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Join Date: Nov 2007
Location: Chandler, Arizona
The Vulcan 750 is known for starting problems. Owners have done all kinds of things to try and solve the issue. I have not messed with the ignition coil pickup adjustment, but I did install an AGM battery, gapped the plugs just a hair less than what the manual calls for, removed and thoroughly cleaned the inside of the starter, and have turned the pilot screws out a full 3 turns. If started every day or two, it starts fine. If you let it set for a week, it can be hard to start. I believe this is caused by gas evaporating out of the float bowls.
Seafoam is good stuff, but costs about the same as it's weight in gold. For that reason I don't use very much of it. What I do, is about every 3 months, drain the gas out of the carbs, disconnect the fuel lines from the petcock, and fill the float bowls full of Seafoam through the fuel lines, let it soak for 24 hours, then drain it out. I use the remainder of the 16 oz can in the next 2 tankfuls of gas. I have 4 other bikes, and don't use Seafoam in any of them, I only use it in the Vulcan because it is such a PITA to remove and clean the carbs.
Are you a member of the ICP? Jerry.
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