KTM 950/990 Adv UNDERSEAT TANK

[rade]

Originally Posted by MortimerSickle

Will you have some way to vent between the sections, to release the air trapped by the frame-relief indentations? so the tank can filled completely?

Very good point!!! I have some solution, but still hesitating, if it is the best one cost/saved volume.
So far I have in plan to into the "square" areas you see on the attrappe, not "T fitting" but "L" fittings collected into one tube, that will be wired under the seat, along the airbox and it will end next to the tripple clapms.



Do you have any tips - pictures for inspiration?

[MortimerSickle]

Originally Posted by rade

..."L" fittings collected into one tube, that will be wired under the seat, along the airbox and it will end next to the tripple clapms.
...

It looks like that routing would take the line below the level of any air pocket, and so be unable to vent?

Originally Posted by rade

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...

Maybe better to connect to the rear (highest) chamber? That would solve the filling problem, but might present another problem, that of venting the cap without having gas slosh out while riding rough ground with a full tank.

I'm not helping much, am I.

[ciedema]

Can I ask some dumb questions?

Where is filler going to be?

Also will this replace the existing plastic under the seat or will that need to be cut?

[MrSandman818]

Yes you can. Haha.

Originally Posted by ciedema

Can I ask some dumb questions?

Where is filler going to be?

Also will this replace the existing plastic in the seat or will that need to be cut?

[ciedema]

Originally Posted by MrSandman818

Yes you can. Haha.

Hahaha - I can't even write what I mean.

[KarimADV]

This could be really interesting, for people like me looking for a small tank to be used in short distance enduro riding: i never found something that fits the needs of my 990 with ABS :)

[rade]

Originally Posted by KarimADV

This could be really interesting, for people like me looking for a small tank to be used in short distance enduro riding: i never found something that fits the needs of my 990 with ABS :)

Sorry Karim, but this one wont work for models with ABS:-(
But if this one project has pay back, I have some ideas about the auxiliary tank for models with ABS. So x-fingers pls :-)

[rade]

Originally Posted by ciedema

Can I ask some dumb questions?

Where is filler going to be?

Also will this replace the existing plastic under the seat or will that need to be cut?

The filler placement was under discussion too. You can see the considered options on the pix. The winner is the yellow spot. Itm. it will be under the seat, because:
- i dont have to solve the lock
- it will be low, so NOT needed to cut the seat it self
- more backward would be better because of the air chamber, but you would have to cut the ALU rack and you would have to more the ludgage when refilling...

So the decision is the yellow spot - you have 2-3 days to convice me other way before the final form 3D model is final

[craigincali]

make it so you can use a vented cap???? no gas sloshing out, no tubes to run.

[Oz Nutter]

What about those "race type" fillers, zero spillage no?
I guess you could have a dry break funnel attachment that you stash on bike , be great if it matched up with Rotopac (dimension wise) container mouthpeice for maximum versatilaty...

Hide the filler under false standard cap?/through side?

[two trackin fool]

[PowerCell]

If you vent the tank properly, you won't need a filler. It will fill when you add fuel to your main tanks as long as the valves are open. I've had this setup on my Husaberg and it works well and fills quickly...


.

[WelshLAMB]

I assume vent for rear tanks is lower than front tanks fuel level and level in fronttanks higher than rear filler when full. So does petcock have to be turned off until front tanks empty a bit?

I guess there are many raer racks out ther ...many different designs so hard to plan best location on rack. On other hand Unless your globe trotting then most likely need for extra fuel is a long days offroading (low mpg) when its unlikely you have luggage on. Then tank filler in rear rackis the 'cleanest solutio, and being higher than underseat might help with issues above?

Underseat is not so bad.... OH OK I don't know the answer!!

Very nice work though

[rossguzzi]

Under seat cap could be a pain if luggage is strapped over seat. I can see manufacturing wise it is the best place.

[rade]

Originally Posted by Oz Nutter

What about those "race type" fillers, zero spillage no?
I guess you could have a dry break funnel attachment that you stash on bike , be great if it matched up with Rotopac (dimension wise) container mouthpeice for maximum versatilaty...

Hide the filler under false standard cap?/through side?

Hmm, sorry, what you mean by "race type" filler? This? Where would you place? It is too deep so it would decrease the tank capacity...


And what is "dry break funnel attachment that you stash on bike" Could you post a picture pls.? (sorry english is not my native...)