The MIKUNI Main Jet (Series 04/042) by PROX is specifically designed for MIKUNI carburetors VM18, including VM, TM, and TMX carburetors. Engineered for precision and performance, this main jet ensures your carburetor delivers optimal fuel flow for enhanced engine efficiency. Made from high-quality materials, it provides durability and longevity, making it a reliable choice for maintaining consistent engine performance. Whether you're looking to replace a worn jet or upgrade your carburetor system, the MIKUNI Main Jet offers a perfect fit and remarkable performance improvement.