non klr but fun for klristas

[jeffsaline]

Listers, I thought I was pretty familiar with the stock KLR650 vacuum controlled petcock until about 10 minutes ago. I just learned the petcock vacuum diaphragm system has a vent. My Clymers manual, M474-3, for 1987-2007 KLRs has the information on the vent. See Chapter 8, Fuel System, and look under "Fuel Valve". The manual has some good pictures and descriptions. Of course we know there has to be a passage in the petcock back cover to allow vacuum from the carb to transfer to the spring loaded side of the diaphragm. But what I've never paid attention to before is there must be a vent on the other side of the diaphragm to allow atmospheric pressure to pass and allow the diaphragm to move. If the vent is clogged the diaphragm will drag when vacuum is applied. If you look at the right/rear side of the petcock when it's install on the fuel tank you can see behind the fuel outlet nipple a small opening on the plastic spacer between the petcock main body and the rear cover of the petcock. It's about 1/3 of the way up the side of the petcock from the bottom. It is also on the main body side of the spacer. This is the vent opening. If it is dirty/clogged the diaphragm system will not operate as designed. I had to use a mirror and flashlight to see this area on a KLR in my shop. For riders having issues with fuel delivery from the petcock this might be the issue or part of the issue. I've never heard anyone mention this vent before so thought I'd post it here and see if anyone comes up with an obvious clogged petcock diaphragm vent system. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . ____________________________________________________________ Protect Voting Rights! Stand with the DGA. Tell Congress to reinstate the Voting Rights Act. http://thirdpartyoffers.juno.com/TGL3141/51d088bc2c0ea8bb1febst04vuc

[Jud]

Jeff, you are truly a great American. Here you are with a blockoff plate for sale that renders the vent and the entire diaphragm nugatory (a nice piece that works a treat I might add), yet at the same time, advancing the knowledge of the marque in order to make it easier for KLRists to keep their diaphragm-operated petcocks.

--- In DSN_KLR650@yahoogroups.com, wrote: > > Listers, > > I thought I was pretty familiar with the stock KLR650 vacuum controlled > petcock until about 10 minutes ago. I just learned the petcock vacuum > diaphragm system has a vent. > > My Clymers manual, M474-3, for 1987-2007 KLRs has the information on the > vent. See Chapter 8, Fuel System, and look under "Fuel Valve". The > manual has some good pictures and descriptions. > > Of course we know there has to be a passage in the petcock back cover to > allow vacuum from the carb to transfer to the spring loaded side of the > diaphragm. But what I've never paid attention to before is there must be > a vent on the other side of the diaphragm to allow atmospheric pressure > to pass and allow the diaphragm to move. If the vent is clogged the > diaphragm will drag when vacuum is applied. > > If you look at the right/rear side of the petcock when it's install on > the fuel tank you can see behind the fuel outlet nipple a small opening > on the plastic spacer between the petcock main body and the rear cover of > the petcock. It's about 1/3 of the way up the side of the petcock from > the bottom. It is also on the main body side of the spacer. This is the > vent opening. If it is dirty/clogged the diaphragm system will not > operate as designed. I had to use a mirror and flashlight to see this > area on a KLR in my shop. > > For riders having issues with fuel delivery from the petcock this might > be the issue or part of the issue. > > I've never heard anyone mention this vent before so thought I'd post it > here and see if anyone comes up with an obvious clogged petcock diaphragm > vent system. > > Best, > > Jeff Saline > ABC # 4412 South Dakota Airmarshal > Airheads Beemer Club www.airheads.org > The Beautiful Black Hills of South Dakota > 75 R90/6, 03 KLR650 > > . > . > . > > ____________________________________________________________ > Protect Voting Rights! > Stand with the DGA. Tell Congress to reinstate the Voting Rights Act. > http://thirdpartyoffers.juno.com/TGL3141/51d088bc2c0ea8bb1febst04vuc >

[mark ward]

GREAT post As you said, It's just common sense there would HAVE TO BE a vent, Yet as many times as I have skimmed threw the Clymer, I never seen it, or heard it mentioned. AND It's right down there in the COLLECT DIRT area. Working with Gas stoves, ALL Gas regulators HAVE THE VENT, and IS USUALY the "Issue" when it gets replaced. (instead of cleaned, or protected.) I have Cleaned and or replaced at least a few hundred, yet did NOT think about it on the KLR. AS USUAL .......THANKS JEFF

