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2014 KTM 450 SX-F

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The KTM 450 SX-F is a practical off roader built with versatility in mind. The bike is propelled by a 1 cylinder 4 Stroke, water cooled, 449.3 Cm³ (27.418 Cu In) engine which sends its power to the rear wheel through a 5 gear, claw shifted transmission. The engine is fed by a new, lightweight polythene tank with a capacity of 1.98 gallons.

All components are mounted on a modern frame made of lightweight, high strength chromoly steel sections that offers a perfect mix compromise between longitudinal stiffness with torsional rigidity.

As far as suspensions are concerned, the 2014 KTM 450 SX-F is equipped with a front WP Suspension up side down fork (4860 MXMA CC) and a rear WP Suspension shock absorber (5018 BAVP DCC).

The 2014 KTM 450 SX-F is offered with a base price of $8,999.

Hit the jump for more information on the KTM 450 SX-F.

Overview

KTM 450 SX-F

Power For All!

With the 450 SX-F, the KTM range offers a winner bike that draws potential from a large-displacement engine and a chassis perfectly tuned to handling its raw power. Ryan Dungey has used it to win the AMA 450 Motocross Championship and saw absolutely no reason to change bikes in order to defend his title. No wonder, as the compact SOHC engine with the groundbreaking injection technology guarantees brute but highly controllable power. Among the large 4-strokes, the 450 SX-F scores mainly with its performance and agility. It is the right choice for every motocross rider loking for torque and power with lots of control for racing.

Unrivalled handling:

KTM 450 SX-F

Wheels

The wheels use lighweight, cnc-machined hubs, high-end excel rims and spokes coated in black with lightweight aluminum nipples to achieve maximum stability at minimum weight. The oem dunlop geomax mx51 tires deliver perfect traction and outstanding performance.

Brakes

High-tech brembo brakes have always been standard equipment on ktm offroad bikes. Combined with the lightweight wave discs, they are the ultimate solution in braking technology. The sx models gain a newly-developed master cylinder with a new reservoir, a smaller piston diameter and optimized lever kinematics. Combined with optimized brake pads, this makes for another perceptible improvement of front brake performance and action.

Professional performance potential:

KTM 450 SX-F

Pistons

Inside the cylinder with a bore of 95mm, an extremely lightweight bridged-box-type piston delivers a major contribution to the engine’s low vibrations and engine-speed strength. The compression ratio is 12.6:1. Optimized for 2013, a new piston pin delivers more durability.

Cylinder head

Inside the 450 sx-f engine’s cylinder head, an overhead camshaft controls four ultra-lightweight titanium valves via extremely rigid rocker arms which are dlc-coated on the intake side. This configuration allows engine speeds up to 11,500rpm, a major contribution to the unique performance of the large displacement ktm engine. In 2013, a new three-layer head gasket is used that guarantees more durability under the most extreme conditions. In addition, the camshaft has received a strengthenend auto-decompression mechanism.

Crankshaft

The 450 sx-f’s crankshaft employs a plain big end bearing. Two force-fitted bearing shells run directly on the crank pin. The necessary oil feed for this bearing is ensured by the engine’s pressure lubrication. This design is a major prerequisite for the extremely high engine speed levels and unrivaled maximum power of the 450cc engine. Another decisive customer benefit is the crankshaft service interval which can be lengthened due to the plain bearing.

Transmission

For 2014, ktm has optimized its gear tooth geometry to provide customers with a lightweight 5-speed gear box with increased durability.

Clutch

The 450 sx-f employs the ktm-developed dds (damped diaphragm steel) clutch with a wear-free steel basket and extremely heat resistant clutch plates. This design is distinguished by employing a diaphragm spring instead of the usual coil springs, which makes for a considerably easier clutch action. Strengthened for 2013, the diaphragm spring also leaves sufficient space for a damping sytem integrated into the clutch hub, which benefits both traction and durability. A stronger inner hub further increases stability. The hydraulic brembo clutch mechanism with a new master cylinder guarantees a light operation and highly controllable modulation of the clutch.

Engine management system (ems)

In combination with the revolutionary injector position as developed by ktm, the keihin engine management system, with electronic fuel injection and 44mm throttle body provides the engine with a spontaneous response and maximum performance. For 2014, the wiring harness of the 450 sx-f has been further simplified and even higher quality wires and connectors are used. In order to protect them against pressure washers, many connectors are now enclosed in new rubber boots. With an optional map-select switch from the ktm powerparts program, ems continues to allow selecting different engine characteristics. In addition, the optional user-setting tool allows to readout engine data with a laptop and change the ignition and injection mappings with a few mouse clicks.

Counter balance shaft

The side-mounted counter balance shaft also drives the water pump. Thanks to the perfect mass balancing and the power plant’s low total oscillating masses, engine vibrations can be kept to a minimum even at the highest engine speeds.

