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Old 03-09-2013, 10:41 AM   #16
Lensgrinder
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Very nice work, looks great. Very well thought out.

A friend added a tank to the back of his F650GS, he had used a ball valve to transfer fuel, but I had a couple of normally closed soleoid valves, so he installed one and put the switch on his handle bars.
It has worked well for him.
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Old 03-09-2013, 11:00 AM   #17
WindSailor
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Dan: nice setup, it's usable, you can stack gear on top of it, and without mention it's probably more than crash worthy dependable - which in my opinion really counts.

A few years ago I went to a local seminar held by Bruce Hansen on touring the Pacific Northwest. He had a slide show of places and things (looking down a specific road, out of a window of a restaurant, at an outcropping of rocks, etc. etc.) that lasted about an hour and a half. We had a small crowd there in which THEY KNEW about 95% of those pictures that were shown. I was thoroughly impressed and kind of embarrassed I didn't know more than what I did.

One of the guys there (I'll just call him "Pappy") was an older than dirt guy that had a GSA and told me he packs at least 5 extra gallons of fuel with him when he goes on a trip. I started laughing (couldn't help it) saying that was over kill - and ol' Pappy just raised an eyebrow and stared at me. Uh - oh.

Well... I was wrong...

It's the route between the gas stations that make the trip. Those guys I met there at that seminar literally define what Adventure touring is all about.

Ride safe,
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Old 03-09-2013, 05:01 PM   #18
ROAD DAMAGE
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aux tank

Nice clean work on the tank. it looks good.

I've got to ask ........... why add 6 gallons capacity to a bike that all my friends call "The Supertanker" anyway?

The only time I've seen this type set up is for Iron Butt guys. Is that what you're up to?

Even at a tad less than 9 gallons, I wish my ass could last for as long as my fuel lasts! I've got almost 90K on my present scoot and I don't think I've ever burned a full tank of fuel in one sitting.

Again, nice fabrication job.

Rob
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Old 03-09-2013, 09:29 PM   #19
Kevreif
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Originally Posted by PhiSig1071 View Post
Nice clean work.

That's a hell of a lot of gas. And weight, 21lbs dry, plus 6lbs per gallon, 6 gallons is 36 lbs, 57lbs total high up and back on the bike. Plus the tire.

Is this for a hack rig? Any thoughts on increased tire wear due to that extra weight on the back?

Where is the transfer filler on the main tank? Is it going to be pretty low on gas before it starts draining out of the aux tank?

I found with my semi aggressive driving style that with my bike loaded for a three month trip that my rear tire lasted significantly longer (13,500 vs best tire mileage empty was 8,000.. both metzler tourance) with the weight and it was deff not due to lack of aggressive riding. although i had to adjust and use less front brake and more rear brake because my front tire started cupping quickly... on that note you hardly notice 50-60 pounds on the back of a GS.
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Old 03-09-2013, 10:04 PM   #20
kk3an OP
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Hi Rob - yep, you're spot on. This explains it: www.kk3an.com

Rick (Windsailor) - great story for sure! I too have been in too many places where the fuel gauge dictated where I'd be sleeping that night. Not something I care to continue doing.

Yes the weight "is what it is". In part of this winter's project, I dumped my hard luggage for soft luggage and captured about a 20 LB weight savings because of it. That alone justified the weight of this tank being 21 LBS dry (empty).

In reality my bike is equal in weight (or perhaps lighter) with the auxiliary tank full of fuel and soft luggage, versus a typical GSA setup with hard luggage and a top box.

The baffling is what makes or breaks something like this. With cross-baffles installed like I did, you don't even feel the fuel move. It's like having a cinder block strapped on.

Dan

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Old 03-09-2013, 10:32 PM   #21
mike cummins
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weight a sec

It dont make sense. Handling will suffer unless the fuel is put down around the footpeg area.
Adding weight to the rear will make it a dangerous proposition I think. However I do admire your ability in making it.
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Old 03-09-2013, 11:18 PM   #22
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Obviously you didn't factor in that he will be riding north of the equator. Handling should be fine.
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Old 03-09-2013, 11:28 PM   #23
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Dayem!
How far away is your Starbucks anyway??

Seriously though, great job, it really looks well made and useful.
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Old 03-10-2013, 03:18 AM   #24
tagesk
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Quote:
Originally Posted by kk3an View Post
Hi Rob - yep, you're spot on. This explains it: www.kk3an.com
Holy mackerel

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Old 03-10-2013, 08:26 AM   #25
space
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Nicely done!

I'm sure you've considered this, but I thought the IBA limit was 11.5 gal? Perhaps that doesn't apply here, since your run isn't a rally.

In any event, good luck with the ride! Stay safe, and keep ADV posted.
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Old 03-10-2013, 09:58 AM   #26
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His run won't be 'sanctioned' by the IBA, yet they will document it in their archives as one hell of an achievement (or attempt). To all those concerned about that weight...Have you never ridden with a passenger? When you ride with a 57 pound passenger your bike doesn't suddenly start handling erratically. Make the appropriate suspension adjustments and ride accordingly.
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Old 03-10-2013, 10:01 AM   #27
BMWRich
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First off...excellent work!
Using "My actual mpg figures" that would equal somewhere around 658 miles total range.
And, at an average of 50 ground miles an hour,(up/down,curvy roads 'n all),
a 13.16 continuous hours in the saddle. OooooooWEEE...!
Right now, my standard GSA tank already has me "crying to stop" just under the 400 mile range..! That bike kicks my ass...!
With your setup,I'd either be molded to the bike with blood clots or once off,not able to sit for week...! Hehehe!
Good luck
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Old 03-11-2013, 11:11 PM   #28
PukaWai
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Quote:
Originally Posted by kk3an View Post
Hi Rob - yep, you're spot on. This explains it: www.kk3an.com
Forget Iron Butt, iron's way to brittle to last that long. Maybe it's time for Titanium Butt...
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Old 03-11-2013, 11:29 PM   #29
feldjäger
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There is job for you in Russian space program !!

OT

(Nice handy work)

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Old 03-17-2013, 09:01 PM   #30
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nice work on the tank.

Is that flux core you are using? Can you tell me what welder, heat and wire you were using?

I wonder if putting several holes in each baffle would have cut down on weight and increased fuel to the point you could tell a difference?

Thanks for the pics.
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