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Motorcycle Forum / Country Specific / UK Group / August 2007Leaving bikes standing unused
How long does it take for fuel to go manky? I ask because my gixxer has been laid up on the optimate for the past few months due to a combination of crap weather, work commitments and spending all my spare time trying to get my recently acquired Morini running. Yesterday I got the irresistible urge to skive off work for a few hours and go for a long blat but found that the bike is running dog rough. The fuel light was on so I headed to the nearest petrol station to fill up. No different with a tank full of fresh fuel, the bike sounds like a tractor and coughs and splutters at low revs / small throttle openings. On giving it beans it seems to clear itself and hurtles forwards in the usual fashion. So, I gave the bike a good thrashing to see if it cleared, but no joy. Still splutters at low revs. What's up with it? I was thinking maybe the injectors are gummed up, but then wouldn't that cause it to run rough right through the rev range? I would have hoped it would take longer than a few months for the fuel to turn to gunge. Last time the bike was laid up for any length of time the alarm did for the battery (hence the optimate). That time, on fitting a new battery the red light stayed on with FI warning flashing (manual says the bike will run in limp mode and to get it to the nearest dealer). The dealer said the FI warning was caused by a sticking exhaust valve. This was fixed under warranty and it has been fine since. This time the battery was fully charged, the bike started first press and there are no warning lights. But the bike certainly isn't running right. Is it worth trying an injector cleaner fuel additive like redex or similar? Or is this caused by something else?  SignatureSimonM GSX-R 1000 K5 Spamtrap - change "deadspam.com" to "veryblack.co.uk" >How long does it take for fuel to go manky? It doesn't. It's a myth brought about by the deposits it can leave in carbs if it's left to evaporate, particularly multiple times, which can block up the jets etc. Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` >>How long does it take for fuel to go manky? > >It doesn't. It's a myth brought about by the deposits it can leave in >carbs if it's left to evaporate, particularly multiple times, which >can block up the jets etc. Hmmm..., having spent several hours stripping and ungumming the carbs on the Morini I would say that fuel does, eventually, go manky. However, it has to be said that the bike had been stood for years and the previous keeper hadn't even drained the float bowls. The amount of sludge had to be seen to be believed. SignatureSimonM GSX-R 1000 K5 Spamtrap - change "deadspam.com" to "veryblack.co.uk" >>How long does it take for fuel to go manky? > It doesn't. It's a myth brought about by the deposits it can leave in > carbs if it's left to evaporate, particularly multiple times, which > can block up the jets etc. No myth. Fuel does indeed go 'off' over time. The volatile fractions evaporate, and what's left is less than optimum. That said, since SimonM has filled up a nearly empty tank with fresh fuel, this isn't his problem. I'd advise him to run some quality fuel injector cleaner through the system and see how it goes. Signature'01 SV650SK1 '99 EX250-F13 '98 ZG1000-A13 OMF #7 >>>How long does it take for fuel to go manky? > [quoted text clipped - 4 lines] >No myth. Fuel does indeed go 'off' over time. The volatile fractions >evaporate, and what's left is less than optimum. Sorry, that's not true. I've checked this out with specialist chemists[1], and the fact is that at normal temperatures the various components all evaporate at around the same rate. If the float bowls have completely dried out, then clearly there may be some crap left which may bung up the system, but the fuel in the tank should be just as good as new. The myth is often 'proved' when people flush their systems and fill up with fresh, but of course this will also have the effect of cleaning out the crap, which is what I believe then makes it run better. >That said, since SimonM >has filled up a nearly empty tank with fresh fuel, this isn't his problem. >I'd advise him to run some quality fuel injector cleaner through the >system and see how it goes. Indeed. [1] Well only one, my Sister-in-law, who used to be GM at a chemical bottling plant. Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` >>>> How long does it take for fuel to go manky? >>> It doesn't. It's a myth brought about by the deposits it can leave in [quoted text clipped - 23 lines] > [1] Well only one, my Sister-in-law, who used to be GM at a chemical > bottling plant. <suspicious look> Well it definitely has a different smell to it after a while - very distinctive. </suspicious look> I don't know exactly how long the 'knacker your carbs' period is, but I have been long past it (probably by years) on a couple of bikes, as I know to my cost. I'm not sure what happens with FI systems. Signature/Simon On Jul 31, 3:49 pm, Simon Wilson <siwil...@nodamnspamn.hotmail.com> wrote: > >>>> How long does it take for fuel to go manky? I was told that petrol does not last very long at all since the chemicals they used to add to it have all been banned, this may or may not be true though.. Simon > I don't know exactly how long the 'knacker your carbs' period is, but > I have been long past it (probably by years) on a couple of bikes, as > I know to my cost. I'm not sure what happens with FI systems. For the last <fx:counts on fingers> 15 winters three different bikes, all Kawasakis, all non-FI, have been laid up in the garage with nary a glance for up to five months. Without fail, each spring, apart from charging (or replacing) the battery they have started up and run spot-on using the fuel left in the tank. I'm still of a mind that you would have to leave it for *yonks* to get it to go 'bad', if at all. SignatureChris >For the last <fx:counts on fingers> 15 winters three different bikes, >all Kawasakis, all non-FI, have been laid up in the garage with nary a [quoted text clipped - 6 lines] >I'm still of a mind that you would have to leave it for *yonks* to get >it to go 'bad', if at all. It's only an issue if you're talking about reducig it's volume by a massively noticeable amount. So if you leave a tank open for a year, you'll quite possibly be left with gunge in the bottom, but if it's sealed even as well as a normal fuel tank, it'll be years before that happens. Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` > So if you leave a tank open for a year, > you'll quite possibly be left with gunge in the bottom, but if it's > sealed even as well as a normal fuel tank, it'll be years before that > happens. Yes, indeed. SignatureK1100LT 955i 750SS CB400F CD250 CM200 SL125 GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 The bells, the bells..... > <suspicious look> > > Well it definitely has a different smell to it after a while - very > distinctive. > > </suspicious look> You won't change his mind. He *knows* he's right. Just like over that "supermotard" thing - he was wrong about that too. SignatureBear >> <suspicious look> >> [quoted text clipped - 4 lines] > >You won't change his mind. He *knows* he's right. ooooooOOOOOOooooh. Who rattled your cage? Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` > Sorry, that's not true. I've checked this out with specialist > chemists[1], and the fact is that at normal temperatures the various > components all evaporate at around the same rate. If the float bowls > have completely dried out, then clearly there may be some crap left > which may bung up the system, but the fuel in the tank should be just > as good as new. It takes a helluva long time for fuel in the tank to evaporate and go off, but trust me, it does. When I'm messing with SOBs, the one thing that makes me sigh and down tools is that distinctive varnish smell from the carbs. On bikes that have been standing for a really long time (like several years) you get it from the tank as well. SignatureK1100LT 955i 750SS CB400F CD250 CM200 SL125 GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 The bells, the bells..... >>>>How long does it take for fuel to go manky? >> [quoted text clipped - 15 lines] > with fresh, but of course this will also have the effect of cleaning > out the crap, which is what I believe then makes it run better. Well, it may be so that all fractions evaporate evenly, and not being a chemist, I'll not make any more claims about that, but I'd be quite surprised, even with my limited chemistry background, if that turned out to be the case. In any event, there is also oxidation to consider, according to the esteemed Mr. Adams: http://www.straightdope.com/columns/060825.html "The second cause of bad gas is oxidation–some of the hydrocarbons in the fuel react with oxygen to produce new compounds, almost all of them worse than what you started with. When oxidation becomes a