Fuel injected bike momentarily leaking fuel, cause?

Discussions of all things with motors, wheels, wings and ?????
Post Reply
User avatar
Orlando Paulitician
Life Member
Life Member
Posts: 4272
Joined: Sat Dec 08, 2007 6:17 pm
Location: Seminole County, South Jersey

Fuel injected bike momentarily leaking fuel, cause?

Post by Orlando Paulitician » Sat Aug 06, 2016 7:17 pm

'04 SV650s (electronic fuel injected, Not Carb'ed)

I've been trying to login to SVRIDER.com but can't remember my account info, nor the email account info it's registered under. So, figured I'd come here.

Cliffs:

Let my bike sit for 3 or 4 months.

I went to start it up to make sure everything was running fine. Lights turn on, dash turns on, pump turns on.

I go to start, click. I do this 4 or 5 times until it actually starts.

Plugs weren't firing because of a loose battery connection, which I fix by tightening it.

I look down, and there's a big wet spot about the size of a plate that covers the ground. Bike leaked gas, and continued to do so for about 30 seconds, gradually decreasing in flow to nothing.

Road the bike for about a minute, it stopped leaking.

Did it leak about I flooded the engine or some other component?
Nathan Lewis' testimony before congress wrote: According to a study of 775 floating currencies...the average life expectancy of a floating fiat currency was found to be 27 years.
Ron Paul's Farewell Address wrote:Real patriotism is the willingness to challenge the government when it's wrong,

TeeJay
Executive Member
Executive Member
Posts: 782
Joined: Mon Oct 24, 2011 8:31 pm
Location: Volusia/Seminole County

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by TeeJay » Sat Aug 06, 2016 8:51 pm

Possibly flooded it, but im not sure where the excess fuel would have come from on the motor. Does it use a smaller tank for the high pressure fuel pump? Those still have a float/needle in them to control the fuel level. Had mine screw up on my boat(4 stroke suzuki, EFI). It ran great but at lower rpm it couldnt use all the fuel being pumped to the high pressure fuel pump so it was overflowing and running out a drain. Left a nice sheen on the water behind me. Since you cranked it so much, the low pressure pump(if it has one, might just be gravity fed) might have brought in too much fuel.

User avatar
czharry
Life Member
Life Member
Posts: 7782
Joined: Tue Sep 23, 2003 2:16 pm
Location: Homestead

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by czharry » Sat Aug 06, 2016 9:08 pm

Be nice if you knew where it was leaking from, but that would require removing some side covers, probably. That would be the first thing I did.
Barring that, an O-ring probably shrunk up from the bike just sitting. Sometimes after a couple of runs, the O-ring will seal again.
If not, than you will need to replace it and torque to proper specs.
Sometimes it's fiber flat washers that dry out and crack. These non-metallic washers are not affected by the fuel. My Brit car fuel system abounds with them.
.
There's a storm coming.

User avatar
Orlando Paulitician
Life Member
Life Member
Posts: 4272
Joined: Sat Dec 08, 2007 6:17 pm
Location: Seminole County, South Jersey

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by Orlando Paulitician » Sun Aug 07, 2016 12:12 am

My bike only has half fairings basically covering the upper part of the frame.

As for finding the source, the leak was already half way done before I realized there was one. But what I could discern:

Image

(upper black circle is roughly where the gas tank is, and the front/right cylinder is about 50% visible, on the lower half/right most side)

At the part of the lower circle, I could see the gas leaking down and dripping, but that wasn't the source, that's just where I could see the ending point of the flow, before it stopped leaking.

