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One wet cyclinder

  • Thread starter Thread starter yellow
  • Start date Start date
I'd say try replacing the simple and cheap part first... the vacuum line. Get something with the same interior diameter from your local auto parts store... :)
 
dark30 said:
Hi, this inquiry is in reference to arveejay's 5-6-06 post, the tests for petcock vacuum. I am having issues similar to the ones that appear in this thread, so I'm performing some tests.

When I suck on the vacuum line, fuel pours freely out the other nipple. That seems good.

However, when I apply the other test arveejay mentions--that of sucking the vacuum hose to my tongue to see if it will 'stick'--well, no dice. It won't hold the suction.

So with these results, mixed though they are, can I conclude that I do indeed have petcock issues?

(I really am happy there's a 'search' feature in this forum! Thanks, guys!)

Thanks in advance for any advice,
Kevin
GS750B
Click to expand...


If the vacuum line won't hold a vacuum to your tongue or baster or whatever your using, there is a leak at the diaphram in the petcock. Eventually it will flow gas thru that hose and directly into cylinder number 2 or it will get to the point that it won't shut the gas off. Best bet is to bite the bullet and get a new petcock from www.bikebandit.com Original equipment is the only way to go in my opinion.
 
Thanks, arveejay, for your confirming input. I'll get an order in right away. Cheers!
 
For many GS petcocks, you can buy a rebuild kit, which includes a new diaphragm. But really, test the hose first (take it off the bike, plug up one end, suck on it and see if it leaks).
 
Sorry, Joel, I should have mentioned that I did test the hose. It's solid, no leaks. Thanks for directing me to do that before I dumped some money on a new petcock or a repair kit.
 
I've rebuilt three with no issues whatsoever. I got my kits through Cycle Re-Cycle.
 
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