Underseat tank for HP2 - Page 2

bavarian · 04-15-2008, 04:48 AM

Quote:

Originally Posted by Poolside

Cool that a garage enterprise is going for this.

What sort of plastic manufacturing method is this tank going to be?

No no no, he's a pro working in the plastic business, mainly doing plastic for BMW 7 series, tubes, fenders etc.

Mr. Magoo · 04-15-2008, 04:58 AM

Interested potential buyer here.

Poolside · 04-15-2008, 05:09 AM

Quote:

Originally Posted by bavarian

No no no, he's a pro working in the plastic business, mainly doing plastic for BMW 7 series, tubes, fenders etc.

That's fine, there are many professionals based in a home lab/shop. I didn't mean anything by it.

So what type of plastic? Some Europeans consider plastic to include fiberglass and resin.

bavarian · 04-15-2008, 05:30 AM

I'll get more info over the weekend and post them here.

Steady · 04-15-2008, 05:36 AM

I would be in. Assume it will fit on a bike with pillion foot rests?

oziexplorer · 04-15-2008, 06:03 AM

I'm interested.
I already have an AQ tank setup; but it's not always that you want that those tanks attached.
Having the smaller "pod tank" permanently attached with a low COG will definitely make the HP2 a more attractive "populated area" tourer.
In the Aussie outback, we need every drop of fuel, since it's not guaranteed that the service station will be open, or even have fuel available....

Another guy posted drawings earlier for a metal option (looked pretty good to me): http://www.advrider.com/forums/showt...=242555&page=3

I'm not a fabricator, but have thought seriously about getting one fabricated as a back-up tank, in case one of the AQ tanks were punctured in a crash

ebrew · 04-15-2008, 06:51 AM

be in as well

alfaris · 04-15-2008, 07:08 AM

Quote:

Originally Posted by Poolside

Oh no, you're not done by a kilometer. Work out the €-per-additional-liter for your 4 combos

you´re right , i am too influenced by current stock markets situation.......

anyway, an underseat tank is the right solution for the main HP2 concern: fuel range.

bavarian_markus · 04-15-2008, 08:28 AM

Quote:

Originally Posted by Poolside

So what type of plastic? Some Europeans consider plastic to include fiberglass and resin.

Hallo,
the material is Polyethylen (the same material like fuel reservoirs)
I form two halfparts and weld them

greetings, Markus

Some Dude · 04-15-2008, 08:54 AM

Quote:

Originally Posted by bavarian_markus

Hallo,
the material is Polyethylen (the same material like fuel reservoirs)
I form two halfparts and weld them

greetings, Markus

sounds good to me, will the transfer pump be an inline unit or built into the bottom of the tank? I personally would like a side fill off of the right rear. Having to remove the seat with tail bag fitted gets to be a pain, just my opinion.

bavarian_markus · 04-15-2008, 09:01 AM

Quote:

Originally Posted by BMW Atlanta

sounds good to me, will the transfer pump be an inline unit or built into the bottom of the tank? I personally would like a side fill off of the right rear. Having to remove the seat with tail bag fitted gets to be a pain, just my opinion.

My first edition will be filled under the seat, because i want it in this way. but when there is more request for o side filling resolution, I will desingn it! And of cours on the right side

alfaris · 04-15-2008, 11:08 AM

Quote:

Originally Posted by bavarian_markus

My first edition will be filled under the seat, because i want it in this way. but when there is more request for o side filling resolution, I will desingn it! And of cours on the right side

Congratulations, you bring new hope for those HP2 users, like me, concerned on fuel range, weight distribution and not to loose HP2 original look.

Please let us know whenever your invention is ready. Thanks.

RSL · 04-15-2008, 11:19 AM

Get a mylar 1 gallon liner from a Starbucks coffee box, or similar from a wine box. Make a protective envelope from ballistic nylon. Add fuel line and quick dissconnect, and T this into the overflow line from your tank, or similar plumbing suitable for your bike. When you fill the tank, it will go into the bladder, then be drawn back out as fuel is used.

Being a fuel bladder, this will conform to various shapes, including under seat, etc. Perhaps there are other suitable locations on your bike, such as under the fairing, and protected by it. The protective envelope and some foam will protect the bladder from abrasion or puncture.

