The first service should be much, much more than a simple oil change. They should go over the entire bike and tighten, adjust, and check virtually everything.
Check your owners manual regarding what the 1000 km service entails.
And if they do the full service, as they should, expect ~$350.
p.s. If it's only an oil change you're doing, you can do it yourself for less than $35 (12 for filter, 20 for oil) in about 20 minutes.
Bookmarks