>________________________________ > From: "salinej1@..." >To: DSN_klr650@yahoogroups.com >Sent: Sunday, June 30, 2013 3:35 PM >Subject: [DSN_KLR650] Petcock Vacuum Diaphragm VENT > > >Listers, > >I thought I was pretty familiar with the stock KLR650 vacuum controlled >petcock until about 10 minutes ago. I just learned the petcock vacuum >diaphragm system has a vent. > >My Clymers manual, M474-3, for 1987-2007 KLRs has the information on the >vent. See Chapter 8, Fuel System, and look under "Fuel Valve". The >manual has some good pictures and descriptions. > >Of course we know there has to be a passage in the petcock back cover to >allow vacuum from the carb to transfer to the spring loaded side of the >diaphragm. But what I've never paid attention to before is there must be >a vent on the other side of the diaphragm to allow atmospheric pressure >to pass and allow the diaphragm to move. If the vent is clogged the >diaphragm will drag when vacuum is applied. > >If you look at the right/rear side of the petcock when it's install on >the fuel tank you can see behind the fuel outlet nipple a small opening >on the plastic spacer between the petcock main body and the rear cover of >the petcock. It's about 1/3 of the way up the side of the petcock from >the bottom. It is also on the main body side of the spacer. This is the >vent opening. If it is dirty/clogged the diaphragm system will not >operate as designed. I had to use a mirror and flashlight to see this >area on a KLR in my shop. > >For riders having issues with fuel delivery from the petcock this might >be the issue or part of the issue. > >I've never heard anyone mention this vent before so thought I'd post it >here and see if anyone comes up with an obvious clogged petcock diaphragm >vent system. > >Best, > >Jeff Saline >ABC # 4412 South Dakota Airmarshal >Airheads Beemer Club www.airheads.org >The Beautiful Black Hills of South Dakota >75 R90/6, 03 KLR650 > >. >. >. > >____________________________________________________________ >Protect Voting Rights! >Stand with the DGA. Tell Congress to reinstate the Voting Rights Act. >http://thirdpartyoffers.juno.com/TGL3141/51d088bc2c0ea8bb1febst04vuc > > >------------------------------------ > >List Sponsors - Dual Sport News: http://www.dualsportnews.com/ >Arrowhead Motorsports: http://www.arrowheadmotorsports.com/ >List FAQ courtesy of Chris Krok: http://www.bigcee.com/klr650faq.html >Members Map https://maps.google.com/maps/ms?msid=212558560286766214899.0004d0fa9f1732283bb6f&msa=0&ll=38.522384,-109.489746&spn=6.831383,9.624023Yahoo! Groups Links > > > > > >

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[mark ward]

HEY Jeff is...... Just like Santa, in, A miracle on 34th. street.

>________________________________ > From: Jud >To: DSN_KLR650@yahoogroups.com >Sent: Sunday, June 30, 2013 5:04 PM >Subject: [DSN_KLR650] Re: Petcock Vacuum Diaphragm VENT > > > >Jeff, you are truly a great American. Here you are with a blockoff plate for sale that renders the vent and the entire diaphragm nugatory (a nice piece that works a treat I might add), yet at the same time, advancing the knowledge of the marque in order to make it easier for KLRists to keep their diaphragm-operated petcocks. > >--- In mailto:DSN_KLR650%40yahoogroups.com, wrote: >> >> Listers, >> >> I thought I was pretty familiar with the stock KLR650 vacuum controlled >> petcock until about 10 minutes ago. I just learned the petcock vacuum >> diaphragm system has a vent. >> >> My Clymers manual, M474-3, for 1987-2007 KLRs has the information on the >> vent. See Chapter 8, Fuel System, and look under "Fuel Valve". The >> manual has some good pictures and descriptions. >> >> Of course we know there has to be a passage in the petcock back cover to >> allow vacuum from the carb to transfer to the spring loaded side of the >> diaphragm. But what I've never paid attention to before is there must be >> a vent on the other side of the diaphragm to allow atmospheric pressure >> to pass and allow the diaphragm to move. If the vent is clogged the >> diaphragm will drag when vacuum is applied. >> >> If you look at the right/rear side of the petcock when it's install on >> the fuel tank you can see behind the fuel outlet nipple a small opening >> on the plastic spacer between the petcock main body and the rear cover of >> the petcock. It's about 1/3 of the way up the side of the petcock from >> the bottom. It is also on the main body side of the spacer. This is the >> vent opening. If it is dirty/clogged the diaphragm system will not >> operate as designed. I had to use a mirror and flashlight to see this >> area on a KLR in my shop. >> >> For riders having issues with fuel delivery from the petcock this might >> be the issue or part of the issue. >> >> I've never heard anyone mention this vent before so thought I'd post it >> here and see if anyone comes up with an obvious clogged petcock diaphragm >> vent system. >> >> Best, >> >> Jeff Saline >> ABC # 4412 South Dakota Airmarshal >> Airheads Beemer Club www.airheads.org >> The Beautiful Black Hills of South Dakota >> 75 R90/6, 03 KLR650 >> >> . >> . >> . >> >> __________________________________________________________ >> Protect Voting Rights! >> Stand with the DGA. Tell Congress to reinstate the Voting Rights Act. >> http://thirdpartyoffers.juno.com/TGL3141/51d088bc2c0ea8bb1febst04vuc >> > > >

