[MT-2500]

You just named it in upper post. Tune Up.
Like they say sparks plugs to start with.
And sometimes just sparks plugs is called a tune up
The old fashion tune up used to cover checking everything even battery cables hose and belts antifreeze and general look over.
But for a good complete tune up check plugs and fuel and air filter and pcv valve and good idea to check fuel pressure for specs and fuel pressure reg leakage.
Also watch for codes in coomputer system.
And watch that MAF sensor for dirt accumalation.
MT-2500