It's really up to you if you want to maintain the warranty or not, only a Suzuki dealer service will do that.
If it was my bike I'd change the oil and filter and ride it another year or to 20k miles where there might be some adjustment needed. Very few need any valve adjustments at 15k so at 11 you'll be fine.
But that's just me, I'm the sort that gets the first service and never goes back. That 7 year warranty is a good deal for Suzuki dealers, three minors and three major service's, money in the bank!