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Author Topic: Liquid dripping out of overflo pipes  (Read 537 times)

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Offline MildDog

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Liquid dripping out of overflo pipes
« on: March 19, 2013, 06:46:19 pm »
When my DRZ stands at night there is a little puddle of fuel on the floor in the morning, underneath the overflow pipes (they run through where the swing-arm attaches to the bike).

Ideas on where that's coming from?
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Offline WabbitKiLR

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Re: Liquid dripping out of overflo pipes
« Reply #1 on: March 19, 2013, 07:02:58 pm »
Fuel? That should be the pipes that excess oil from the crank case breather valve drains out of. The valve breathes the oily moisture into the air box and from there it is combusted again through the carbs and into the engine. If too much accumulates, it dams up and drains through the pipe down onto the ground.

I think.

But fuel? Something is up with that ???
 

Offline Torque Curve

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Re: Liquid dripping out of overflo pipes
« Reply #2 on: March 19, 2013, 07:09:30 pm »
Fuel? That should be the pipes that excess oil from the crank case breather valve drains out of. The valve breathes the oily moisture into the air box and from there it is combusted again through the carbs and into the engine. If too much accumulates, it dams up and drains through the pipe down onto the ground.

I think.

But fuel? Something is up with that ???

No the DRZ breathes through hoses from the barrel and the tappet cover into a collector box and then out towards the battery, behind the left side cover, where it makes a mess over the subframe. It does not feed back into the airbox. Are you sure its fuel under your bike? If your air filter is over-oiled this too will drip out the bottom of the airbox, onto the swing arm and from there onto the ground.
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Offline WabbitKiLR

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Re: Liquid dripping out of overflo pipes
« Reply #3 on: March 19, 2013, 07:11:40 pm »
Whoops. I was thinking of the KLR's system :-[
 

Offline Woestynhond

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Re: Liquid dripping out of overflo pipes
« Reply #4 on: March 19, 2013, 07:54:23 pm »
May be from a busted o ring on carb drainscrew?
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Offline MildDog

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Re: Liquid dripping out of overflo pipes
« Reply #5 on: March 20, 2013, 03:09:49 pm »
May be from a busted o ring on carb drainscrew?

Saw this morning my fuel cock is leaking, so need to get a refurb kit. Not sure how that's draining out the overflow pipes.
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Offline Firecoast

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Re: Liquid dripping out of overflo pipes
« Reply #6 on: March 20, 2013, 03:11:15 pm »
Possibly dirty carburetor as a result of fuel going off.
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Offline buzzlightyear

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Re: Liquid dripping out of overflo pipes
« Reply #7 on: March 20, 2013, 03:18:56 pm »
Leaking floatvalve in carb causing carb to overflow?
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Offline Woestynhond

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Re: Liquid dripping out of overflo pipes
« Reply #8 on: March 20, 2013, 03:41:47 pm »
Pleas do your self the favour of checking your oil for petrol as well!!! If gas tap leaks and carb overflows fuel can leak through carb into intake manifold and past piston rings into gas!

Happens if the float valve does'int seal properly !
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Offline sidetrack

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Re: Liquid dripping out of overflo pipes
« Reply #9 on: March 21, 2013, 11:46:58 am »
Leaking floatvalve in carb causing carb to overflow
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Offline lecap

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Re: Liquid dripping out of overflo pipes
« Reply #10 on: April 15, 2013, 09:43:32 am »
The fuel tap is the primary culprit. Should close when engine is switched off. If you have a manual tap you must always close it overnight.

The float needle valve will often leak very slightly if the tap is not closed and fill the float bowl until it overflows. Telltale signs: Poor starting (or sometimes "good" as the bike will start easily without choke where it should require choke :o) Fuel puddles. Fuel in oil.
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