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Discussion Starter · #1 ·
I recently pulled my gas tank and I used Devi's instructions from this site. Since the pull everytime I fill up my tank I don't have the suction from the gas cap as I used to, I don't know if any of you experienced this but with mine it was like a seal was being broken everytime I opened my tank up. Should I be worried that I no longer have that pressure or am I just being paranoid?
 

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you should be glad there is no more suction. one of the vent / overflow tubes on your tank has a check valve on it. if it put on wrong from the factory you get the vacuum effect. as you use gas it is not being replaced by air so when you open the cap air rushes in. you don't want that. :afro:
 

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Discussion Starter · #4 ·
Oh wow, I've been gettin' the suction noise since I got the bike so I didn't even know what the hell it was supposed to sound like, geez I guess I Mr. Maggoo'd my way outta trouble ;D
 

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Mr. Magoo'd?

I like it. ;D Does that mean the instructions are Magoo-proof?

Yep, the factory regularly puts the drain and air tubes on the tank WRONG. And the tank SUX like a moderator when you open it. This is a bad thing.

Bad cases will damage the tank.
 

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ThePope said:
Oh wow, I've been gettin' the suction noise since I got the bike so I didn't even know what the hell it was supposed to sound like, geez I guess I Mr. Maggoo'd my way outta trouble ;D
You should be glad that the bike gods were looking favourably upon you, Pope. I had such a bad vacume in my tank that it ended up cracking a bunch of the paint on the tank (fuggin' plastic tanks!!!). Like you, at the time I didn't know if it was supposed to do that. You caught it just in time, before the heat of summer. That's when mine did the worst damage!
 

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+1 on tank damage.
I follow ducati.net, and there was a rash of collapsed tanks when the weather changed around thanksgiving. It seems the disc valves on Ducatis get stuck, and if you've got a nearly empty tank, and the temperature drops a fair bit overnight, these boys were finding collapsed tanks on their precious Ducs!
 

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hey everyone... new here. 2006 s3 .. stock except fly screen.

i have the same suction deal on mine. i only have 210 miles and the
engine light has been coming on occasionally and it won't idle worth
a piss during those times.. ya think the tank pressure could be part
of the problem?

one more thing.. are there lots of problems with these bikes.
i am a little nervous because of the engine light and i just got over
a scare about an oil leak.. turned out it was that cosmolene stuff..
 

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Honestly, there are few issues with these bikes compared to Jap bikes. We just make a BIG deal out of the problems we do have.

And help each other out when we can.
 

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A friend of mine had a blow-up doll he couldn't take anywhere because she would not close her mouth-she sucked like a Triumph tank?
 

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Mine sux a bit.....like the MODS.....but I never have had a problem yet..... :-\
 

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i have the same suction deal on mine. i only have 210 miles and the
engine light has been coming on occasionally and it won't idle worth
a piss during those times.. ya think the tank pressure could be part
of the problem?
Yeah, its a good chance that the engine light and misconnected vent line are related.

If you want to take it to the dealer, fine. If you want to find out for yourself, all you need are a couple of allen wrenches, an 8mm socket, and a 10mm.

1) Remove the seat.
2) remove the two short allen screws, one on each side of the tank, holding the side body panels to the tank.
3) loosen the allen that holds the front of the tank to the frame. You don't have to take it all the way out - just very loose.
4) using the 8 and 10 mm, loosen and remove the bolt that holds down the back of the tank.
5) lift the rear of the tank up about 6"(remember, you've got that front allen holding the front of the tank) and look underneath.
6) you'll see the bottom plate of the tank with the fuel line and fuel pump connection in the center, two brass fittings to the left of this plate, each with a rubber hose pressed on.
7) these are the fuel tank overflow and vent fittings. make sure the one on the left (farthest from the plate) has the hose with the disc valve in it (about 10" down the hose) and the other fitting has the plain hose. If this is NOT the case, this is the source of your sucking problem, and probably the light.

Both lines just run down the side of the engine with the coolant overflow to drain on the street.

Reverse to reassemble.

Service manual does not show which line is which, only to mark them for proper reattachment.

As to other issues, the 1050 Speed Triple had a few problems in its first year, mainly with brake components giving a 'mushy' feel to the brakes. '06-on have braided steel brake lines and teflon-coated pistons, and the issue seems to have gone away.

My own bike has had NO issues and has gone about 7500 trouble-free miles.

I did bring my bike in for the 6000 mile service, and got the sucking gas tank when I got it back. I just reversed the lines - problem gone.
 
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BillT said:
As to other issues, the 1050 Speed Triple had a few problems in its first year, mainly with brake components giving a 'mushy' feel to the brakes. '06-on have braided steel brake lines and teflon-coated pistons, and the issue seems to have gone away.
Are you saying the '05 model didn't have braided lines? My '02 even had braided lines but they did seem to change back and forth between a black and a clear coating over the braid. Maybe this is what's happened again?

Phil
 

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Hey Phil....you are right. The 05 has had braided lines from the beginning....the problem was entirely with the brake pistons, and they have been upgraded to coated pistons (not sure that its tefloncoating though) since somewhere in the 2006 model run.
 

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thanks for the info BillT. i hope my luck is as good as yours. i totally love
the bike. there may be better looking bikes out there, but i haven't seen them. especially coming straight from factory...
 

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OK,
Mine only did the suck thing once over the past 6 months I have owned it. Now tonight, on my ride home I stopped for gas..( my fuel light came on ), and the tank sucked harder than Jenna Jameson. Tomorrow, I'm bring the bike to the dealer for a re tune and warranty (oil leak) work, and now this. I know the lines are not flipped ( I checked ), so what do I tell the dealer?
 

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APtech77 - It sounds like your tip-over valve on the vent line has failed. It happens. You dealer will likely just remove it.
 
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