My Bonnie is carbed, but I suspect you would need to remap with the preds installed because they're much less restrictive than the stock exhausts. My dealer told me not to be afraid to ride my bike hard during the break in period, but I have read elsewhere some dealers say to take it easy. Maybe ask your dealer for their thoughts on this matter? With the amount of riding I do, the stock seat suits me just fine. Don't know that I'd care to take a long trip with the stocker, though. Many have switched to the gel seat, or gone the Corbin seat route (pricey). Hope this helps.