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[James W. Flower]

So, what's the intended advantage to the complicated vacuum system over the simple gravity system?

[dclarkzeiss]

So, what's the intended advantage to the complicated vacuum system over the simple gravity system? When the engine is off there is no vacuum, i.e. no more gravity fuel flow into the carb. Over long periods of time gas evaporating out of the carb leaves varnish and deposits in it. This is a fix for those of us who are too lazy (myself included) to turn off the gas when we're done riding.

On 7/7/2013 2:56 PM, James W. Flower wrote: > So, what's the intended advantage to the complicated vacuum system over the simple gravity system? > > ------------------------------------ > > List Sponsors - Dual Sport News: http://www.dualsportnews.com > Arrowhead Motorsports: http://www.arrowheadmotorsports.com > List FAQ courtesy of Chris Krok: http://www.bigcee.com/klr650faq.html > Members Map https://maps.google.com/maps/ms?msid=212558560286766214899.0004d0fa9f1732283bb6f&msa=0&ll=38.522384,-109.489746&spn=6.831383,9.624023Yahoo! Groups Links > > > >

[jeffsaline]

On Sun, 7 Jul 2013 11:56:55 -0700 "James W. Flower" writes:

> So, what's the intended advantage to the complicated vacuum system > over the simple gravity system?

<><><><><> <><><><><> James, The vacuum shut off petcock and the manual petcock are both gravity feed. The vacuum shutoff is an automatic of sorts shutoff while the manual requires action from the rider. More problems are reported with the vacuum system such as a leaking diaphragm and poor fuel flow. The manual system seems to either work or not. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . . . ____________________________________________________________ Want to place your ad here? Advertise on United Online http://thirdpartyoffers.juno.com/TGL3141/51d9dc46efb8e5c465d9bst03vuc

[Fred Hink]

Working in the motorcycle business in the 70s before vacuum petcocks were widely adopted, I can remember several fires that were started by floats sticking with the manual petcocks and flooding garage floors with gasoline. Any source or ignition (hot-water heaters, electrical devices etc) could set off this spilled gas and the garage contents or the house would be lost. Unless you are religious about turning off your manual petcock when you park your bike, I don t think the risks involved are worth it to me. It s not about if your float will stick but when. You pays your money and takes your chances. Fred http://www.arrowheadmotorsports.com From: salinej1@... Sent: Sunday, July 07, 2013 3:22 PM To: jwflower53@... Cc: DSN_KLR650@yahoogroups.com Subject: Re: [DSN_KLR650] Re: Petcock Vacuum Diaphragm VENT On Sun, 7 Jul 2013 11:56:55 -0700 "James W. Flower" writes:

> So, what's the intended advantage to the complicated vacuum system > over the simple gravity system?

<><><><><> <><><><><> James, The vacuum shut off petcock and the manual petcock are both gravity feed. The vacuum shutoff is an automatic of sorts shutoff while the manual requires action from the rider. More problems are reported with the vacuum system such as a leaking diaphragm and poor fuel flow. The manual system seems to either work or not. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . . . __________________________________________________________ Want to place your ad here? Advertise on United Online http://thirdpartyoffers.juno.com/TGL3141/51d9dc46efb8e5c465d9bst03vuc [Non-text portions of this message have been removed]

[dooden]

Wise Advise Fred !!! Whats wrong with a disabled fuel flow when its just sitting there ? I replaced (1) One Diaphram in the petcock since I bought it new in 2001. When we had a local shop, he had one on the shelve, cost me like $13 bucks. Wooooooo spent way more on WD-40 for cleaning the chain in less time. That said, my four wheeler has on/off/res and I always remember to switch it to OFF when parking it... but I grew up on the old style. Know your Machine. Dooden A15 Green Ape

