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Join Date: Nov 2007
Location: Chandler, Arizona
While I was reinstalling the stock system on mine, I did start it up without the mufflers. I loved the sound at idle, but it would have been too loud at full throttle. I'm not out trying to blow someones eardrums out. And that nice throaty sound at idle becomes absolutely horrible on the highway. Just try it.
Also, by removing the mufflers, you are lowering the backpressure, and probably more than you might think. Rejetting will help compensate for it, but you will never get the mixture right across the entire usable rpm range. The one limitation to carbs I have found, is that they are only tunable over a small range. when the backpressure varies widely from idle to highway cruising speed, which it will without the mufflers, the carbs simply do not have the tuning range to cover all of it. You will be too rich in some spots, and too lean in others.
I just love the things these backyard engineers come up with. And I feel sorry for all those poor Vulcan 750s that become the victims of backyard engineering.
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