KTM 450 SX-F FACTORY EDITION 2013: PROFESSIONAL PERFORMANCE POTENTIAL
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ENGINE
The 2013 450 SX-F Factory Edition engine cases and clutch cover have been redesigned to minimize weight by removing the kickstarter boss to save over 0.5lb and further reinforce the effectiveness of KTMs electric start system for racing. The 449.3cc SOHC SX-F engines EMS is updated and now provides 2 additional map settings plus the standard setting for another major benefit: more power. If you combine weight savings and the compact design with the unbelievable 60 hp, you end up with unparalleled power development and handling previously unheard of in the 450 class.
CYLINDER HEAD
This is precision engineering: a cylinder head designed for optimal motocross characteristics with a very broad rev range. In this extremely compact and lightweight construction, only one camshaft specially designed for the KTM SX-F actuates four titanium valves via weight-reduced rocker arms (DLC-coated on the intake side). Together with ultra-light valve springs and spring retainers, an engine speed of up to 11,500 1/min can be achieved for maximum power.
CRANKSHAFT
The crankshaft on the KTM 450 SX-F Factory Edition with a 63.4 mm stroke is equipped for 2013 with a revolutionary plain bearing. This means that the conventional needle bearing is replaced by 2 press-fit bearing shells in the ultra-light Pankl connecting rod, which run directly on the crankshaft's additionally reinforced crank pin. The sliding bearing is supplied with oil directly from the pressurized oil circuit via the crankshaft. In other words: No problem when it comes to rev limits, and the need for servicing the crankshaft is halved. And, because the reciprocating mass has been reduced, traction is improved and the engine still maintains a lightweight feel.
