petcock
in [Tech]
|
From: cliffsarrel on 8 Jul 2008 00:20 the importance of a properly functioning petcock on an older bike is monstrous. most old ones leak when off-just enough to build up gasoline in your OIL-BEWARE.... question-should i rebuild mine or get a new one for a 1981 xj750 seca if new-where???? peace
From: Who Me? on 8 Jul 2008 09:08 <cliffsarrel(a)hotmail.com> wrote > the importance of a properly functioning petcock on an older bike is > monstrous. > most old ones leak when off-just enough to build up gasoline in your > OIL-BEWARE.... > question-should i rebuild mine or get a new one for a 1981 xj750 seca > if new-where???? And another self-proclaimed expert.....who really knows nothing....rides into town !! Without a corresponding leaking needle valve or mal-adjusted float in the carb., a leaking petcock results in...........NOTHING. Certainly not gas in the oil.....unless the overflow in the carb is also blocked closed. You need to address your carb. problems first. There may not even BE a problem with the shut-off. If you ARE getting gas in the oil, it might be getting there while the engine is running.
From: Rick Cortese on 8 Jul 2008 15:22 Who Me? wrote: > > <cliffsarrel(a)hotmail.com> wrote > >> the importance of a properly functioning petcock on an older bike is >> monstrous. >> most old ones leak when off-just enough to build up gasoline in your >> OIL-BEWARE.... >> question-should i rebuild mine or get a new one for a 1981 xj750 seca >> if new-where???? > > > And another self-proclaimed expert.....who really knows nothing....rides > into town !! > > Without a corresponding leaking needle valve or mal-adjusted float in > the carb., a leaking petcock results in...........NOTHING. Certainly > not gas in the oil.....unless the overflow in the carb is also blocked > closed. Actually I don't keep my bikes in anything like an air conditioned garage or parking so the gas cooks off and leaves varish or some other indescribable goop in my carbs. Supposed to get to 108F today. I think the new ethanol mixes actually suck up water from the air which makes the situation a bit worse. The 2smokes' carb bowls fill up with oil so I can kid myself that it supplies extra lubrication when they start after a long time idle.<sic> Rick
From: . on 9 Jul 2008 00:20 On Jul 7, 9:20�pm, cliffsar...(a)hotmail.com wrote: > the importance of a properly functioning petcock on an older bike is > monstrous. > most old ones leak when off-just enough to build up gasoline in your > OIL-BEWARE.... If you're getting gasoline in your oil, you need to clean the float valves and the float valve seats. The smallest amount of gum and varnish on the seat will keep the float valve from shutting of gasoline at the right level. I have had to use a little bit of emery cloth on the end of a stick to remove a bit of crud so small I couldn't see it without a magnifying glass. > question-should i rebuild mine or get a new one for a 1981 xj750 seca > if new-where???? You can mail order the rubber parts from www.oldbikebarn.com or www.bikebandit.com Online parts companies charge about $10 for shipping and handling though...
From: cliffsarrel on 9 Jul 2008 15:14
On Jul 8, 8:08 am, "Who Me?" <hitchhi...(a)dont.panic> wrote: > <cliffsar...(a)hotmail.com> wrote > > > the importance of a properly functioning petcock on an older bike is > > monstrous. > > most old ones leak when off-just enough to build up gasoline in your > > OIL-BEWARE.... > > question-should i rebuild mine or get a new one for a 1981 xj750 seca > > if new-where???? > > And another self-proclaimed expert.....who really knows nothing....rides > into town !! > > Without a corresponding leaking needle valve or mal-adjusted float in the > carb., a leaking petcock results in...........NOTHING. Certainly not gas in > the oil.....unless the overflow in the carb is also blocked closed. > > You need to address your carb. problems first. > > There may not even BE a problem with the shut-off. If you ARE getting gas > in the oil, it might be getting there while the engine is running. rick your're right,i know next to nothing but getting to know more and willing to than the idiot who "rebuilt my carbs".i appreciate your knowledge and i do ride horses pretty well-carbs-well,i'm trying. someone posted that the floats on my 81 xj750 seca should top out at 18mm.Is this right?do you measure at the center of the bowl on the side of the float or at the front of the float? how can you tell iff the needle jets are leaking and what is the fix. pale rider |