I have yet to pay for anything except regular maintenance.
I've had a warped rear brake caliper replaced, a timing issue, and had troubles in the beginning with a vacuum hose popping off... all were fixed without cost to me.
I've had one recall... to replace the bolts that hold the front fender on. Now that took a couple of weeks for the dealer to get the new bolts.
I have found that some "Original" Triumph parts have a "back order" status of several weeks... so I take the dealers recommendations on good after market parts... ie.. brake pads... I waited for 6 weeks on the brake caliper...