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Join Date: Nov 2007
Location: Chandler, Arizona
Since both cylinders don't fire at the same time, but alternately, the crossover allows the exhaust gases from the cylinder that just fired to use both mufflers on the way out. I had V&H pipes, with no crossover, and definitely lost power, though not enough to really matter on the VN750. The goats belly is actually referred to as a power chamber in some places. Aside from being just a pathway to allow exhaust gases from one side to cross over to the other side, it also serves as a resonator, or pre-muffler. It allows use of mufflers with lower back pressure to be used, without excessive noise. The setup you made could not be sold on a new bike, because it would exceed EPA noise levels.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike