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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Gas leaking, reason unknown /cgi-bin/YaBB.pl?num=1499285959 Message started by whitesavage on 07/05/17 at 13:19:18 |
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Title: Gas leaking, reason unknown Post by whitesavage on 07/05/17 at 13:19:18 Hi guys, writing from faraway Estonia (Europe, that is). Today I noticed a problem with my Suzuki LS650P, from 2005 - as I pulled the bike from garage, pulled out choke and started the engine, I noticed a gas leak. It was clearly running along the fuel hose and then dripping below. It seemed to be coming from some place above the petcock. When I stopped the engine, the leak stopped. Then tried again and started the engine (then without the choke), the leak started again. Afterwards I went back to garage to check and there were no signs of gas leak, so it seems that it leaked only while running. It's my first bike and I bought it this spring and haven't been able to ride it much (besides bringing it home with my brother and rolling a bit on the little street in front of the house) as I'm waiting for my driving license. So I'm a total newb in this, but already know that a gas leak like this is definitely not okay... The bike was brought from the US in 2007 and has some small rust marks that are waiting to be dealt with. Although I don't think that there's rust under the gas tank that causes the leak, because the bike doesn't seem to be leaking when standing still. And it has been standing still in my garage for about a month before today. The tank is rather full and oil was changed this spring. The fuel hose seems fine, not dry or cracked. The petcock is set to "on". It was really hard to tell where did the gas come from, "above the petcock" is my best guess for now. Do you have any ideas what could be the cause? I see that the petcock is a problem on these bikes and I have a stock one, I guess. Could that be it? Or could there be a problem or jamming in the carb? Although there was no leak on the carb itself. Or is it still the tank, somehow? I think the leak was definitely not there when we rode it home at the end of May. Then I also put the tank full. I would appreciate any help. |
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Title: Re: Gas leaking, reason unknown Post by ero4444 on 07/05/17 at 13:50:48 don't hear about leaks too much, but I'd replace the automatic petcock with a manual and avoid that problem that seems inevitable. It is an easy swap and may fix the leak too. Can't think of a place on the petcock that would leak from above the output line, unless the little gaskets s at the tank are missing or the screws are loose. |
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Title: Re: Gas leaking, reason unknown Post by verslagen1 on 07/05/17 at 13:52:30 Because it happens when the bike is on, most likely the leak will be either on the diaphragm or on the outlet hose. the diaphragm is on the backside and is vacuum operated. there's a valve in there and allows gas to it when on. replacing the gasket isn't hard, just use a gas proof adhesive instead. but we'd recommend just replacing the petcock anyway. if it's over 5 years old, depending on your type of gas (we have ethanol) it's due to fail anyway. |
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Title: Re: Gas leaking, reason unknown Post by batman on 07/05/17 at 19:33:36 I'd replace the fuel line also as it looks to have been shortened (it looks kinked where it goes on the petcock, and there's two different style clamps ) and it may be rotting on the inside due to age. |
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Title: Re: Gas leaking, reason unknown Post by jcstokes on 07/05/17 at 19:59:23 As you may have read on this forum, the best replacement petcock is the Yamaha 660 Raptor type. Get the genuine one and don't get a cheaper or smaller version off EBAY or similar. I'm surprised Verslagen or one of the others haven't given you the Yamaha part number. |
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Title: Re: Gas leaking, reason unknown Post by batman on 07/07/17 at 21:20:07 YAMAHA RAPTOR 660-yfm660r part # 5LP-24500-01-00 |
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Title: Re: Gas leaking, reason unknown Post by whitesavage on 07/10/17 at 11:45:21 Thank you very much for the advice and the petcock number. Haven't been able to check for some possible loose screws under the tank as I unfortunately sprained my knee and need a mechanic myself at the moment ::) But what's your experience - I guess it's necessary to remove the tank to check for the tank gaskets or screws..? Otherwise I wouldn't able to see what's exactly happening down there? Or could you check these joints without removing the tank? |
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Title: Re: Gas leaking, reason unknown Post by justin_o_guy2 on 07/10/17 at 11:56:38 It's possible to change the petcock without removing the tank. |
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Title: Re: Gas leaking, reason unknown Post by Eegore on 07/10/17 at 14:19:01 687771766B6C5D6D5D65777B30020 wrote:
You only need to take out the 2 screws holding it to the tank and replace with the new one. Just drain the tank first of course. Then cut the vacuum line to the carb, fold it over and hose-clamp it. All this can be done from a chair, nothing other than the stock petcock needs to come off. |
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Title: Re: Gas leaking, reason unknown Post by batman on 07/10/17 at 23:51:36 Any auto parts store sells plug caps for vacuum lines, for cheap, buy two and put the spare in your tool kit,as they due tend to fail,BUT mine is on year four . |
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Title: Re: Gas leaking, reason unknown Post by EJID on 07/11/17 at 13:10:42 I had a similar gas leak on my 2005 last summer. My wife kept complaining about the gas smell when I parked it in the garage (it's lived it's 8 years that I've had it in my garage so far without a problem) but I thought it might be the o-ring gasket to the Raptor petcock. Mine tended to have gas residue at the base where the seat meets the tank. I removed and examined the Raptor, not the problem. Rode it all last summer, thinking it was primarily the gas fumes from the vent in the cap. Fast forward to this spring, I stripped the bike to repaint and when I put it back together fuel kept puking out the vent tubes. (See my post about that for more details) I ended up thoroughly cleaning the carb and replacing the needle/seat and it solved my problem. It seems my needle/seat was slightly leaking last year and ended up completely stuck this year. |
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Title: Re: Gas leaking, reason unknown Post by piedmontbuckeye on 07/12/17 at 15:39:35 3231243D313E6468500 wrote:
My local AutoZone offered a "kit" of various sizes. No individual sizes so I bought the kit for around $2.00. |
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Title: Re: Gas leaking, reason unknown Post by NitehawkCE on 07/13/17 at 10:45:04 Do not lose the washers under the two screws for the petcock. They aren't really washers. Suzuki calls them gaskets. A standard metal washer will allow fuel to leak out around the screw. Trust me. ;D |
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Title: Re: Gas leaking, reason unknown Post by whitesavage on 07/13/17 at 11:08:21 Oohh, good advice. Now my next task is to find a decent petcock and try to order it, takes some time to arrive here. I see mostly offers from the US which means I pay the same amount for shipping as I pay for the petcock itself, heh. Try to search better, there should be something nearer to me, too. |
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Title: Re: Gas leaking, reason unknown Post by justin_o_guy2 on 07/13/17 at 17:17:49 Yamaha dealership |
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Title: Re: Gas leaking, reason unknown Post by whitesavage on 07/23/17 at 06:17:15 Gas leaking reason known now: Hehe, guess I should've checked the hose better... newb mistake perhaps. It seemed fine when I checked, touched and twisted it the first time, but the second time removed the clamp fully and saw that there was a small crack beneath the clamp. My new Yamaha Raptor petcock has already arrived and well, now I have a spare petcock. But as you say that it's a faulty system anyhow, I don't mind having a spare petcock. It's just that I probably don't have to change it because of this leak immediately. Thanks for the advice! |
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Title: Re: Gas leaking, reason unknown Post by Eegore on 07/23/17 at 08:20:02 It takes about 5 minutes to change that petcock out, after you drain the tank. Personally seeing how many people have problems with the stock one I'd just change it now, or keep the raptor and a screwdriver/spare fuel canister with you at all times to avoid a fuel related issue leaving you walking the bike home. |
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Title: Re: Gas leaking, reason unknown Post by batman on 07/23/17 at 09:56:15 Or you could simply turn the stock petcock to prime , cut the vacuum hose in half and plug both ends( two golf tees or bolts ,two small wire ties )and ride home. |
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Title: Re: Gas leaking, reason unknown Post by Eegore on 07/24/17 at 05:16:24 True but my way sounds much more inconvenient. |
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Title: Re: Gas leaking, reason unknown Post by justin_o_guy2 on 07/24/17 at 07:21:40 Yeah, and we all know how we strive to make inconvenient the operative word. Just swap it out and be done or wait till you have to pull the tank to do the valves. Prepare a place to set the tank up high enough to not kink the speedometer cable. |
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Title: Re: Gas leaking, reason unknown Post by wakosama on 07/26/17 at 08:37:57 I did all that. It turned out to be a leaky seam in the gas tank welds. 'new' dented tank and it runs fine. not always the obvious. Be well, ;) |
