vent? connection at rear of tank - 990

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No37
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vent? connection at rear of tank - 990

Postby No37 » Mon Apr 09, 2018 4:11 am

Hey legends,

I took the tank off my '07 990 to do a few things about two months ago.
I have just put the tank back on today and I cannot remember what the connection at the rear of the tank is for.
It looks similar to the vent hose connection at the front of the tank.
My workshop manual doesn't mention what it is.

Any ideas???

P.S. I know, I know, take more photos of disassembly hahaha :lol:

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Adrock990r
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Re: vent? connection at rear of tank - 990

Postby Adrock990r » Mon Apr 09, 2018 10:37 am

Mine just has the elbow piece, no hose attached . Front gets connected to the vent hose as per yours.
Last edited by Adrock990r on Mon Apr 09, 2018 2:48 pm, edited 2 times in total.

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Sarasota_Steve
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Re: vent? connection at rear of tank - 990

Postby Sarasota_Steve » Mon Apr 09, 2018 12:41 pm

I have a fuel grade hose connected to the elbow, that is zip tied to the frame and slash cut below the engine. I replaced mine that was kinked since I was seeing a little puddle of fuel below the discharge hose. I'd rather have a puddle of fuel below the bike than dripping somewhere onto the engine or headers.
It is a bit of a pain in the ass to reinstall it when you take the tank off, but that's what we do as owners of KTM's.
Ride Hard,
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Sarasota_Steve
18 1290 SDR
09 Aprilia Sportcity
04 SV650

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Adrock990r
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Re: vent? connection at rear of tank - 990

Postby Adrock990r » Mon Apr 09, 2018 2:47 pm

Sarasota_Steve wrote:I have a fuel grade hose connected to the elbow, that is zip tied to the frame and slash cut below the engine. I replaced mine that was kinked since I was seeing a little puddle of fuel below the discharge hose. I'd rather have a puddle of fuel below the bike than dripping somewhere onto the engine or headers.
It is a bit of a pain in the ass to reinstall it when you take the tank off, but that's what we do as owners of KTM's.


Just got enthusiastic to do the same as you now! Mine has never had a rear hose attached nor has it ever shown any leakage but for the sake of a 5 minute job vs what could be hey...

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Sarasota_Steve
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Re: vent? connection at rear of tank - 990

Postby Sarasota_Steve » Mon Apr 09, 2018 5:09 pm

Adrock990r wrote:
Sarasota_Steve wrote:I have a fuel grade hose connected to the elbow, that is zip tied to the frame and slash cut below the engine. I replaced mine that was kinked since I was seeing a little puddle of fuel below the discharge hose. I'd rather have a puddle of fuel below the bike than dripping somewhere onto the engine or headers.
It is a bit of a pain in the ass to reinstall it when you take the tank off, but that's what we do as owners of KTM's.


Just got enthusiastic to do the same as you now! Mine has never had a rear hose attached nor has it ever shown any leakage but for the sake of a 5 minute job vs what could be hey...


Image

I wanted to show you the slash cut to avoid sucking vapors/liquid due to the Venturi effect and the spot on the garage floor under the vent hose from the previous leak.
Ride Hard,
------------------
Sarasota_Steve
18 1290 SDR
09 Aprilia Sportcity
04 SV650

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No37
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Re: vent? connection at rear of tank - 990

Postby No37 » Tue Apr 10, 2018 12:14 am

With some more thought, I think it might be for a canister (which my Australian bike doesn’t have).

I’m just gonna blank it.

Thanks guys!

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No37
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Re: vent? connection at rear of tank - 990

Postby No37 » Tue Apr 10, 2018 12:16 am

Adrock990r wrote:Mine just has the elbow piece, no hose attached . Front gets connected to the vent hose as per yours.


Yeah mine looks like that. I can’t remember actually removing any hose.

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nampus
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Re: vent? connection at rear of tank - 990

Postby nampus » Tue Apr 10, 2018 6:10 pm

I'm not 100% sure, but isn't this the drain for water from the fuel cap.
If you lift the tab covering the lock there is a tiny hole, which connects to the raised bit under the fuel cap, and that exits in the elbow on the back of the tank.

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No. 47
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Re: vent? connection at rear of tank - 990

Postby No. 47 » Tue Apr 10, 2018 6:36 pm

No37 wrote:With some more thought, I think it might be for a canister (which my Australian bike doesn’t have).

I’m just gonna blank it.

Thanks guys!


Don’t blank it off.......eg viewtopic.php?f=5&t=25127&p=328063&hilit=Rear+tank+vent#p328063
'08 ex-Battle race KTM Superduke 990 R No.47
'08 OE KTM Superduke 990 R
'01 Ducati 996S

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No37
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Re: vent? connection at rear of tank - 990

Postby No37 » Fri Jun 15, 2018 2:08 am

Thanks for your replies.
Upon further investigation I’m pretty sure this is simply a drain from the fuel fill port.
I’m fairly sure that it goes to the small drain hole directly behind the fuel fill hole itself (under the cap).

Which is what nampus said haha


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