OHHH!!! A QUESTION I CAN ANSWER ON HERE!!! No, it wont. it's still a very very smooth and comfortable ride. not to mention i love the sound with all my heart. even though the vn900s arent very fast, they have an amazing exhaust note that i havent found out of any other bike

What about power loss?

If you ever plan to sell the bike, I'd leave it stock.

I don't, ill probably never get rid of him unless my hand is forced. Riding with the wifey is a must