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D&D Dyna Switchback Exhaust

By July 24, 2013General Posts


My wife Jane bought a 2012 Dyna Switchback after 22 years of FXR ownership, and this new bike has become another test bed machine in terms of performance. To boost its power we had to consider a better performing exhaust for which we turned to D&D for one of their Fat Cat 2-into-1 full systems. Now after bolting it on we did a dyno test run to see what difference it immediately made prior to doing any tuning.  


Making any major changes such as fitting a performance exhaust such as the Fat Cat is going to affect the mixture set up with the old tune and as you can see from the bottom part of the graph, it became dangerously lean in places.