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Antony
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« on: May 05, 2019, 11:09:32 PM » |
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Hi fellow Valcarians. Having had a multitude of issues with a Valkyrie I bought last year, I'm going through a process of elimination to solve problems. 1 issue is that it needs a new petcock which is speeding it's way to me as I speak. The old one was essentially operating like a gravity fed is the internals were non existand, and to top it off, the vacuum tube wasn't even connected, it was just tucked away down through the frame like a breather pipe. So my question is: what does the other end connect to? I have a lot less tubing too because it has been desmogged at some stage. I'm hoping I'm not missing anything vital.
Also, there are 2 bent rubber hoses (1 on each side) between the rear and center carbs above the fuel inlet pipes. As soon as I open the fuel tape, fuel floods out of them rapidly, They don't appear to connect to anything. What is their purpose?
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Bone
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« Reply #1 on: May 06, 2019, 02:46:01 AM » |
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Some of us convert the petcock to a manual petcock by removing the insides.
Being manual the vacuum hose isn't needed.
I believe the vacuum source is the #6 carb if yours is desmogged the port may
have been plugged.
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SCain
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« Reply #3 on: May 06, 2019, 09:45:28 AM » |
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Hi fellow Valcarians. Having had a multitude of issues with a Valkyrie I bought last year, I'm going through a process of elimination to solve problems. 1 issue is that it needs a new petcock which is speeding it's way to me as I speak. The old one was essentially operating like a gravity fed is the internals were non existand, and to top it off, the vacuum tube wasn't even connected, it was just tucked away down through the frame like a breather pipe. So my question is: what does the other end connect to? I have a lot less tubing too because it has been desmogged at some stage. I'm hoping I'm not missing anything vital.
Also, there are 2 bent rubber hoses (1 on each side) between the rear and center carbs above the fuel inlet pipes. As soon as I open the fuel tape, fuel floods out of them rapidly, They don't appear to connect to anything. What is their purpose?
Vacuum operated petcock is normally routed to #6 intake, but it shouldn't matter which one you connect it to. The bent hoses are are open ended to allow the carbs to vent, they are normally routed into the rear carb crossbar into the two bottom holes. If you have fuel coming from these when you turn on the fuel, you have problems further into the carbs. |
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Steve  |
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Antony
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« Reply #5 on: May 06, 2019, 10:45:12 AM » |
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Hi fellow Valcarians. Having had a multitude of issues with a Valkyrie I bought last year, I'm going through a process of elimination to solve problems. 1 issue is that it needs a new petcock which is speeding it's way to me as I speak. The old one was essentially operating like a gravity fed is the internals were non existand, and to top it off, the vacuum tube wasn't even connected, it was just tucked away down through the frame like a breather pipe. So my question is: what does the other end connect to? I have a lot less tubing too because it has been desmogged at some stage. I'm hoping I'm not missing anything vital.
Also, there are 2 bent rubber hoses (1 on each side) between the rear and center carbs above the fuel inlet pipes. As soon as I open the fuel tape, fuel floods out of them rapidly, They don't appear to connect to anything. What is their purpose?
Prior to reinstalling my carbs, I gave them a 48hr bench test to check for leaks atc and there wasn't a problem. I didn't bother to drain the fuel from them prior to reinstalling. Is it possible that while reinstalling them, the fuel that was still in the carbs got somewhere it wasn't supposed to?  Vacuum operated petcock is normally routed to #6 intake, but it shouldn't matter which one you connect it to. The bent hoses are are open ended to allow the carbs to vent, they are normally routed into the rear carb crossbar into the two bottom holes. If you have fuel coming from these when you turn on the fuel, you have problems further into the carbs. |
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hubcapsc
Member
Posts: 16779
upstate
South Carolina
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« Reply #6 on: May 06, 2019, 12:05:38 PM » |
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I'd like to think if the petcock was intentionally converted to a gravity fed option, it would have been done better than this:Never underestimate the ingenuity of a previous owner   -Mike
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pancho
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« Reply #7 on: May 06, 2019, 01:37:56 PM » |
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As mentioned, those two "bent rubber hoses" are vents. If fuel is coming out of those when when your tap is open, you may have a stuck float valve,, maybe some rubber debris from the petcock diaphragms.?
Was the spring still inside the petcock when you opened it up? if not, someone had done that work purposely.
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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Antony
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« Reply #8 on: May 06, 2019, 11:04:21 PM » |
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As mentioned, those two "bent rubber hoses" are vents. If fuel is coming out of those when when your tap is open, you may have a stuck float valve,, maybe some rubber debris from the petcock diaphragms.?
Was the spring still inside the petcock when you opened it up? if not, someone had done that work purposely.
No spring to be found, but excess amounts of old diaphragm including a big chunk of the middle part of the diaphragm. |
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pancho
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« Reply #9 on: May 07, 2019, 05:03:53 AM » |
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Like Mike said.....Never underestimate the ingenuity of a previous owner
Nice clean test setup, you may need to clean out needle valve and fuel lines of rubber debris on leaking carb.
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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