Carburetor Starting Jet 45 for KTM LC4 400 620 640 1994-2001 - 57031551045

This genuine OEM Starting Jet 45 is a critical component for your motorcycle's carburetor system. It specifically regulates the fuel-to-air ratio during the engine's starting phase, ensuring reliable ignition and smooth idling when the engine is cold. As an original equipment manufacturer part, it guarantees precise fitment and factory-standard performance.

This part is compatible with a wide range of KTM models produced between 1994 and 2001. It fits the KTM 400 LC4-E, 400 SXC, 400 SX-C, 400 EXC, and 400 Duke. It is also designed for the KTM 620 SC, 620 LC-4 Competition, 620 Super-Moto, 620 SX, 620 Duke, 620 EGS, 620 LSE, 620 RXC-E, and 620 Rallye. Additionally, it fits the KTM 640 LC4, 640 Adventure, and 350 E-XC models across various regional specifications.

Manufactured from high-quality brass, this jet is built to resist corrosion and withstand the constant flow of fuel. The precision-drilled orifice ensures consistent fuel delivery, which is essential for maintaining the factory-spec performance of your carburetor. Replacing a clogged or worn starting jet can significantly improve cold-start reliability and overall throttle response.

Installation typically requires removing the carburetor float bowl to access the internal jets. We recommend cleaning the carburetor housing thoroughly before installing the new jet to prevent debris from blocking the small fuel passages. Regular inspection of your carburetor components helps maintain optimal engine health and fuel efficiency.

Check compatibility list below to see if this part fits your motorcycle model.