leaking fuel tank on rd 350 f2

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roadrunner
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leaking fuel tank on rd 350 f2

#1 Post by roadrunner » Fri May 05, 2017 2:19 pm

Hi. i just wondered if anyone can help me. I have an rd 350 f2 with a fuel tank that weeps on the underside. Am I best to weld/braise the bottom of it or just line the inner with an ethanol proof slooshing kit. If so can anyone advise about the best to use.
cheers.

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two-stroke-brit
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Re: leaking fuel tank on rd 350 f2

#2 Post by two-stroke-brit » Fri May 05, 2017 5:44 pm

ah the joys of 80s Yamaha gas tanks.
i had one welded in several places then lined,so far so good.
it depends on if is just one spot or a motorcycle colander
ymmv.
good luck
mark
350LC,Athena 392 big bore,stock porting,swiss cheese air box,stock reeds,spec11 pipes.(now TSA big bore pipes)
She might not be pretty but she will always be a fun ride


1982 YAMA RD350LC
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RuZty
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Re: leaking fuel tank on rd 350 f2

#3 Post by RuZty » Fri May 05, 2017 6:10 pm

Mine leaked through rust perforation at the very lowest point opposite the petcock. The rest of the tank was solid so I rinsed it with a rust remover and then built the outside up with some solder. The damage remained on the bottom surface, between the seam and the side, above the front of the side panel. I touched it up with a spray can after filing it smooth and it is still good nearly 20 years later.

roadrunner
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Re: leaking fuel tank on rd 350 f2

#4 Post by roadrunner » Mon May 08, 2017 4:18 pm

Hi guys.My fuel tank used to be a motorcycle colander. I sent it away to have the worst holes welded. It was glass lined apparently really badly as it still weeps on the underside. Now not sure what or how to fix it. Will soldering fix it? If so what type of solder should i use? Any idea's....

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Evans Ward
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Re: leaking fuel tank on rd 350 f2

#5 Post by Evans Ward » Mon May 08, 2017 4:56 pm

A quality tank lining kit (POR15, Caswell) should take care of that issue without any problems. If you do use a tank liner kit, it is imperative you follow every step and in full compliance. Personally, I've done 4 tanks with the POR15 kit with excellent results. Have heard the Caswell kit to get the latest and greatest.
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T.RexRacing
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Re: leaking fuel tank on rd 350 f2

#6 Post by T.RexRacing » Mon May 08, 2017 7:15 pm

I use RedKote for tank repair. Easy to use and little prepwork needed. Ethanol will bleach the red color from it occasionally but doesn't effect the sealing properties. I get it from the local NAPA store. $25 USD a can. A can will do two large tanks easy. Use it OUTDOORS the fumes are toxic.

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RuZty
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Re: leaking fuel tank on rd 350 f2

#7 Post by RuZty » Mon May 08, 2017 10:49 pm

roadrunner wrote:Hi guys.My fuel tank used to be a motorcycle colander. I sent it away to have the worst holes welded. It was glass lined apparently really badly as it still weeps on the underside. Now not sure what or how to fix it. Will soldering fix it? If so what type of solder should i use? Any idea's....
If it is really bad soldering might not be the solution. Mine was about an inch square area at the bottom corner, the seam was okay and the outside surface was rust free. If it is peppered with holes and the seams are rough a liner might be the best idea. I have never used a liner so I can't add to that but I consider them a last resort in fear that it might separate down the road, preparation is everything.
I just looked up Redkote as I have heard good things about it, their info says to solder any holes over 1mm.

roadrunner
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Re: leaking fuel tank on rd 350 f2

#8 Post by roadrunner » Thu May 11, 2017 7:10 am

Thanks for your help..I'll let you know how i get on. Hopefully it'll end with another bike on the road, I've only had it ten years..

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jimrd
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Re: leaking fuel tank on rd 350 f2

#9 Post by jimrd » Sun Feb 18, 2018 5:52 pm

I have an rd 350 f2 with a fuel tank that weeps on the underside. Am I best to weld/braise the bottom of it or just line the inner with an ethanol proof slooshing kit. If so can anyone advise about the best to use.
The guys in Toronto are great RENU they are on Martin grove road , Rexdale Ontario , near airport

they cleaned and lined my tank

they did a great job
1964 Austin Cooper S 1071cc
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1981 RD350LC , R1 Front,toomey pipes, Barnet Clutch, ported , PJ carbs, R1 Speedo 01
1983 RZ 350 - stroker bike,R6 rear shock,tapered stem bearings,progressive springs,

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