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Join Date: Nov 2007
Location: Chandler, Arizona
There are two lines connected to the carbs with a T fitting. One is on the right side of the bike, it is the carb vent hose. There are 2 separate vent hoses, one for each carb. They are connected together into a single hose with a T fitting, and it then connects to the right air filter housing. The end is supposed to be open to the atmosphere, so it doesn't matter if it is hanging loose, as long as it is not kinked, plugged, or otherwise obstructed.
The other T is in the vacuum line to the right side of the rear carb, where it splits up, connects to the air injection valve, and also connects to the CA evap emissions crap.
I don't know what the hose with a T you are describing might be, follow it and see where it connects to.
I definitely do not recommend putting Gumout into motorcycle carbs, it dissolves rubber and plastic parts.
If you had rust in the tank, it is possible some got into the carbs, and is preventing the float needle valves from seating. Seafoam (or Gumout) neither one will remove rust, or solid particles of any kind. You have to disassemble the carbs to get that out. I recommend removing the carbs, taking them apart, giving them a thorough cleaning, and possibly replacing any rubber or plastic parts that may have been damaged by the Gumout, paying particular attention to the tip of the float needle valves. If the carbs are overfilling, the gas HAS to be getting through the needle valve assemblies. 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