Bike keeps pissing itself

[M.C]

I changed the air filter, and also replaced the airbox as it had a bit of damage and (knowing it was there) was annoying me. Upon putting the tank back on the fuel pump was doing odd things and the bike wouldn't start. Eventually it did but I noticed a fuel leak that appears to be coming from the exhaust:

Not out the back but at the junctures (if that makes sense), and not out the overflow either:
https://i62.servimg.com/u/f62/15/13/82/47/under10.jpg
^ think that's coming from where the downpipes/mid-section meet (it's running along the skid thingy).

https://i62.servimg.com/u/f62/15/13/82/47/middle10.jpg
^Definitely coming out of that juncture and dripping down.

https://i62.servimg.com/u/f62/15/13/82/47/rear10.jpg
^which it spat all over the rear wheel/brake (yes the bike needs a clean ).

Any ideas? Faulty fuel pump? Only other idea I had was when I changed the airbox it came with an air temp' sensor which I left in, could that cause a problem?

[recman]

Double check the tank fuel connections.

[M.C]

[-]

[M.C]

[yen_powell]

Have you pinched the fuel pipe when you put the tank on?
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Blackmail is a nasty word........but not as nasty as phlegm!
XT1200Z and a DR350 in bits

[M.C]

[Teflon-Mike]

Follow the logic.
If it was a carbed bike.... fuel lives in the tank, comes down fuel pipe to the float bowl, is stopped by the float valve, then gets sucked from the float bowl up the jets into the inlet tract, to get burned in the cylinder.
IF the float valve stuck open, then fuel could flood the float bowl, should spill from the over-flow before it over-flows the float bowl and up the carb-jets to trickle into the cylinder, and thence down into the exhaust-pipe...
BUT suggestion is bikes fuel injected.... fuel is squirted into the inlet tract via an electric syringe..... that should be a valve to stop fuel leaking nto the inlet tract like a stuck float in a carb.... plus the fuel supply to the squirter is positively pumped, so it would only get past when the ignition is turned 'on' and pump running, or when there is pressure still in the lines shortly after ignition turned off... a-n-d there's usually an electric operated cut-off in there 'some-where' to shut fuel supply when igntion off and or a shock sensor triggered.

Oh-Kay.... the logic.... if fuel leaking 'out' the exhaust, some-how it has to be getting 'in' to the exhaust.

If the fuel is getting into the pipe, the logically it should be getting there through the cylinders, from the carburation.... and it has to be getting there in at least greater volume than its coming out in the puddles....

That would suggest that if it is getting there by that route, there must be a heck of a lot getting 'in' and that would manifest itself as serious over-fueling when running, probably to the point that the engine wouldn't run.....

Which suggests that the more likely is that the fuel ISN'T coming 'out' of the exhaust, so it never got 'in', and the exhaust s simply a low surface around the engine, where fuel getting 'on' it else where will run down.

So, I would check for split hoses, or pin-holed tank in and around as first course.

But.. not discounting possibilities before you begin; if you have a pressurized system, then when put under pressure it will be more likely to rupture, and that rupture to show as a leak when not under pressure... could be a seal in the fuel pump or the injector... not as likely but not impossible...

So check the more likely first; that it isn't fuel leaking from the exhaust, but run-off coming down the pipe, and that what you think s it leaking from a joint is merely that joint being a discontinuity in the drip-run, that makes it drip 'off' rather than trickle further.
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[Copycat73]

quote="M.C"

https://i62.servimg.com/u/f62/15/13/82/47/rear10.jpg

that looks more like coolant .. petrol has no surface tension ...
coolant does have a petro chemical type of smell ..
so could some of that leaked into or around the air box ?
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Whatever I post I have no citation and no intention of providing one..
caveat emptor

[M.C]

[MCN]

If it only pisses it's sel' when the engine is cold then it is completely normal combustion H2O (water).

It does not look like fuel as it beads too much like water.

The smell of fuel will just be soluble compounds from the fuel.
Not all the fuel can be burned so some escapes.
Emissions.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[M.C]

[MCN]

Well that 'liquid' on the deck and on the swing arm looks a little bit 'substantial' enough to be noticed as a leak from the cooling system if it is a regular occurrence.

But again, it does not look like a typical coolant 'puddle'.

I am not saying do this but glycol tastes very very very sweet even in tiny concentrations.
If someone were daft/determined enough they could taste a very tiny dab for sweetness.

(Disclaimer: Toxicity[edit]
Main article: Ethylene glycol poisoning
Ethylene glycol is moderately toxic, with an oral LDLo = 786 mg/kg for humans.[19] The major danger is due to its sweet taste, which can attract children and animals. Upon ingestion, ethylene glycol is oxidized to glycolic acid, which is, in turn, oxidized to oxalic acid, which is toxic. It and its toxic byproducts first affect the central nervous system, then the heart, and finally the kidneys. Ingestion of sufficient amounts can be fatal if untreated.[20] Several deaths are recorded annually in the U.S. alone.[21]
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[Copycat73]

coolant is usually blue or green .. but in small quantities this can be hard to see ..try dabbin it with a soft white tissue to see if any colour ...
think i would be havin another look inside and out round that airbox for loose connections and broken or bent pipes ... and any electrics that are not properly connected...
____________________
Whatever I post I have no citation and no intention of providing one..
caveat emptor

[Freddyfruitba...]

Logical thing might be for the OP to extract a small sample of coolant and petrol from their respective tanks on the bike, and then it shouldn't be too hard to work out which, if any, looks/smells/feels/tastes(?! ) the same as the leaked fluid?
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KC100->CB100N->CB250RS--------->DL650AL2->R1200RS->R1250RS

[M.C]

[Stoker]

Is the bike carb or injected?[/quote]
Fuel injected. [/quote]

[M.C]

Also forgot to mention the engine light stays on I think it has a diagnostics thingy?

[Copycat73]

[M.C]

[-]

[P.]

Just taste it, instantly know what fluid it is. Not saying drink it, but a dab on your little finger will confirm what it is.

Stock exhausts? Never had an issue with them on the Triple. Danmoto however, was like a rain collector.

[recman]

[P.]

[recman]