I'll try starting it again tomorrow to see if it's permanently gone. Based on that visualization, if I had to guess, that junction between the gas tank and the top of the right cylinder.
Nathan Lewis' testimony before congress wrote: According to a study of 775 floating currencies...the average life expectancy of a floating fiat currency was found to be 27 years.
Ron Paul's Farewell Address wrote:Real patriotism is the willingness to challenge the government when it's wrong,

User avatar
czharry
Life Member
Life Member
Posts: 7782
Joined: Tue Sep 23, 2003 2:16 pm
Location: Homestead

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by czharry » Sun Aug 07, 2016 11:33 am

If it does leak, it might be the tank-to-fuel pump line. Dried, cracked, loose, ........
Or, it might be on the pressurized line of the fuel pump.
Adding fuel injection just adds to the complexity of the system.

On British cars, older Lotus' in particular, plastic fuel line fittings would crack causing fires. Just thought I'd throw in the 'plastic fittings' thing.
.
There's a storm coming.

g.willikers
Life Member
Life Member
Posts: 6196
Joined: Sat Dec 01, 2007 12:30 pm
Location: Sarasota

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by g.willikers » Mon Aug 08, 2016 1:09 pm

Makes you want a '56 BSA instead, doesn't it?
http://svmanuals.net.au/
"Don't take life so serious, son, it ain't nohow permanent."

P5 guy
Life Member
Life Member
Posts: 4680
Joined: Wed Dec 03, 2003 10:36 pm
Location: Tampa Bay Area

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by P5 guy » Tue Aug 09, 2016 6:34 am

g.willikers wrote:Makes you want a '56 BSA instead, doesn't it?
http://svmanuals.net.au/
With Amal carburetors no thanks.
I AM THE GUN LOBBY AND I VOTE!

User avatar
czharry
Life Member
Life Member
Posts: 7782
Joined: Tue Sep 23, 2003 2:16 pm
Location: Homestead

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by czharry » Tue Aug 09, 2016 1:15 pm

P5 guy wrote:
g.willikers wrote:Makes you want a '56 BSA instead, doesn't it?
http://svmanuals.net.au/
With Amal carburetors no thanks.
Ah yes, empties it's oil and fuel dribbles into a puddle along with the oil.
Case sealing; something that eluded Brit bikes for many years.
The dreams of Triumph, AJS and Norton and others come to mind.
.
There's a storm coming.

P5 guy
Life Member
Life Member
Posts: 4680
Joined: Wed Dec 03, 2003 10:36 pm
Location: Tampa Bay Area

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by P5 guy » Wed Aug 10, 2016 7:32 am

czharry wrote:
P5 guy wrote:
g.willikers wrote:Makes you want a '56 BSA instead, doesn't it?
http://svmanuals.net.au/
With Amal carburetors no thanks.
Ah yes, empties it's oil and fuel dribbles into a puddle along with the oil.
Case sealing; something that eluded Brit bikes for many years.
The dreams of Triumph, AJS and Norton and others come to mind.
Lucas electronics [smilie=042.gif]
I AM THE GUN LOBBY AND I VOTE!

User avatar
Orlando Paulitician
Life Member
Life Member
Posts: 4272
Joined: Sat Dec 08, 2007 6:17 pm
Location: Seminole County, South Jersey

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by Orlando Paulitician » Wed Aug 10, 2016 3:24 pm

Started it up and no leaks, rode it to a local restaurant and back no problems.

So, either or any combination of:

-I flooded something due to the loose battery wire connection not firing the plugs and priming the pump 5 times,
-a dried up seal that resealed itself

Thanks for the input guys.

:ber
Nathan Lewis' testimony before congress wrote: According to a study of 775 floating currencies...the average life expectancy of a floating fiat currency was found to be 27 years.
Ron Paul's Farewell Address wrote:Real patriotism is the willingness to challenge the government when it's wrong,

User avatar
BIG JOE
Senior Member
Senior Member
Posts: 311
Joined: Sun Jan 06, 2013 12:06 pm
Location: Ft Lauderdale, Fl

Re: Fuel injected bike momentarily leaking fuel, cause?

Post by BIG JOE » Fri Aug 12, 2016 6:43 pm

Maybe a Vincent Black Shadow!
BIG JOE
Ft Lauderdale, Fl

Post Reply