Guest smittypig24 Posted April 29, 2013 Share Posted April 29, 2013 I bought a project bike ('91 VFR) in October and I'm just now getting around to working on it. Upon trying to start it, gas started pouring out below the carbs. It started on starter fluid, so I know it's eventually going to run. So now I am cleaning the carbs. Some of the jets were clogged. But I noticed 2 hoses with bolts jammed in them. When I took the carbs off and tipped them over, gas came out of them. My manual says they are air vent hoses, but why is gas coming out? Can anyone explain them to me? And why do they have bolts in them? I'm assuming the previous owner did that for some reason. Thanks. Link to comment Share on other sites More sharing options...
Member Contributer YoshiHNS Posted April 29, 2013 Member Contributer Share Posted April 29, 2013 Did you drain the carb bowls before you started the rebuild? Link to comment Share on other sites More sharing options...
VIFFER93 Posted April 29, 2013 Share Posted April 29, 2013 Two bolts in those holes are the first red flag. Remove them. Second fuel is coming out of them because it is coming out of the bowls, this is the way it is designed to work. The floats needles are stuck open or not adjusted properly preventing the needles from closing when fuel is in bowl. You are flooding the motor with fuel which is why it runs on starter fluid and not on fuel. You have to remove the floats and float needles. Clean them very very well and then reset them. It takes a little time and more patience to do this, very very small adjustments on the floats tangs makes a huge difference. The correct float height is 9.0mm This will save me a bunch of typing. http://justkdx.dirtrider.net/floatlevel.html. While not VFR specific it covers the basics. Make sure the engine Vee is free from fuel before you try starting the motor to be safe. If someone stuck bolts in the carbs to stop the overflow, go through the rest of the bike. Who knows what else has been done. Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted April 30, 2013 Member Contributer Share Posted April 30, 2013 Go to bikebandit.com thet have a parts break down. here's the link http://www.bikebandit.com/houseofmotorcycles/1991-honda-interceptor-750-vfr750f/o/m151579#sch8405 Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted April 30, 2013 Member Contributer Share Posted April 30, 2013 But its looks like the vent tubes for the bowls. Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted April 30, 2013 Member Contributer Share Posted April 30, 2013 Here's a pretty good pic's from viffer93 Link to comment Share on other sites More sharing options...
VIFFER93 Posted April 30, 2013 Share Posted April 30, 2013 Picture one is the float port (look for screw driver in upper right) x 4 Picture two is the top of the carbs showing the path of the fuel "in" from tank and the carb overflow lines. If the floats (not in picture) are not set correctly then they will not stop the flow of fuel from entering into the bowl and get the overflow you are seeing. Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted May 1, 2013 Member Contributer Share Posted May 1, 2013 There you go. Link to comment Share on other sites More sharing options...
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