problem, you'll know it without lab tests--the gasoline gives off a sour odor." No matter what the phyical basis behind it, it is well known that leaving a bike (or any vehicle with a vented fuel tank) stand with fuel in it for a matter of months, especially in warm weather, will result in nasty stuff forming in the carburetors or various fuel injection gubbins. I also like the rodent nest possibility, having seen plenty of evidence of critters invading my garage, it's not unusual for them to pick an airbox as a nice cosy nest to fill up with misc fluff and sunflower seed husks... Signature'01 SV650SK1 '99 EX250-F13 '98 ZG1000-A13 OMF #7 >No matter what the phyical basis behind it, it is well known i.e. a common myth. >that leaving >a bike (or any vehicle with a vented fuel tank) stand with fuel in it for >a matter of months, especially in warm weather, will result in nasty stuff >forming in the carburetors or various fuel injection gubbins. No, it needs a lot longer than 'a few months'. Only if the volume of the petrol has reduced by, say, 30% or more (guessing, but YKWIM) is it likely to become an issue. Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` > "The second cause of bad gas is oxidation–some of the hydrocarbons in > the fuel react with oxygen to produce new compounds, almost all of > them worse than what you started with. When oxidation becomes a > problem, you'll know it without lab tests--the gasoline gives off a > sour odor." You'll get very little oxidation if the tank is kept full. I think people storing bikes make the mistake of draining the tank as they think the petrol will go off. This means that any petrol left within the tank will most likely evaporate leaving a sludge, as it is subject to heating & cooling as ambient temperature varies. A full tank does not contain much oxygen but is also less likely to be affected by ambient temperature variation. The full load of petrol will also minimise corrosion from condensation. Signaturewessie at tesco dot net BMW R1150GS "Wessie is a lovely man with many wonderful qualities" TM Blaney >No matter what the phyical basis behind it, it is well known that leaving >a bike (or any vehicle with a vented fuel tank) stand with fuel in it for >a matter of months, especially in warm weather, will result in nasty stuff >forming in the carburetors or various fuel injection gubbins. My 750 turbo usually stands for 9 months of every year with fuel in the tank, without the slightest problem. I'm with Ace on this one. SignatureChamp ZX10R | GPz750turbo | GSX-R 600 racer My advice as your attorney is to buy a motorcycle To email me, neal at my domain should work. >> No matter what the phyical basis behind it, it is well known that leaving >> a bike (or any vehicle with a vented fuel tank) stand with fuel in it for [quoted text clipped - 5 lines] > > I'm with Ace on this one. I'd like to think that it *does* go off, but I have two cars in store that we go and start about once every 8 weeks or so. Neither of them show any problems with the fuel that's been in there over two years now. Yes it takes time to fill the carbs / FI system, but when they fire, away they go. On balance I would have to say that it doesn't. Actually thinking back, when I put the 116 back on the road it had been stored for about 4 years. Ran fine on that fuel as well..... SignatureCatman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3 Tyger, Tyger Burning Bright (Remove rust to reply) 116 Giulietta 3.0l Sprint 1.7 156 TS 166 V6 2.5 145 2.0 Cloverleaf Triumph Sprint ST 1050: It's blue, see. www.cuore-sportivo.co.uk > I have two cars in store > that we go and start about once every 8 weeks or so. Why, out of interest? It's a common thing for people storing vehicles for long periods of time to start them every now and then, but I'm dubious as to the benefit. To my mind, unless you're actually taking it for a decent thrash, and building-up enough heat to burn-off any deposits in the system and give it a good flush-through, then all you're really doing is chucking a load more fuel into the cold pipes / carbs etc., which will leave even more deposits. OK, you'll spread some oil around the system, which I suppose could stop the engine seizing-up when restarted, but surely after a week or two, anything that was going to have dried-up will already have done so? So is there a scientific reason for doing it? SignatureZX6R F2 - The Gravelseeker BOTAFOT #121, BBB #2 > > I have two cars in store > > that we go and start about once every 