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Old 02-02-2013, 10:46 AM   #3421
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Just a little worried that since the subframe doesn't hold fuel from the factory is the plastic OK for that use?

Anyone know for sure?
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Old 02-02-2013, 11:44 AM   #3422
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Originally Posted by LukasM View Post
What for do you want to coat it? That stuff is made for metal tanks that rust.

Nobody coats their plastic tanks...

Ducati owners use the Coswell stuff to prevent their tanks for expanding and sometimes splitting. The modern plastic tanks can't deal with the ethanol or some other additive. The coatings are made for plastic tanks. Might be hard to make sure every inch if its coated, though.
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Old 02-02-2013, 01:55 PM   #3423
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UW - you mean this one?

http://www.caswellplating.com/restor...nk-sealer.html

The fine print says "Bonds to almost anything except polyethylene (gas tanks are not made of polyethylene)."

So who knows the plastic type of the stock subframe material?
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Old 02-02-2013, 02:15 PM   #3424
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On the 70 degree racing website Dale says it is Cross linked Polyethylene
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Old 02-02-2013, 02:45 PM   #3425
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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   #3426
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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   #3427
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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   #3428
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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   #3429
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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   #3430
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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   #3431
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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   #3432
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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   #3433
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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   #3434
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UHF = Unofficial Husaberg Forum

http://husaberg.org/forum/
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Old 02-03-2013, 08:46 AM   #3435
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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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