Hi and
The Zed has a 9000 mile service interval and is done on the basis of P1, P2, P1, P3. with 30k on the clock you have either yet to have the second P1 with is really nothing more than an oil and filter change, or it's coming up for the P3 which is the major one. I'm not sure exactly what this entails as I haven't had one on mine yet, bit I'm sure someone will be along soon with the info you need.