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Search results

  1. B

    Yet another petcock question

    Well after taking the petcock apart again and examining it given Steve's explanation, it appears the "tab" on the plastic block has been ground off and any "flat, curved spring" is missing. Thank you all again. Most helpful explanation.
  2. B

    Yet another petcock question

    Baatfam, thanks but I think​ I have it now. I also see you are a Triumph fan. I had a 2001 Trophy 1200 and my current ride is a 2013 Trophy. I just sold the Sprint GT.
  3. B

    Yet another petcock question

    OK, OK, I think I may have this figured out. I watched a video on Youtube and looked at a couple Google Images and.....what I have on my bike are 3 lines going to the carbs. I had (mistakenly) assumed they were all vent lines. I now feel there are 2 vent lines and the 3rd is the vacuum line. I...
  4. B

    Yet another petcock question

    Steve, Thank you for that explanation. I believe it is starting to make sense now. It looks as though more pieces have been removed from the petcock than I had originally thought. I will have a good look at it all when I get home from work. And I am sorry if my frustration comes across as...
  5. B

    Yet another petcock question

    Thank you all for your replies and I don't mean to sound ungrateful but I know exactly how vacuum petcocks work. What I don't understand is why/how this one is the way it is: it does not make sense. Someone has removed the spring. But with a spring in place, there is no prime position, so no way...
  6. B

    Yet another petcock question

    Hey Tom. Yes, looks like I'm just down the road. lol Yes, I realize the sending unit fitting should just be a drain. I get that. What is puzzling is that the petcock has no prime feature. If it is a vacuum petcock, why is there only on, reserve, and off? And all 4 carb boots, have screws...
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    Yet another petcock question

    I have recently purchased a 1979 GS750L with a mere 7,000 miles on the clock. Clearly, she's sat a while. I am slowly making my way through the systems but I admit I'm stumped by the petcock/carb area. In disassembling the petcock, there is clearly something that looks like a vacuum diaphragm on...
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