The 2023 KTM SX-F range once again comprises three core models, namely the rev-happy KTM 250 SX-F, giant-killing KTM 350 SX-F, and the range-topping KTM 450 SX-F. The latter is the perfect example of advanced engineering techniques at a Factory Racing level finding their way on a production motorcycle. The engine of the new KTM 450 EXC-F 2017 bike has the bore of 95 mm, and it has the forged box-in-box type piston with the ultra-light piston pin. Its geometry is perfectly designed to the combustion chamber. The new bike has the SOHC cylinder head and the new overhead camshaft which now controls the gas flow through optimized ports. Don Williams. -. May 1, 2023. 2024 KTM 300 XC. The six-bike 2024 KTM Cross Country lineup is here. Consisting of three XC two-strokes and a trio of XC-F four-strokes in essentially identical In North America that range is: 150, 250 and 300 XC-W two-stroke enduro models, 350 and 500 EXC-F Dual Sport bikes alongside the 350 and 500 XW-F, plus a 450 XCF-W, enduro four-stroke. As expected from the updates for the EXC range follow a pattern already set by the SX and XC machines last year, albeit with some significant changes across what 01/FORK, TRIPLE CLAMP Remove o-ring . Remove protector ring Remove the lower triple clamp with the steering stem. Remove the upper steering head bearing. 500100-10 Installing the lower triple clamp (EXC-R SIX DAYS, XCR-W USA) Clean the bearing and sealing elements, check for damage, and grease. Long-life grease ( P. The KTM 450 EXC-F features a robust 6-speed transmission made by PANKL Racing Systems. The gears are made of a strong, forged raw material, ensuring the highest durability and reliability level. All four-stroke engines are fitted with a gear sensor, giving the option of different engine characteristics for each gear. Chassis Weight (without fuel) 105.5 kg Tank capacity (approx.) 9.2 l Front brake disc diameter 260 mm Rear brake disc diameter 220 mm Front brake Disc brake Rear brake Disc brake Chain X-Ring 5/8 x 1/4" Frame design Central double-cradle-type 25CrMo4 steel Front suspension WP XPLOR-USD, Ø 48 mm 2019 KTM 450 XC-F. When maximum attack is required, the only answer is the 450 XC-F. The compact SOHC engine delivers explosive power in a smooth, usable delivery that suits both weekend riders and seasoned racers alike. More to the point, the 2019 450 XC-F shares 95% of its parts with the multiple championship winning 450 SX-F motocross bike. Generator. The 350 EXC-F engine is equipped with a 196 W AC generator with integrated starter freewheel. The generator provides sufficient energy for the fuel injection, lighting and other electrical loads. Compared to the 350 SX-F, the oil-cooled rotor has a larger diameter with a bigger flywheel mass and requires a larger ignition cover. The KTM 150 EXC engine has been given a new piston, which has been cast instead of forged and will bring increased performance in terms of consistency. The 4-strokes sees the KTM 450 EXC-F and KTM 500 EXC-F models provided with a reworked shift locker. THE 2021 UPDATES AT A GLANCE. KTM EXC 2021 – New 2021 colors and graphics 7uuH.