Join Date: Jun 2009
Location: Valley Springs, Ca
On the smaller bikes (ie, the 856 and 790 engines), the cross over pipe is to help scavange the spent exhaust gasses because it allows the exhaust to flow through both pipes at the same time. If you open up the exhaust system with freer flowing pipes I believe you can eliminate the cross over pipe with no ill effects.
I debaffled the stock pipes on my America and eliminated the cross over pipe and love the difference in the sound. It sounds more like the classic Triumph engines because you can hear the individual cylinder pulses.
08 America, 904 kit, Bub slip ons, A/I removed, emissions "stuff" & air box removed, billet intakes, UNI Pods, carbs balanced, intminators, Progressive 412's, 1" risers, Corbin seat with driver back rest, TP USA Option 2 Igniter, 813 cams