Give the 17 a try - I don't think there would be any issues as long as the chain clears.
You getting a SVSF this weekend? What year is that? The dual plug heads after 2007 will most likely help efficiency.
I have the long SFV curved stacks, but the V-Strom (DL650) stacks are even longer.
This is the thread on SVRider with all the info, in case you haven't seen it lately -
https://www.svrider.com/forum/showth...ight=sv+stacks - post 69 references the DL650 stacks. Post 81 has part numbers for them.