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Join Date: Nov 2007
Location: Chandler, Arizona
I definitely agree with using Seafoam, I use it in all 5 of my bikes, at least as much as I can afford. It works wonders for removing old gas residue. But there is a new issue out there now. Ethanol gas. It melts rubber, rusts steel, and corrodes aluminum and brass. Since ethanol is heavier than gas, if left to sit, it will find it's way to the bottom of the tank, or the float bowls, and in the case of the VN750, that little place on the bottom of the carbs where the jets are. The gas will evaporate, leaving the usual deposits, but the ethanol stays longer, and will start corrosion on the surface of the float bowls. Like rust, once corrosion starts, it doesn't stop. I have taken apart carbs that were so badly corroded that the float bowls had to be replaced. Found an old Goldwing with all 4 carbs in that condition. You can get fuel stabilizer designed for use with ethanol, I have never used it, but have been told it does not work well.
As for the damaged diaphragm on my carb, I have no idea how fuel even got to it. It is something that should not require maintenance. I find it odd that the rear one was perfect after 12 years, but the front one was badly damaged. Neither cover had ever been off.
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