH

The 450 SX-F uses a lightweight 4-speed                   The 450 SX-F employs the KTM-developed

gearbox with gear ratios that are perfectly                   DDS clutch (damped diaphragm steel) with a

matched to the power delivery of its large                         wear-free steel basket and extremely heat

displacement engine. The 1st and 3rd gears                        resistant clutch plates. This clever design

are treated with a special surface coating for                       employs a diaphragm spring instead of the

better reliability. An advanced ´No Dirt´ gear                           usual coil springs, which makes for a

lever design prevents mud and sand from                            considerably easier clutch action. A diaphragm

blocking the joint of the lever and guarantees                        spring also leaves sufficient space for a

safe shifting. All 4-stroke engines are fitted with               damping system to be integrated into the clutch

a gear sensor, giving the option of different                 hub. The goal was traction, yes, but durability

engine characteristics for each gear. On the US                      as well. On top of that, it is fitted with a lighter

market, the 450 SX-F is delivered with a                       basket, a reworked inner hub and a pressure

5-speed gearbox in order to leave the rest in                    plate providing better oil supply and

your wake out in the desert.                                             unsurpassed cooling. Of course, light operation

                                                                                 and telepathic amounts of control are what

                                                                                  makes this particular clutch, a hydraulic

                                                                                    Brembo clutch.

COUNTER BALANCE SHAFT                              CYLINDER AND PISTON

The side mounted counter balance shaft also              Inside the short cylinder - featuring a bore of

drives the water pump. Thanks to its perfect                95mm - sits an extremely light, box-in-box type

balance and low oscillating masses, engine                piston that delivers a major contribution to the

vibrations are kept to a minimum. Even when              engine’s low vibrations while it handles high

revving it all the way up to the maximum, just                                 engine speeds with ease.

the way an SX-F likes it.                                                                          

TECHNICAL DETAILS

ENGINE

Design 1-cylinder, 4-stroke
Displacement 449.9 cm³
Bore 95 mm
Stroke 63.4 mm
Starting aid Electric starter
Transmission 4-speed
Engine lubrication Mixture oil lubrication
Primary drive 31:76
Secondary ratio 13:48
Cooling Water-cooled
Clutch Wet, DDS multi-disc clutch, brembo hydraulics                                           
EMS Keihin EMS

CHASSIS

Frame 25CrMo4 steel central-tube frame
Front suspension WP-USD, AER 48, Ø48 mm
Rear suspension WP shock absorber with linkage
Suspension travel Front 310 mm
Suspension travel Rear 300 mm
Brake system Front Disc brake
Brake system Rear Disc brake
Brake discs - diameter front 260 mm
Brake discs - diameter rear 220 mm
Chain 5/8 x 1/4”
Steering head angle 63.9°
Wheelbase 1485±10 mm
Ground clearance, unloaded 370 mm
Seat height, unloaded 960 mm
Fuel tank capacity, approx. 7 l
Unleaded premium fuel (98 octane), mixed with 2-stroke engine oil (1:40)
Weight without fuel, approx. 100.2 kg

                                                              

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