2021 KTM 350SX-F
Off-Road / Dirt Bike Motorcycle for sale by MotoMember in Purcellville, Virginia 20132
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Engine & Exhaust
Engine: The engine of the 2020 KTM 350 SX-F is neatly arranged in a compact and light (58.6 lbs) construction. It features an innovative clutch system; perfectly geared, durable transmission, and a lightweight DOHC (double overheard camshaft) cylinder head, which all contribute to making it an extremely impressive engine. It also features a new, stronger oil pump intermediate gear, for improved reliability. Fitted with the latest electronic fuel injection system and a useful electric starter, just one push of a button fires up this impressively competitive engine.
Cylinder Head: The cylinder head on the KTM 350 SX-F is the gateway to its excellent power. It features two overhead camshafts with friction-optimized super-fine surfaces, connected to DLC coated finger followers that activate four lightweight titanium valves (intake 36.3 mm, exhaust 29.1 mm). KTM engineers have maximized the flow rate, delivering an optimal power band, with outstanding performance across the entire 13,400 rpm range.
Crankshaft: The KTM 350 SX-Fs crankshaft features a stiff design and utilizes a short, lightweight connecting rod, contributing to the incredibly dynamic and efficient power delivery. The big end bearing features two force-fitted bearing shells, which run directly on the crank pin. This design is a prerequisite for the extremely high engine speed levels and the unrivalled power of the 350 cc. The design also enhances durability, allowing for long crankshaft service intervals, resulting in less effort and cost - and more time spent on two wheels.
Crankcases And Engine Covers: The compact engine cases are manufactured using a high pressure die-cast production process that helps with weight reduction, while retaining strength and durability. The design allows for optimal shaft arrangements close to the center of gravity, resulting in ideal mass centralization and easier rideability. The engine covers feature a smart surface structure that reduces wear caused by the riders boots, keeping them looking as fresh as the day you bought it.
Transmission: The KTM 350 SX-F is fitted with a robust 5-speed transmission. The gear ratios were carried over from its predecessor and are perfectly suited for the MX track. Another highlight of the transmission is the no-dirt gear shifter. Similar to the footpeg design, it prevents the build-up of dirt and ensures the next gear is always available, no matter what the conditions.
Engine Management System: The state-of-the-art KEIHIN Engine Management System, with electronic fuel injection, features a 44 mm throttle body. The injector position guarantees optimal atomization of the fuel and air on the way to the combustion chamber, resulting in instant response and maximum performance when opening the throttle. There are also separate systems for cold starting and idle adjustment. The ECU features maps which have been developed to precisely match the exhaust and cylinder head, with options for regulating traction and launch control. It also provides different maps for each gear, according to the information received from the gear sensor, ensuring maximum power as you shift through the gears.
Cylinder And Piston: The 88 mm bore cylinder houses a lightweight, forged, bridged, box-type piston, made to the highest standards by CP. It has an extremely rigid structure and features a unique crown shape to suit the high-compression combustion chamber. The compression ratio is at 14:1 and thanks to the combination of low oscillating masses, the engine displays extremely lively characteristics.
SubcategoryOff-Road / Dirt Bike
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