8 weeks or so. [quoted text clipped - 6 lines] > you're really doing is chucking a load more fuel into the cold pipes > / carbs etc., which will leave even more deposits. And plenty of condensation in the exhaust, don't forget that. > OK, you'll spread some oil around the system, which I suppose could > stop the engine seizing-up when restarted, but surely after a week or > two, anything that was going to have dried-up will already have done > so? I'm actually rather suspicious of cars (and bikes) that have been sitting idle and started regularly - IME it doesn't do them any good. Cranking it from time to time, OK (to circulate some oil) but not starting it up. I used to have a Rover P6 that was very low mileage and that had been run regularly - a lot of the things that needed fixing were from the car standing around. > So is there a scientific reason for doing it? None I'm aware of. SignatureMorini Corsaro 125 | CB450K4 | XL250 Motosport x2 | 900SSD Triumph T-Bird chop | K1100LT BOTAFOF #33 TWA#10 The UKRM FAQ: http://www.ukrm.net/faq/index.html "Je profite du paysage" - Joe Bar > > Why, out of interest? It's a common thing for people storing vehicles > > for long periods of time to start them every now and then, but I'm [quoted text clipped - 5 lines] > > And plenty of condensation in the exhaust, don't forget that. I start the 400 Four a few times over winter, but I set the tickover to around 2k revs and let it run for at least 20 minutes, in order to get everything good and hot. That avoids the condensation problem. The real reason is to feed fresh fuel into the carbs from the tank. Before I shut it down, I turn off the fuel and run it till the carbs are utterly dry. SignatureK1100LT 955i 750SS CB400F CD250 CM200 SL125 GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 The bells, the bells..... > I start the 400 Four a few times over winter, but I set the tickover > to around 2k revs and let it run for at least 20 minutes, in order to > get everything good and hot. I do that occasionlly too. A couple of years back, I was running the bike and one of my neigbours[1] came round to complain that the fumes were going into her back garden. I pointed directly across the road, to where a double decker bus was sat at the bus-stop idling away and asked if she wanted me to get all the buses to switch of there engines too. Some people have got nothing better to do than have a good moan. [1] Retirement age woman. SignatureChris >>> I have two cars in store >>> that we go and start about once every 8 weeks or so. [quoted text clipped - 7 lines] > > And plenty of condensation in the exhaust, don't forget that. Get them right up to temp. The end cans get well dried out (at lest I *think* they do) > >> OK, you'll spread some oil around the system, which I suppose could [quoted text clipped - 6 lines] > Cranking it from time to time, OK (to circulate some oil) but not > starting it up. You may well have a point there. Neither of them are likely to ever come up for sale a they are the restoration jobs, so I'm not worried about anyone being suspicious. > I used to have a Rover P6 that was very low mileage and that had been > run regularly - a lot of the things that needed fixing were from the [quoted text clipped - 3 lines] > > None I'm aware of. I bow to your greater expertise, but I still like the sound :) SignatureCatman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3 Tyger, Tyger Burning Bright (Remove rust to reply) 116 Giulietta 3.0l Sprint 1.7 156 TS 166 V6 2.5 145 2.0 Cloverleaf Triumph Sprint ST 1050: It's blue, see. www.cuore-sportivo.co.uk >> I have two cars in store >> that we go and start about once every 8 weeks or so. [quoted text clipped - 6 lines] > load more fuel into the cold pipes / carbs etc., which will leave even more > deposits. We get them up to full temperature. > OK, you'll spread some oil around the system, which I suppose could stop the > engine seizing-up when restarted, but surely after a week or two, anything > that was going to have dried-up will already have done so? > > So is there a scientific reason for doing it? Probably not one that I could give soundly. I don't think you'll find too much oil actually dries up off the engine parts, but it can go a bit manky IME. I just like to keep my non-scientific demons at bay that the oils is being spread about a bit. Maybe it does nothing, but I also like to check they've not been nicked, burned out and I love the sound (Alfa engines in a large, echoey