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Hole in my fuel tank!!!!

Joined Mar 2012
235 Posts | 5+
South Australia
Been awhile since i've been on here, hello all! Took my 570 for a blast today, first time in over a year due to mechanical issues and work commitments. It has been pretty hot here of late so i have been putting off the running in of my new engine. Today however was quite mild and i just couldn't hold off any longer! WOW! It came back to me straight away just what these machines are all about, so fast on the single track through the trees! Just awesome to be on it and going fast again! The new titanium FMF mega bomb and 4.1 system barking as i got acquainted with my old friend, wondering to myself why it had been so long!
So i was coming to the end of my ride when i came across a fallen tree on the track, it was laying over a nice easy left hand bend. I sussed it out and picked my line, hitting it in third and on the gas. BAM! I didn't see the other branch sticking out from the left of the track! It hit me on the left shin ( thank you once again boots!) and speared up between my leg and the frame, finding a home up between the seat and the fuel tank! Just about brought the bike to a complete stop and launched me forward as the branch broke and me and the bike continued down the track on the front wheel! Got away with that, i thought, and continued back to my ute.
When i pulled up i could smell fuel and soon realised it was leaking profusely from the left side of my bike. Thats when i noticed the piece of branch wedged between the frame under the seat and the fuel tank, piercing the fuel tank!
The piece of branch is about 75mm long and 20mm in diameter. Luckily the part that pierced the tank is only about 5mm in diameter!
Im afraid to ask if anybody knows what a replacement tank might be worth in Australia! Im going to have a go at patching it tomorrow but dont quite know how yet! Maybe rough the area up and cover the area in two part glue? Any ideas would be greatly appreciated!
 
Be glad it was the tank it punctured... 8O
Look at the DIY subframe tank threads (google), they have different solutions and products that stick to the plastic.
 
Thanks guys, that repair stick stuff looks pretty good. Im gunna give it a go with some two part resin glue that i already have here and see how it goes for now. I have done a search on here and it seems alot of people recommend crazy glue. The stuff i have is Selleys Araldite Epoxy Adhesive. I know it is fuel resistant as i have used it to repair and seal the carb on one of my cars, a mate of mine recommended it after using it a few times himself. The only thing is that it sets rigid, might crack in this application ( if it sticks to this type of plastic at all). Will report on how it goes.
 
Does anybody know what plastic the tank is made of? Polyethylene? I ask because i have just patched my tank, it seems to be ok so far, but read the back of the packet of the glue and it says it wont bond polyethylene or polypropylene. Guess i will see how it holds out!
 
I have not had good luck with glues with fuel tanks made from poly materials.
If the hole is 5 or 6mm this will work.
large round headed bolt 5 or 6mm thread size. What ever fits the hole.
Under side of bolt head, have machine shop cut groove for small o-ring make sure it is a fuel o-ring. leave 0-ring .25 to .30mm above underside of bolt head to seal against inside of fuel tank. Use a little grease to stick o-ring to bolt head.
with a wire feed welder tack 1 meter of .50mm (.020") wire on the thread end of bolt, run the wire in the biggest and closes opening in the tank to the hole and feed wire from inside the tank through the hole. Then carefully pull bolt through the hole.
The o-ring on the bolt head against the inside of the tank, use a small sealing washer and thin nut. tighten nut. File bolt flush with nut. Use epoxy over the nut if your riding gear contacts nut. Not sure where the hole is. This will permanently seal the tank with no problems. No chance of ruining a ride or burning the bike down as glue could do.
 
Thank you, that sounds like it would work a treat. The hole is more of a slit than a hole, the plastic seems to have split as the wood pushed through. The epoxy seems to have worked for now but i guess time will be the telling factor!
 

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