HJ370-4 Mikuni hex head main jets 4/042, size 370

For those running Mikuni carburetors, these EBC hex head main jets are a staple for any serious tuning project. Manufactured by A-BAX Precision Engineering, these size 370 jets are built to the 4/042 pattern, ensuring a perfect seat and accurate flow. They are compatible with a broad range of Mikuni carbs, including the VM series, VM-18, VM24-512, VM26-606, and TMX models. Whether you are building a custom Shovelhead or a performance-oriented Evolution, getting the main circuit right is key to top-end power. These jets are sold as a pack of four, providing excellent value and the peace of mind that comes with using precision-engineered components in your fuel system.