barn) ;) SignatureCatman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3 Tyger, Tyger Burning Bright (Remove rust to reply) 116 Giulietta 3.0l Sprint 1.7 156 TS 166 V6 2.5 145 2.0 Cloverleaf Triumph Sprint ST 1050: It's blue, see. www.cuore-sportivo.co.uk >I also like the rodent nest possibility, having seen plenty of evidence of >critters invading my garage, it's not unusual for them to pick an airbox >as a nice cosy nest to fill up with misc fluff and sunflower seed husks... Checked this last night. No foreign objects in the airbox though the filter element was fairly clogged with dust. I gave it a blast with compressed air and bunged it back in. Came back inside for a beer and read the service manual, it says "Caution: Do not blow the air cleaner element with compressed air". Oh, OK then. Winter appears to have set in again here, but if it dries up later I'll go for a run to see what's what. SignatureSimonM GSX-R 1000 K5 Spamtrap - change "deadspam.com" to "veryblack.co.uk" > >> On Tue, 31 Jul 2007 11:58:33 GMT, SimonM <zx-9r@deadspam.com> > wrote: [quoted text clipped - 14 lines] > which may bung up the system, but the fuel in the tank should be just > as good as new. That may be true in theory (assuming your sister-in-law isn't a mong), but it absolutely definitely does go off. I've got a spare tank for the Fantic (big capacity hand-made alloy job) which sat with petrol in it for a few years. I dug it out last year to see if it would fit on the modified Tiger, & the 'petrol' that came out of it was a dark brownish-yellow colour, & much thicker than fresh petrol. It also smelt nothing like petrol. SignatureKrusty www.MuddyStuff.co.uk Off-Road Classifieds '02 MV Senna '03 Tigtona 955i '96 Tiger '79 Fantic Hiro 250 We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Ace <seesig@virgin.net> saying something like: >>How long does it take for fuel to go manky? > >It doesn't. It's a myth Not a myth at all- the more volatile bits will bugger off and leave the shiter components behind if left for long enough. Been happening to petrol for ages and the newer stuff doesn't seem much better for this particular shortcoming. SignatureDave GS850x2 XS650 SE6a Teach a man to fish and he and his pikey mates will have the river cleaned out in a day. On 31 Jul, 19:03, Grimly Curmudgeon <grimly4REM...@REMOVEgmail.com> wrote: > We were somewhere around Barstow, on the edge of the desert, when the > drugs began to take hold. I remember Ace <see...@virgin.net> saying [quoted text clipped - 8 lines] > petrol for ages and the newer stuff doesn't seem much better for this > particular shortcoming. I've got a strange one, and here is a tale too. Years ago I rebuilt a Lotus Twin Cam that was completely wrecked due to lack of use and being outside... New everything, rebore, pistons ... I think the head was cracked due to frost and was welded. Finally - let's fire it up. Nothing. Had been suspicious of the fuel so changed that first, no use, no go. After some hours of headscratching changed the plugs for another new set. Fixed. Presume that the old fuel had wrecked the new plugs. They looked OK, brand new and completely unused in fact. No clue as to any possible mechanism. I seem to recall that the fuel seemed a lot darker than would be expected. >We were somewhere around Barstow, on the edge of the desert, when the >drugs began to take hold. I remember Ace <seesig@virgin.net> saying [quoted text clipped - 8 lines] >petrol for ages and the newer stuff doesn't seem much better for this >particular shortcoming. Read the rest of the thread. Or in short: No, it doesn't. It's a myth. Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Ace <seesig@virgin.net> saying something like: >>Not a myth at all- the more volatile bits will bugger off and leave the >>shiter components behind if left for long enough. Been happening to >>petrol for ages and the newer stuff doesn't seem much better for this >>particular shortcoming. > >Read the rest of the thread. Or in short: No, it doesn't. It's a myth. I'll shout that at my petrol next time it goes off then. "YOU MYTHICAL c.nt!" SignatureDave GS850x2 XS650 SE6a Teach a man to fish and he and his pikey mates will have the river cleaned out in a day. >We were somewhere around Barstow, on the edge of the desert, when the >drugs began to take hold. I remember Ace <seesig@virgin.net> saying [quoted text clipped - 8 lines] > >I'll shout that at my petrol next time it goes off then. While you're about it you can send a sample for analysis to try and explain exactly what's "gone off" about it. Thing is, petrol is a pretty homogenous mix, so this idea that there are large parts of it significantly more volatile than others has no grounding in chemistry. Signature_______ .'