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Join Date: Nov 2007
Location: Chandler, Arizona
Not sure why you did what you did, or what you expected to gain from it. I did remove the complete CA emissions system and the complete evap system from mine, and made my own coasters from the stock reed valve covers. I did this mostly to get rid of several pounds of worthless junk, and a lot of unnecessary clutter. I was not expecting and did not get any performance gains. Later I went from stock pipes to V&H Cruzers, and had to upjet. Don't remember the numbers, I still have them around here somewhere, I think it was one size up on both the mains and pilots. Did that strictly for the sound, but after a few months of highway riding I found I hated the sound at high rpms, and reinstalled the stock system and jets. Sold the V&H system at a big loss.
The Vulcan 750 is a very carefully engineered motorcycle (it pretty much has to be, to keep running with all those zillions of parts, without falling apart) I don't recommend varying from stock, unless you have a specific goal in mind, and have thoroughly researched it.
There is precious little extra power to be found in the Vulcan engine if you want to keep it streetable, not enough to tell by riding it. Making mods that seem like they should make more power actually make no increase, or in some cases actually make less. And they almost reduce engine longevity, reliability, and performance. That "goats belly" that everyone seems to be in such a hurry to get rid of actually increases power by a small amount, plus it serves the function of a crossover between right and left (or front and rear) cylinder, something ALL multi cylindered bikes need, to balance the pressure in the exhaust. Yep, even Harleys have a crossover pipe between front and rear exhausts. Removing this will cause the engine to operate under more pressure and overheat, pretty much the same as plugging up the crankcase vent.
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