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Title: Re: Gas leaking, reason unknown Post by justin_o_guy2 on 07/26/17 at 08:55:12 Can you fix it? |
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Title: Re: Gas leaking, reason unknown Post by ohiomoto on 07/26/17 at 08:59:45 Two words: Red Kote |
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Title: Re: Gas leaking, reason unknown Post by wakosama on 07/26/17 at 15:54:41 Oh, I fixed it, finally with a new 'dents no leaks' tank off ebay, after the problem because evident. Just saying. Had a 'battery' problem that turned out to be a starter problem that turned out to be a wiring problem, and I fixed that too... noting that the help here was more than enough to do it better than right too. this is the place for Savage answers. thanks. ;) |
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Title: Re: Gas leaking, reason unknown Post by ohiomoto on 07/26/17 at 19:26:15 More than two words: Red Kote will more than likely seal your original tank for less than you spent on that dented tank. If your leaking tank isn't dented, and you prefer it to the dented tank, then Red Kote is what you want. If you like dented tanks, that's cool too. The vintage GT185 tank I put on my bike has a few dents, some scratches and a little bit of fading. One of my coworkers is on my tushy for NOT fixing it and putting a slick hot rod paint job on. I love my tank just the way it is. It's dented, shows it's age, it's authentic to the bike I built, and doesn't leak. It's perfect! :) |
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Title: Re: Gas leaking, reason unknown Post by wakosama on 07/26/17 at 19:54:28 Thanks, The Red Kote was recommended for the cracked weld back then, but I wasn't sure it would work first time for me. my girls actually got me the tank. it was advertised as "dents no leaks". Ride-able is best now, and I'm less worried about cosmetics now too. Not the prettiest guy around anymore either. I can accept both. Maybe I could sell it: "leaks no dents". ::) be well... |
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Title: Re: Gas leaking, reason unknown Post by whitesavage on 08/27/17 at 11:45:06 Ooh, back to my previous topic... as it first seemed that only the hose was cracked and leaked, I changed only the hose. But tonight I got quite some experience - standing by the road for the very first time. At first I thought that something really bad was going on, I heard two bangs and then stopped by the road, the bike not starting again. After a while and one helpful gentleman later, the bike started and I could drive about 500 metres and the same thing occurred (ok, without the bangs, but stopping just the same). After consulting with my well-experienced friends, I checked the gas level (there was some gas, although not much) and switched to reserve - and thanks to this, I am now home. And very grateful. So I guess that yes, this is now the time to change the petcock! Or is it just a quirk of this bike that when the gas level goes rather low (but it's not out of gas), it doesn't get gas normally anymore? Maybe I'm just so much newb that I ran out of gas like a normal newb does at least once :D I do hope that all this was only gas-related because I was quite afraid of something more serious at the moment. Two other lessons: always take your phone with you! And always stop and ask whether someone needs help. Thanks a lot to the guy who stopped. |
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Title: Re: Gas leaking, reason unknown Post by whitesavage on 08/27/17 at 11:50:48 PS. Does your bike sometimes make banging noises? Sometimes, for example, when I come home and stop the bike, I hear something that sounds like someone chopping wood. Once, like one thump. And for a couple of times (not only in the last stopping case, but before, too) I have heard some bang noises when riding. Perhaps it happened when changing gears at higher speeds, but I don't know exactly. Not often. I'm just wondering whether it's something really bad or is it somehow normal. |
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Title: Re: Gas leaking, reason unknown Post by batman on 08/27/17 at 15:20:46 Whitesavage, when you "run out of gas " the carb goes lean ,the bike misfires ,and the lean mix is pushed into the hot exhaust pipe and explodes (after fire) the backfire noise you heard.then if you put the bike on the sidestand to try restarting,you shifted fuel in the tank toward the petcock which allowed enough fuel to ride another 500meters before it quit again, then you found reserve. some times if you feel the motor missing you can turn the petcock quickly to reserve before it dies .So yes the "backfire" you heard is normal and could be somewhat louder than what you hear at idle when you turn the bike off .the banging noise or thumping you hear while shifting could be the fact that your shifting to a higher gear to early and opening the throttle to wide ,that will cause a knock -knock sound until the speed increases.try raising the speeds you shift at by 5-10 mph . |
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