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom) \`\ | /`/ DS#8 BOTAFOT#3 SbS#2 UKRMMA#13 DFV#8 SKA#2 IBB#10 `\\ | //' `\|/` ` We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Ace <seesig@virgin.net> saying something like: >>>Read the rest of the thread. Or in short: No, it doesn't. It's a myth. >> [quoted text clipped - 4 lines] >pretty homogenous mix, so this idea that there are large parts of it >significantly more volatile than others has no grounding in chemistry. In my experience (and those of plenty others) it definitely happens. Some engines are far more tolerant of fuel quality and would probably start on barbeque sauce, but some will just not start on fuel that's more than a few months old. Ergo; a change has taken place. Whether it's caused by volatiles leaving or another chemical change is immaterial - it's happened, and as I said, modern fuel seems to be just as prone to it if not more so than the older stuff. This chemical s-inlaw; she a fuel technologist? SignatureDave GS850x2 XS650 SE6a Teach a man to fish and he and his pikey mates will have the river cleaned out in a day. We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Ace <seesig@virgin.net> saying something like: >>Not a myth at all- the more volatile bits will bugger off and leave the >>shiter components behind if left for long enough. Been happening to >>petrol for ages and the newer stuff doesn't seem much better for this >>particular shortcoming. > >Read the rest of the thread. Or in short: No, it doesn't. It's a myth. I'll shout that at my petrol next time it goes off then. "YOU MYTHICAL c.nt!" SignatureDave GS850x2 XS650 SE6a Teach a man to fish and he and his pikey mates will have the river cleaned out in a day. > I'll shout that at my petrol next time it goes off then. > > "YOU MYTHICAL c.nt!" shout it several times to make sure. Signaturedog sl1000 two#5 >> I'll shout that at my petrol next time it goes off then. >> >> "YOU MYTHICAL c.nt!" > > shout it several times to make sure. Twice should be sufficient. SignatureCatman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3 Tyger, Tyger Burning Bright (Remove rust to reply) 116 Giulietta 3.0l Sprint 1.7 156 TS 166 V6 2.5 145 2.0 Cloverleaf Triumph Sprint ST 1050: It's blue, see. www.cuore-sportivo.co.uk > >How long does it take for fuel to go manky? > > It doesn't. It's a myth brought about by the deposits it can leave in > carbs if it's left to evaporate, particularly multiple times, which > can block up the jets etc. Oh Christ, not this one again ... Fuel does go off. It tends to do so in more open spaces, specifically car tanks, although I've twice seen it happen to bikes that were left 1/4 filled. SignatureBear > Is it worth trying an injector cleaner fuel additive like redex or > similar? Or is this caused by something else? I'd check the air filter first. There might be a spider's web, bird nest etc that restricts air flow until you get a bit of pressure built up from your forward momentum. Signaturewessie at tesco dot net BMW R1150GS "Wessie is a lovely man with many wonderful qualities" TM Blaney >> Is it worth trying an injector cleaner fuel additive like redex or >> similar? Or is this caused by something else? > >I'd check the air filter first. There might be a spider's web, bird nest >etc that restricts air flow until you get a bit of pressure built up from >your forward momentum. Good suggestion, ta. I'll send the Mrs in to check. Just in case the spider is still in residence. SignatureSimonM GSX-R 1000 K5 Spamtrap - change "deadspam.com" to "veryblack.co.uk" > How long does it take for fuel to go manky? As Ace says, the problem isn't so much it going manky (though if left long enough, the volatiles do evaporate, so he isn't quite right) as fuel evaporating completely in carbs or injectors and leaving a gummy deposit. How long this takes is really a climate issue. I've left fuel for two or three months in the UK, with no problems. Howedver, in a hot climate, that's long enough for evaporation to occur and residues to form. It is probably the most common bike problem of the era. SignatureK1100LT 955i 750SS CB400F CD250 CM200 SL125 GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 The bells, the bells..... |
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