Crankcase

The die-cast crankcase has been further developed by removing the kickstarter dome to achieve a weight reduction compared to its predecessor.

Electric starter

The 450 sx-f is fitted with an electric starter as standard - a clear advantage when it comes to crunch time in the heat of battle. In 2014, a newly-developed freewheel assembly is used to increase durability.

Engine

The compact 60hp power pack with a single overhead camshaft and the latest electronic fuel injection is distinguished by unrivaled performance and a highly efficient power delivery. Thanks to a revised crankscase, the weight is reduced for 2014.

Top ergonomics:

KTM 450 SX-F

Bodywork

In shaping the bodywork, the ktm designers’ ergonomic and design focus was to achieve complete harmony between rider and bike, down to the finest details. The front fender is a prime example of a moulded polymer component gaining maximum stability through a well thought-out structure and mounting.

Seat

Ergonomically perfect, the seat has received an improved foam core, ensuring greater comfort and durability.

Fuel tank

All models of the sx range have a new, lightweight polythene tank with a capacity of 1.98 gallons. The new filler cap with the inside thread makes for an easier and reliable closure. The 4-stroke models have the same fuel pump system as the 4-stroke enduro models, which makes it easy to fit a larger tank from the powerparts program.

Graphics

New classy graphics with clear lines visually underscore the exacting standards of what ktm deems a true, cutting-edge motocross bike.

Handlebar

All sx models are fitted with the super strong, tapered renthal fatbar 827 whose bend is especially well suited for the requirements of motocross. The proven standard ktm mount allows to fix the handlebar in four different positions. A large renthal crash pad in a classy combination of black and silver, offers effective crash protection for the rider.

Air box

The airbox design offers maximum protection of the air filter against soiling while ensuring maximum airflow for top performance. The twin air filter can be changed without tools in seconds, a standard for ktm.

Superior chassis:

KTM 450 SX-F

Frame

The state-of-the-art frame design made of lightweight, high-strength chromoly steel sections combines maximum longitudinal stiffness with optimum torsional rigidity. It guarantees easy handling and precise cornering, but also outstanding stability.

Suspension/damping

The rear monoshock as well as the 48mm upside-down front fork by wp suspension guarantee the best response and damping characteristics. In 2014, the fork has more reserves against bottoming out thanks to their optimized setting. Of course, compression and rebound damping can be adjusted to the track conditions and the rider’s preferences with a twist of the wrist - the rear monoshock even has separate high and low speed adjustments.

Triple clamps

Top-quality, cnc-machined triple clamps have been something of a ktm trademark. Ensuring a precise handling, they perceptibly support the flex characteristics, and with it, the fork’s action.

Swingarm

Designed using the latest in calculation and simulation software, the design and wall thickness of the cast aluminum swingarm have been optimized for minimum weight at optimum stiffness and precisely defined flexibility provides perfect stability at minimum weight. For 2014, the engineers have revised the chain guide to increase reliability while lowering the weight.

Exhaust system

The new 450 sx-f’s optimized silencer achieves outstanding performance at low noise levels.

Specifications

Engine type1-cylinder 4-stroke engine, water-cooled
Displacement449.3 cm³ (27.418 cu in)
Bore95 mm (3.74 in)
Stroke63.4 mm (2.496 in)
Starting aidElectric starter
Gearbox5-gear, claw shifted
Engine lubricationPressure circulation lubrication with two Eaton pumps
Primary transmission32:76
Secondary gear ratio14:50
CoolingWater cooling, permanent circulation of coolant by water pump
ClutchDDS Multidisc clutch in oil bath/hydraulically activated
IgnitionContactless controlled fully electronic ignition with digital ignition adjustment
FrameCentral tube frame made of chrome molybdenum steel tubing
ForkWP Suspension Up Side Down 4860 MXMA CC
Shock absorberWP Suspension 5018 BAVP DCC
Suspension travel Front300 mm (11.81 in)
Suspension travel Rear317 mm (12.48 in)
Brake systemDisc brakes, brake calipers on floating bearings
Brake discs - diameter Front260 mm (10.24 in)
Brake discs - diameter Rear220 mm (8.66 in)
Chain5/8 x 1/4"
Steering head angle63.5°
Wheelbase1,495±10 mm (58.86±0.39 in)
Ground clearance, unloaded371 mm (14.61 in)
Seat height, unloaded992 mm (39.06 in)
Total fuel tank capacity, approx.7.5 l (1.98 US gal) Super unleaded (ROZ 95/RON 95/PON 91)
Weight without fuel, approx.107.3 kg (236.6 lb.)
Price$8,999

Verdict

KTM 450 SX-F

The KTM 450 SX-F continues to be one of the most capable off-roaders in its class. Although it didn’t receive any major upgrades for 2014, the bike is slightly better than its predecessor. It handles better, it has a modern fuel tank, retuned suspensions and is also more than capable to deal with anything you ask of it.



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