Being new to metric cruisers one question is burning in my mind. What kind of performance increases can be achieved through pipe/FI mods? On sportbikes you pretty much know that a quality pipe will get you 7-10 hp with proper mapping. With the 109, it seems the engineers spent a lot of time on the exhaust to get sound and performance and put a lot of chrome on them - I assume because they don't think the average customer will yank it off like a sportbike guy. Which brands of cruiser pipes typically deliver good HP increases AND maintain drivability (torque), and can we expect good things for the 109?