TB Parts Replacement Piston Ring Set for the KLX110/DRZ110/Z125 143cc big bore kit. These are the same rings that come with our extremely popular 143cc big bore kit. If you have multiple seasons on your big bore kit it might be time to install a new set of rings. Installing new rings ensures your bike is running at top performance. We also have these rings listed with a top end gasket set for the complete install kit!