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Post by robinbanks on May 11, 2021 16:55:04 GMT
Is anyone knowledgeable about these? Cheers RB
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Post by BritPete on May 11, 2021 17:34:27 GMT
Is anyone knowledgeable about these? Cheers RB All I know is the Yam VT50 had one |
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Post by BritPete on May 11, 2021 17:58:01 GMT
Is anyone knowledgeable about these? Cheers RB All I know is the Yam VT50 had one |
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Post by buster on May 11, 2021 18:16:17 GMT
what do you want to know? they work fairly simply, I'll use kwak ones as an example (cos theyre familiar to me) basically you have a fuel pipe from tap to carbs, that pipe flows 'normal' fuel and also reserve fuel. when the tap is switched to reserve or on and you remove the pipe from the fuel tap nothing should come out, the tap is activated by a vacuum from the other (usually smaller) pipe. with the fuel line off there are two ways to get fuel from the tap, it should flow freely on prime, or take the vacuum pipe off (at the carb end) and suck on it (not really recommended but it does work) with the tap in either the on or reserve position. the vacuum you create by sucking should switch the tap on. hope all that makes sense (its been a long day, again)
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Post by robinbanks on May 11, 2021 18:19:01 GMT
what do you want to know? they work fairly simply, I'll use kwak ones as an example (cos theyre familiar to me) basically you have a fuel pipe from tap to carbs, that pipe flows 'normal' fuel and also reserve fuel. when the tap is switched to reserve or on and you remove the pipe from the fuel tap nothing should come out, the tap is activated by a vacuum from the other (usually smaller) pipe. with the fuel line off there are two ways to get fuel from the tap, it should flow freely on prime, or take the vacuum pipe off (at the carb end) and suck on it (not really recommended but it does work) with the tap in either the on or reserve position. the vacuum you create by sucking should switch the tap on. hope all that makes sense (its been a long day, again) So the one I got here says ON, PRI and RES........no off position. Am I right in thinking that to leave it in the ON position is like it being OFF on a traditional tap? |
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Post by robinbanks on May 11, 2021 18:23:07 GMT
Sorry, I meant to say the above when NOT running.
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Post by buster on May 11, 2021 18:24:15 GMT
what do you want to know? they work fairly simply, I'll use kwak ones as an example (cos theyre familiar to me) basically you have a fuel pipe from tap to carbs, that pipe flows 'normal' fuel and also reserve fuel. when the tap is switched to reserve or on and you remove the pipe from the fuel tap nothing should come out, the tap is activated by a vacuum from the other (usually smaller) pipe. with the fuel line off there are two ways to get fuel from the tap, it should flow freely on prime, or take the vacuum pipe off (at the carb end) and suck on it (not really recommended but it does work) with the tap in either the on or reserve position. the vacuum you create by sucking should switch the tap on. hope all that makes sense (its been a long day, again) So the one I got here says ON, PRI and RES........no off position. Am I right in thinking that to leave it in the ON position is like it being OFF on a traditional tap? yep, youve sussed it, unless the engine is running its off in both the on and reserve positions |
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Post by robinbanks on May 12, 2021 15:39:56 GMT
Thanks Buster.
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Post by buster on May 12, 2021 19:34:18 GMT
no probs
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Post by comstar on May 17, 2021 16:09:46 GMT
Just seen this post.
Co-incidentally I had to deal with a vaccum petcock over the weekend (getting a friend to drain off fuel from my 600 Bandit). I'm curious to know more Robin, do you suspect yours may be faulty? This is a well known weak spot on the GSF600 - over time they can fail if left on PRI (prime) and if any one of your carb float needles also fail then can this can end up filling the engine with fuel - not ideal !!!!
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Post by robinbanks on May 18, 2021 5:51:46 GMT
Thanks Nic. I suspect the tap is leaking in the ON position even when it is not on the PRI position as it shows those symptoms, leaking into the motor.
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Post by robinbanks on May 18, 2021 5:52:41 GMT
Maybe the diaphragms in the tap have gone after 26 off years.
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