But thats a non-stock pipe on what was probably not a tune matched bike. Better bet would have been to ride a stock one. Then again I had no issues when I put this Spark pipe on my SP2 without so much as a tune. A little lope at idle wasn't a bother and I didn't feel any need to have to rev it like I was looking for attention. And then once tuned it simply became a demon. And of course the cool factor of the Woolich software being able to warm the bike up for you