Cost should be less than $20 for the works.

Weight is only a few ounces.

Do a search for mylar bladder here on ADV Rider, as others have done this, for years, with no ill effects reported.

ARRRGGGHHNUT · 04-15-2008, 12:37 PM

Quote:

Originally Posted by bavarian

Got a friend in Germany who will produce a batch of underseat tanks for the HP2. The tank will be plastic (choose your color), hold approx. 8 liters/2gallons and will pump the fuel constantly back into the main tank when it empties. Costs will be around 500 Euros including pump etc. ready to install. If there is interest, I would consider taking the ordeal of organizing shipping etc. Anyone want one?

I'm interested w/ a side fill option. Thanks guys!

Mav · 04-15-2008, 03:40 PM

I'd be interested in one of these tanks as well. Having to take the seat off is no biggie to me as I would rarely use the extra 8 litres - it would only be for those extra long days.

Looking forward to seeing more pics

04-15-2008, 05:30 AM	#19
bavarian ^OP bavarian Joined: Nov 2003 Location: Munich, Bavaria Oddometer: 1,741	I'll get more info over the weekend and post them here. __________________ R 1100 GS K75C DR 350

04-15-2008, 05:36 AM	#20
Steady Flogster Joined: Sep 2006 Location: Johannesburg South Africa Oddometer: 281	I would be in. Assume it will fit on a bike with pillion foot rests? __________________ "1200GS. It's like the girl you marry, reliable, maybe a bit overweight but you know she will always look after you even though she may not be the most exciting ride. HP2. It’s like the pole dancer you have thoughts of running away with, you know at some point it will end in tears but you just have to come back for more, at times it makes no sense but when you get down and dirty who cares about sense." - scotsmun

04-15-2008, 06:03 AM	#21
oziexplorer fugarewe tribe member Joined: Aug 2004 Location: Perth, West Oz Oddometer: 1,164	I'm interested. I already have an AQ tank setup; but it's not always that you want that those tanks attached. Having the smaller "pod tank" permanently attached with a low COG will definitely make the HP2 a more attractive "populated area" tourer. In the Aussie outback, we need every drop of fuel, since it's not guaranteed that the service station will be open, or even have fuel available.... Another guy posted drawings earlier for a metal option (looked pretty good to me): http://www.advrider.com/forums/showt...=242555&page=3 I'm not a fabricator, but have thought seriously about getting one fabricated as a back-up tank, in case one of the AQ tanks were punctured in a crash __________________ Cheers, Dave BMW HP2 2006 KTM 450 EXC

04-15-2008, 06:51 AM	#22
ebrew Motorcycle A.D.D. Joined: Nov 2005 Location: Denver colo Oddometer: 889	i may be in as well

04-15-2008, 03:40 PM	#30
Mav Something witty... Joined: Sep 2006 Location: Blighty Oddometer: 3,612	I'd be interested in one of these tanks as well. Having to take the seat off is no biggie to me as I would rarely use the extra 8 litres - it would only be for those extra long days. Looking forward to seeing more pics __________________ Mav ------------------------- All the gear.. no idea!

04-15-2008, 04:58 AM	#17
Mr. Magoo Follow me; I'm lost! Joined: Oct 2006 Location: Sandhills of NC Oddometer: 4,287	Interested potential buyer here.

04-15-2008, 11:19 AM	#28
RSL Beastly Adventurer Joined: Jun 2003 Oddometer: 4,007	Get a mylar 1 gallon liner from a Starbucks coffee box, or similar from a wine box. Make a protective envelope from ballistic nylon. Add fuel line and quick dissconnect, and T this into the overflow line from your tank, or similar plumbing suitable for your bike. When you fill the tank, it will go into the bladder, then be drawn back out as fuel is used. Being a fuel bladder, this will conform to various shapes, including under seat, etc. Perhaps there are other suitable locations on your bike, such as under the fairing, and protected by it. The protective envelope and some foam will protect the bladder from abrasion or puncture. Cost should be less than $20 for the works. Weight is only a few ounces. Do a search for mylar bladder here on ADV Rider, as others have done this, for years, with no ill effects reported.

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