SJ87.5-4 Mikuni HSR main jet N102-221, size 78.5

Fine-tuning a Mikuni carburetor requires high-quality brass components, and these EBC main jets from A-Bax Precision Engineering are up to the task. This size 78.5 jet is a direct replacement for Mikuni part number N102-221. These jets are designed to fit a wide variety of Mikuni applications, including the HS40 and the HSR42, HSR45, and HSR48 performance series. They are also compatible with BSR, SV650, and BN series carburetors like the BN38, BN44, and the BN-I range. Sold as a pack of four, these jets provide the accuracy and consistency required for a professional tune, helping you eliminate flat spots and achieve a smooth power band.