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Old 02-02-2013, 02:45 PM   #3421
cyborg
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Quote:
Originally Posted by SmileyRider View Post
On the 70 degree racing website Dale says it is Cross linked Polyethylene
That's correct, both the OEM plastic subframe and the 70-degree tanks are cross-linked polyethylene. Polyethylene is a notoriously difficult material to glue/seal to. That's why you usually have to use mechanical means: molded-in inserts, molded threads, or bulkhead seal plugs to fill smooth edge holes, or rubber sealed bulkhead style fittings to create a fuel tap. Quite a bit of work I would guess.

I still have my OEM subframe which I am keeping as a backup for my 70-degree tank. The EOM subframe looks like it would hold quite a bit less than the 70-degree tank, but it's hard to tell accurately.

Cross-linked polyethylene and polyethylene in general can easily handle any type of fuel (gasoline, ethanol, diesel...), that's why they make gas cans out of it.
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Old 02-02-2013, 02:55 PM   #3422
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It looks like it would hold around 3 litres, maybe a little bit more, when you put them side by side. That is without knowing the thicknesses of each tank.
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Old 02-02-2013, 03:17 PM   #3423
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Quote:
Originally Posted by cyborg View Post
I still have my OEM subframe which I am keeping as a backup for my 70-degree tank. The EOM subframe looks like it would hold quite a bit less than the 70-degree tank, but it's hard to tell accurately.
When you get a chance, fill it with water and find out?

As for the Coswell stuff, I might not be remembering what they used. I'll find out. Should help seal any plugs as well.
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Old 02-02-2013, 03:25 PM   #3424
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OEM subframe conversion

Hi,

When Garry's team built the first 570 rallye bike they had to pioneer the tank solutions;It was described in this thread:
http://www.advrider.com/forums/showthread.php?t=416713.
For the subtank they used brass spigots that were threaded/glued into the base of the subframe as well as the rear of the main tank (they didn't drill through the fuel pump housing as later conversions do).
Both locations don't provide much "meat" in the plastic for thread so when I got the bike they had been repaired with teflon tape and glue, but neither lasted past the first few rides and had to be abandoned.
I still use the subframe (without fuel in it) and a skilled plastic welder sealed the holes in the main tank; to connect the Safari Tanks(front and rear) I then bought the fuel tap block that goes through the fuel pump housing and all is well.
Cheers waldecker
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Old 02-02-2013, 03:48 PM   #3425
Shawnee Bill
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Quote:
Originally Posted by waldecker View Post
Hi,

When Garry's team built the first 570 rallye bike they had to pioneer the tank solutions;It was described in this thread:
http://www.advrider.com/forums/showthread.php?t=416713.
For the subtank they used brass spigots that were threaded/glued into the base of the subframe as well as the rear of the main tank (they didn't drill through the fuel pump housing as later conversions do).
Both locations don't provide much "meat" in the plastic for thread so when I got the bike they had been repaired with teflon tape and glue, but neither lasted past the first few rides and had to be abandoned.
I still use the subframe (without fuel in it) and a skilled plastic welder sealed the holes in the main tank; to connect the Safari Tanks(front and rear) I then bought the fuel tap block that goes through the fuel pump housing and all is well.
Cheers waldecker

Thanks for the followup explanation.

Pass throughs and plugs in polyethylene are doable with bulkhead fittings and proper o-rings/gaskets. A little dab of gas resistant lube on the gasket to allow it to stretch and seat. Even saying that those type of fittings must be monitored and resealed from time to time or they will seep some.

Or as waldecker says an expert plastic welder can weld polyethylene.


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Old 02-02-2013, 06:43 PM   #3426
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I was just looking at the fuel tank and subframe of my '10 FX450. The plastics look identical. Same battleship grey color. Reckon they are the same?
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Old 02-03-2013, 12:42 AM   #3427
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Funny how this single thread gets more posts than the entire UHE.
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Old 02-03-2013, 04:49 AM   #3428
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Originally Posted by Blakduk View Post
Funny how this single thread gets more posts than the entire UHE.
What is the UHE?

Please bare with me, i'm new
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Old 02-03-2013, 05:22 AM   #3429
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for those with the force rally bash plate or stephans for that matter, how wide are these ? do they impact the bikes manouverability in the tight stuff as a result? do they add more protection re the brake/gear levers ? do you lose any ground clearance? just wondering from the perspective that i had an enduro engineering guard on my clutch slave unit and noticed a chunk taken out of it, don't know where or when it was done

thanks
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Old 02-03-2013, 06:36 AM   #3430
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UHF = Unofficial Husaberg Forum

http://husaberg.org/forum/
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Old 02-03-2013, 08:46 AM   #3431
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Originally Posted by Blakduk View Post
Funny how this single thread gets more posts than the entire UHE.
That is because we are NUTS !!!!!
and we love our BERGS
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Old 02-04-2013, 02:57 PM   #3432
SmileyRider
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So I have removed my subframe and I have already found a small issue.



If you can see in the picture, there are two holes near the top of the subframe. They are not threaded and they actually go inside.

They will definitely leak or allow crud into the tank. It doesnt look like there is enough thickness to thread something in there. But I figure I will give it a shot.

Has anyone else gotten this far yet?

I may try to find a plastic welder and see if they can seal it up
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Old 02-04-2013, 03:11 PM   #3433
Xmoto
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Quote:
Originally Posted by SmileyRider View Post
So I have removed my subframe and I have already found a small issue.



If you can see in the picture, there are two holes near the top of the subframe. They are not threaded and they actually go inside.

They will definitely leak or allow crud into the tank. It doesnt look like there is enough thickness to thread something in there. But I figure I will give it a shot.

Has anyone else gotten this far yet?

I may try to find a plastic welder and see if they can seal it up
Try these. Insert them wet with fuel tank sealer. http://www.rivetsinstock.com/rivet-n...FU-d4Aod2hoASw
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Old 02-04-2013, 03:12 PM   #3434
Seth S
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Quote:
Originally Posted by SmileyRider View Post
So I have removed my subframe and I have already found a small issue.



If you can see in the picture, there are two holes near the top of the subframe. They are not threaded and they actually go inside.

They will definitely leak or allow crud into the tank. It doesnt look like there is enough thickness to thread something in there. But I figure I will give it a shot.

Has anyone else gotten this far yet?

I may try to find a plastic welder and see if they can seal it up
I see at least 6 more problems that you will have to deal with
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Old 02-04-2013, 03:43 PM   #3435
SmileyRider
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A quick update from tonight. I filled the tank with water and it is not water tight. One seam had a steady stream of water coming out of it and a bolt hole leaked.
That being said I did manage to fill it up with water and definitely got over a gallon of water in there. I pulled out out 3.8 litres with a bit of spillage not accounted for. So my guess is that this thing would easily yield 3.5 litres or just shy of a gallon of usable fuel if plumed correctly.
I am contacting a local plastic welder and if the rates are cheap enough I will continue with this venture. Otherwise theres a guy locally selling a 70 degree tank.
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