KTM 450 SX-F 2014

With the 450 SX‑F. KTM has a winning motorcycle in its range. which derives its potential from a high-capacity engine and a chassis perfectly tuned to the power unit. Ryan Dungey won the 2012 title in the AMA MX1 class with this machine and he saw no reason whatsoever to change bikes for his title defence. No wonder; the compact SOHC engine guarantees brutal yet controllable power with its revolutionary injection technology. Above all. the 450 SX‑F scores highly compared with other large four-strokes in terms of performance and handling. It's the right choice for every motocross rider in the MX1 class for whom torque and performance combined with controllable rideability are pivotal.
KTM engineers have focussed on designing the bodywork ergonomically and functionally in such a way that the whole motorcycle is in perfect harmony with the rider down to the very last detail. The front fender is a perfect example of how moulded plastic components can gain maximum stability with a well thought out structure and well-conceived attachment.
The ergonomically perfectly designed seat is equipped with an improved foam core for the 2014 model year. ensuring both greater comfort and higher stability.
All SX models are equipped with the extremely sturdy. tapered Renthal Fatbar 827 handlebar that features an offset specially designed to meet the demands of motocross. In accordance with the proven KTM standard. the handlebar can be fixed in a choice of four positions. A large Renthal crash pad. still in classy black/silver for 2014. provides the rider with effective impact protection.
A new. refined graphic design with clear lines underlines the high demands made of a modern. state-of-the-art offroad motorcycle.
Both the rear shock absorber and the 48 mm upside-down fork from WP Suspension guarantee ultimate damping and responsiveness. Thanks to optimised tuning. the telescopic fork excels with even higher reserves against bottoming out in MY 2014. Naturally. rebound and compression damping can be adapted individually to the track and rider in no time at all – while high and low-speed compression damping can also be adjusted on the rear shock absorber.
High-tech brakes from Brembo have always been standard equipment on KTM offroad bikes and. together with the lightweight wave brake discs. they are the measure of all things in terms of brake technology. A newly developed handbrake armature has been employed for the 2014 model year. with new remote reservoir. smaller brake piston diameter and new levers with optimised lever kinematics. As a result and thanks to optimised brake pads. performance and application of the front brake have been perceptibly improved again.
The compact 60hp powerhouse. featuring an overhead camshaft and state-of-the-art electronic fuel injection system. excels with unrivalled performance and highly efficient power development. Modifications to the engine case have further reduced the weight for the 2014 model year.
In the cylinder head of the 450 SX‑F engine. an overhead camshaft actuates four ultra-light titanium valves via extremely stiff. DLC-coated rocker arms on the intake side. This configuration allows engine speeds of over 11.000 rpm to be achieved and makes a major contribution to the unique performance of the high-capacity KTM engine. A new. three-layer. cylinder head gasket has been fitted for the 2014 model year. which guarantees even greater durability in the most extreme conditions. Furthermore. the now lightened camshaft has a strengthened auto-decompression mechanism at its disposal.
The laterally positioned balancer shaft acts simultaneously as a drive for the water pump. Thanks to the perfect counterbalancing and lower reciprocating weight of the power unit. it has been possible to keep engine vibration within narrow limits. even at the highest revs.
Manufactured in a die-casting process. the engine case has been further refined for the 2014 model year. It has been possible to further reduce weight compared to its predecessor by eliminating the kickstarter dome.
The 450 SX‑F engine is fitted with the DDS (Damped Diaphragm Steel) clutch developed by KTM. which features a wear-free steel cage and extremely heat-resistant friction linings. This design is distinguished by use of a diaphragm spring instead of the otherwise customary conical springs. thereby reducing the operating force substantially. The stronger design of diaphragm spring for MY 2014 also provides space for integrated hub damping – a benefit in terms of traction and durability. Reinforced for the 2014 model year. the inner clutch hub likewise guarantees even greater durability. The hydraulic clutch actuation system from Brembo. with new clutch armature. ensures smooth and very precise clutch control.
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