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xs650 > > Motorcycle Systems > > Fuel > > Tanks & Petcocks |
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LDO107 Full Member
Joined: Jul 15, 2009 Posts: 63 Location: Pensacola Florida
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Posted: July 23, 2009, 10:43 am Post subject: Tanks & Petcocks |
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I was wondering why vacuum petcocks? I guess it's a good thing to keep you from contaminating your oil with fuel as well as walking into your garage with a pool of fuel on the floor. Is there a problem with using the regular non-vacuum petcocks, especially when using an aftermarket tank?
Also, must you have two?
y apologies for the dumb newb questions.
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schtipp Full Member
Joined: Jul 14, 2009 Posts: 81 Location: whitehall, pa
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Posted: July 23, 2009, 11:59 am Post subject: Re: Tanks & Petcocks |
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shouldn't be a problem. you do run the risk of the aformentioned trouble if your floa.t needle gets stuck. you can go to a single petcock if you like
_________________ if it's running, ride it... |
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nj1639 Full Member
Joined: Aug 22, 2007 Posts: 839 Location: Switzerland County, Indiana
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Posted: July 23, 2009, 12:49 pm Post subject: Re: Tanks & Petcocks |
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Vacuum petcocks and a sticking float will contaminate your oil, been there.
_________________ "Go ahead, turn the damn power and water off, I'm ready!
'83 xs650sk
www.650rider.com/index...pic&t=5392 |
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LDO107 Full Member
Joined: Jul 15, 2009 Posts: 63 Location: Pensacola Florida
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Posted: July 23, 2009, 3:24 pm Post subject: Re: Tanks & Petcocks |
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There would only be a problem if you forget to turn your petcock off though right? (unless it internally fails).
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nj1639 Full Member
Joined: Aug 22, 2007 Posts: 839 Location: Switzerland County, Indiana
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Posted: July 23, 2009, 5:06 pm Post subject: Re: Tanks & Petcocks |
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My petcock failed internally along with the sticking float.
Gas came out of the air filters and also into the crank.
In my past riding days my bike had the manual petcock so that's where I went with my xs.
_________________ "Go ahead, turn the damn power and water off, I'm ready!
'83 xs650sk
www.650rider.com/index...pic&t=5392 |
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Retiredgentleman 650Rider Supporter
Joined: Mar 03, 2007 Posts: 2258 Location: Calgary, Alberta 1978 XS650 SE
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Posted: July 23, 2009, 8:06 pm Post subject: Re: Tanks & Petcocks |
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The problem with vacuum petcocks is that they do not have an "Off" position. Yes, when the engine shuts down, they "should" close off tight, but because they are old they are not reliable.
I use 2 manual shut-off types and I know that off is really off.
_________________ Accel Coil, Pamco Ignition, Heiden Oil Filter/Cooler, VR-115 Regulator, Double Bridge Rectifier, 17/33 gearing, 55 mpg |
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