Just picked up a set of Yoshi's for the Storm (fraction of the RRP, thankyou Ebay!) to replace the old Honda pipes that had the baffles removed when I bought it. Wow, what a difference. I'd heard just the other week that removing the baffles stuffs it up a bit, and I'm tending to agree now as the bottom end is soooo much smoother with slightly more torque. I'd have a 'choppy' response to slight acceleration/twist of the throttle but that's completely gone now, slight twist with no worries (if that makes sense). So, throw those de-baffled exhausts and get some proper tuned stuff, makes a world of difference. Either that or just leave it standard.