--- In DSN_KLR650@yahoogroups.com, "Fred Hink" wrote: > > Working in the motorcycle business in the 70s before vacuum petcocks were widely adopted, I can remember several fires that were started by floats sticking with the manual petcocks and flooding garage floors with gasoline. Any source or ignition (hot-water heaters, electrical devices etc) could set off this spilled gas and the garage contents or the house would be lost. Unless you are religious about turning off your manual petcock when you park your bike, I don t think the risks involved are worth it to me. It s not about if your float will stick but when. > > You pays your money and takes your chances. > > Fred > http://www.arrowheadmotorsports.com > > > > From: salinej1@... > Sent: Sunday, July 07, 2013 3:22 PM > To: jwflower53@... > Cc: DSN_KLR650@yahoogroups.com > Subject: Re: [DSN_KLR650] Re: Petcock Vacuum Diaphragm VENT > > > On Sun, 7 Jul 2013 11:56:55 -0700 "James W. Flower" > writes: > > So, what's the intended advantage to the complicated vacuum system > > over the simple gravity system? > <><><><><> > <><><><><> > > James, > > The vacuum shut off petcock and the manual petcock are both gravity feed. > > The vacuum shutoff is an automatic of sorts shutoff while the manual > requires action from the rider. > > More problems are reported with the vacuum system such as a leaking > diaphragm and poor fuel flow. > > The manual system seems to either work or not. > > Best, > > Jeff Saline > ABC # 4412 South Dakota Airmarshal > Airheads Beemer Club www.airheads.org > The Beautiful Black Hills of South Dakota > 75 R90/6, 03 KLR650 > > . > . > . > . > . > > __________________________________________________________ > Want to place your ad here? > Advertise on United Online > http://thirdpartyoffers.juno.com/TGL3141/51d9dc46efb8e5c465d9bst03vuc > > > > > [Non-text portions of this message have been removed] >

[Eddie]

They still sell a helmet sticker that says, "Turn the gas on, Dummy!" =) Thing is, both my bikes now are fuel injected. =( Sorta like seeing a "Power Commander" decal on a carburetted bike. A "gas" sticker would be cool to the uninitiated and dumb to those of us who actually ride. LOL eddie

----- Original Message ----- From: Dooden To: DSN_KLR650@yahoogroups.com Sent: Monday, July 08, 2013 7:19 PM Subject: [DSN_KLR650] Re: Petcock Vacuum Diaphragm VENT Wise Advise Fred !!! Whats wrong with a disabled fuel flow when its just sitting there ? I replaced (1) One Diaphram in the petcock since I bought it new in 2001. When we had a local shop, he had one on the shelve, cost me like $13 bucks. Wooooooo spent way more on WD-40 for cleaning the chain in less time. That said, my four wheeler has on/off/res and I always remember to switch it to OFF when parking it... but I grew up on the old style. Know your Machine. Dooden A15 Green Ape --- In DSN_KLR650@yahoogroups.com, "Fred Hink" wrote: > > Working in the motorcycle business in the 70s before vacuum petcocks were > widely adopted, I can remember several fires that were started by floats > sticking with the manual petcocks and flooding garage floors with > gasoline. Any source or ignition (hot-water heaters, electrical devices > etc) could set off this spilled gas and the garage contents or the house > would be lost. Unless you are religious about turning off your manual > petcock when you park your bike, I don ?Tt think the risks involved are > worth it to me. It ?Ts not about if your float will stick but when. > > You pays your money and takes your chances. > > Fred > http://www.arrowheadmotorsports.com > > > > From: salinej1@... > Sent: Sunday, July 07, 2013 3:22 PM > To: jwflower53@... > Cc: DSN_KLR650@yahoogroups.com > Subject: Re: [DSN_KLR650] Re: Petcock Vacuum Diaphragm VENT > > > On Sun, 7 Jul 2013 11:56:55 -0700 "James W. Flower" > writes: > > So, what's the intended advantage to the complicated vacuum system > > over the simple gravity system? > <><><><><> > <><><><><> > > James, > > The vacuum shut off petcock and the manual petcock are both gravity feed. > > The vacuum shutoff is an automatic of sorts shutoff while the manual > requires action from the rider. > > More problems are reported with the vacuum system such as a leaking > diaphragm and poor fuel flow. > > The manual system seems to either work or not. > > Best, > > Jeff Saline > ABC # 4412 South Dakota Airmarshal > Airheads Beemer Club www.airheads.org > The Beautiful Black Hills of South Dakota > 75 R90/6, 03 KLR650 > > . > . > . > . > . > > __________________________________________________________ > Want to place your ad here? > Advertise on United Online > http://thirdpartyoffers.juno.com/TGL3141/51d9dc46efb8e5c465d9bst03vuc > > > > > [Non-text portions of this message have been removed] >