The 320 mm base gasket is the thickness "pivot" for any engine mechanic. Thicker than the 0.10 mm, it makes it possible to substantially raise the cylinder to release the high regimes by increasing the opening diagrams.
This seal is designed to fit perfectly to the casings of the competition line Kz10b, r1, r2 and brand new r3. Its manufacturing quality guarantees perfect sealing at the base of the cylinder, critical point to avoid any air intake that could deplete your carburation