Normally a service is just an oil change and a new replacement filter - so far so good (well perhaps a new spark plug as well, oh and checking the valve clearances!).
If however you are rebuilding the engine, then carful inspection of the oil pump and oil cooler assemblies would well worth while. Any potential problems can be nipped in the bud with preventative maintenance, or replacement of a key component that is showing wear or damage?
Other related lubrication components you may wish to consider:
Pro-workshop gasket sealant: 08C70K0234M. Easy to apply with results to professional levels of excellence.
Add as many items as you wish to the same shopping cart, new O-rings 0928012008 anti-vibe mounts 0932010015 & spacers 0918006310 for example, and still only pay the same single fixed price shipping cost.
This component may have other applications within the Suzuki model range, so please check the part-numbers you order are correct for your model.