Put the stock pipes that millions of dollars were spent engineering for the bike back on it. It´ll sound great. YOU CANT MAKE IT SOUND LIKE A HARLEY-EVER! Sorry, Its a well engineered, counterbalanced, Fuel injected Digitally Fired electronic ignition bike. Its a Honda. If it were a Single Pin Crank, W a carb(s) over jetted and timing retarded and unbalanced (like a Harley) you might have a fighting chance. I just bought one, and have had several, the closest i came to a lopey sounding one was my 99 Ace Aero 1100, and that was single pin vibration/carbuerated hell. It still sounded horrible with pipes and a tune... Sell the Pipes, throw the stock ones on it, tune down a stage or two and ride the hell out of it knowing you wont have any issues for 100K miles.... And if you do its cheaper to fix.