Does your 2015 have the laser cut key like the 2018? My 2012 is the old double sided, cut with a grinder type key. I was thinking they changed over to the new style in 2016.I ordered a pack of blanks from Amazon. They were listed for a CBR. They fit perfect.
Ace hardware had a "sidewinder" key machine and was able to cut my blank from e-bay at no charge. Several other key shops looked at my original and new blank and declined. If the "key guy" looks perplexed, grab it back b/4 he screws it up.