hey all, happy easter, just finished fitting quiet baffles to my short shots, prick of a job getting to the baffle retaining screws, have to take off theheat shields, i ended up drill ing holes (for better or for worse) in the heat shields to make it easier to change the baffles next time as they will end up needing new fibreglass wrap at some stage.
now the sound, slightly quieter but definately deeper note, notice it more on the bike than just listening to it standing next to it, extra back pressure can't hurt either.... so far I would say it is worth doing but would recommend fitting these right from new, much easier to fit when the pipes are off the b.
OK its my wedding anniversary so better do the right thing and take the missus down to the pub on the bike
I was going to start a new thread, but found this article on another website.
http://www.motorcycle-usa.com/568/3099/Motorcycle-Article/Harley-Davidson-XR1200-Gets-D-D-Exhaust-.aspx
D&D has a secret weapon in reduced noise reduction and significant mid-range torque gain - Dr. Bob Woods from University of Texas at Arlington Mechanical & Aerospace Engineering department along with his students Erin Busk, Eric Luke, Robby Bernard and Thomas Cross have collaborated with D&D Performance Enterprises on a new exhaust pipe technology for Harley-Davidson's 2009 XR1200 motorcycle. The new technology is called the Concentric Flow Baffle System, which is fitted into the factory's new XR1200 exhaust pipe called the Bob Cat exhaust. The Bob Cat is the first D&D pipe to utilize this new technology. The benefit of using the system includes reduced noise, performance improvement and enhanced Harley-rumble. The Bob Cat is the perfect aftermarket exhaust trifecta. "I want to thank Dr. Bob and his team for collaborating with D&D in the design of this new baffle system," said Dave Rash, The Pope of Pipe. "It's a testament to their engineering knowledge and capability that led us to this breakthrough technology." D&D's Concentric Flow Baffle System will first appear on the XR1200 full system exhaust in March 2009 and will be available in all Harley models by the 3rd quarter 2009 About D&D Performance Enterprises In 1972 David Rash could not find the exhaust pipe he needed for his race bike. He knew that the proper exhaust for his engine configuration would give him an edge over his competition so he fabricated one himself. Thirty years and 250,000 pipes later D&D Performance Exhaust systems are some of the leading performance motorcycle exhaust systems in the world.
I have highlighted the interesting bit...........tc
D&D exhausts, don't know if they are available in Oz. Maybe someone else knows, and I won't have to search the www.
