This kit contains OEM quality O-Rings & Exhaust Gasket without the high price of OEM. Finally eliminate those those messy leaks with this kit! New O-Rings for your tappet covers and cam cover along with a new exhaust gasket. These are great if you are installing a new dress up kit or just need to fix a leaking O-ring. This is a great kit to have on hand as it fits all years of the Kawasaki Z125.