2002 sv 650 fuel tank problem - Page 4 - SV650.org

yorkie_chris · 01-06-08, 09:25 PM

Water will sit in the filler cap and go in the tank as soon as you open it or go down the filler neck by seeping past the seal on the moving part of the cap.

Hope the drain screws on your carbs work

01-06-08, 09:29 PM

thats why i was going to put a bead of silicon around the filler cap before i put it back on to stop any water getting under it.

will that not be suffice?

yorkie_chris · 01-06-08, 09:32 PM

No because the cap and the ring under it aren't a perfect seal. Why do you think people get water issues when the drain gets blocked?

A capful of meths in the fuel every now and again might sort it when it starts to misbehave. (meths will mix with water and burn off)

01-06-08, 09:39 PM

ahh right ok...

well im off back to uni tomorrow so wont be doing anything for a couple of weeks now till exams are finished!

i will try feeding some hose through first like you suggested but if i cant get it through then blocking it may be my only solution untill i can afford a new tank!

cheers for your help!

will let you no how it goes when i tackle it in a few weeks!

yorkie_chris · 02-06-08, 01:10 PM

Yeah, then again might be fine. A friend of mine had a bandit with a knackered fuel cap. Half a cup of meths per tank allowed it to carry on running

yorkie_chris · 03-06-08, 09:24 PM

http://forums.sv650.org/showthread.p...94#post1528894

See that thread for what happens when the vent tubes blocked...

Sid Squid · 04-06-08, 07:07 AM

Sorry to be negative, but you need another tank.

Having seen this problem several times I know from trying everything suggested here and far more that short of opening the tank up, (that is; cutting the bottom out of it, replacing the tube and welding it back up), you'll never fix it, and you can't just block the drain - it's there for a good reason.

This is a well trodden path, look here for some previous posts, and those are just mine - plenty on this subject on this forum.

04-06-08, 09:04 AM

the good reason being to drain away the water? (correct me if I'm wrong)

so surly if i stop that good reason being there (IE stop water getting under the filler cap)

then the drain is no longer needed?

OR...

as Chris has suggested putting a new pipe inside the old one. if i can get that pipe in why wouldn't it work?

I'm not disregarding what you are saying you may be correct that there is no 'fix' I'm just trying to find a solution before having to replace the tank.

any help / input is welcomed.

dirtydog · 04-06-08, 10:02 AM

I don't think it's possible to make the petrol cap completely water tight surely if you did it would cause a vacuum in the tank?

I would trust the Squid with what he's saying as he does know his stuff

yorkie_chris · 04-06-08, 10:04 AM

Quote:

Originally Posted by dirtydog

I don't think it's possible to make the petrol cap completely water tight surely if you did it would cause a vacuum in the tank?

I would trust the Squid with what he's saying as he does know his stuff

Yup I would agree. Don't see why you can't run a tube inside the original drain though. What problems did you run into oh squidly one?

01-06-08, 09:25 PM	#31
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: 2002 sv 650 fuel tank issues Water will sit in the filler cap and go in the tank as soon as you open it or go down the filler neck by seeping past the seal on the moving part of the cap. Hope the drain screws on your carbs work __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

01-06-08, 09:29 PM	#32
Stevetmanchester Guest Posts: n/a	Re: 2002 sv 650 fuel tank issues thats why i was going to put a bead of silicon around the filler cap before i put it back on to stop any water getting under it. will that not be suffice?

01-06-08, 09:32 PM	#33
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: 2002 sv 650 fuel tank issues No because the cap and the ring under it aren't a perfect seal. Why do you think people get water issues when the drain gets blocked? A capful of meths in the fuel every now and again might sort it when it starts to misbehave. (meths will mix with water and burn off) __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

01-06-08, 09:39 PM	#34
Stevetmanchester Guest Posts: n/a	Re: 2002 sv 650 fuel tank issues ahh right ok... well im off back to uni tomorrow so wont be doing anything for a couple of weeks now till exams are finished! i will try feeding some hose through first like you suggested but if i cant get it through then blocking it may be my only solution untill i can afford a new tank! cheers for your help! will let you no how it goes when i tackle it in a few weeks!

02-06-08, 01:10 PM	#35
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: 2002 sv 650 fuel tank issues Yeah, then again might be fine. A friend of mine had a bandit with a knackered fuel cap. Half a cup of meths per tank allowed it to carry on running __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

03-06-08, 09:24 PM	#36
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: 2002 sv 650 fuel tank issues http://forums.sv650.org/showthread.p...94#post1528894 See that thread for what happens when the vent tubes blocked... __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

04-06-08, 07:07 AM	#37
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: 2002 sv 650 fuel tank problem Sorry to be negative, but you need another tank. Having seen this problem several times I know from trying everything suggested here and far more that short of opening the tank up, (that is; cutting the bottom out of it, replacing the tube and welding it back up), you'll never fix it, and you can't just block the drain - it's there for a good reason. This is a well trodden path, look here for some previous posts, and those are just mine - plenty on this subject on this forum. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

04-06-08, 09:04 AM	#38
Stevetmanchester Guest Posts: n/a	Re: 2002 sv 650 fuel tank problem the good reason being to drain away the water? (correct me if I'm wrong) so surly if i stop that good reason being there (IE stop water getting under the filler cap) then the drain is no longer needed? OR... as Chris has suggested putting a new pipe inside the old one. if i can get that pipe in why wouldn't it work? I'm not disregarding what you are saying you may be correct that there is no 'fix' I'm just trying to find a solution before having to replace the tank. any help / input is welcomed.

04-06-08, 10:02 AM	#39
dirtydog Knob faced knobster Mega Poster Join Date: Jan 2005 Location: Haslemere Posts: 5,422	Re: 2002 sv 650 fuel tank problem I don't think it's possible to make the petrol cap completely water tight surely if you did it would cause a vacuum in the tank? I would trust the Squid with what he's saying as he does know his stuff __________________ 2011 Speed Triple 1050

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