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Motorcycle gas tank repair

Discussion in 'Off Topic' started by Oregonhunter5, Mar 29, 2016.

  1. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    i have a 1973 Kawasaki 100 that I learned to ride on. It was at my granddads place. The bottom of the tank has some pin holes in it. Iron monster do you do this type of work?
     
  2. 2A2Dend

    2A2Dend .. Well-Known Member

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  3. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    I know what you mean.....
    But, I'm more sentimental than most anyone and that tank is the one I want to use. Sounds stupid I know.
     
    2A2Dend likes this.
  4. Mark W.

    Mark W. Silverton, OR Bronze Supporter Bronze Supporter

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    POR-15 has some gas tank repair products.

    If you know someone with a small cement mixer you can shove some thick foam rubber in the drum and then wedge the tank inside that. Put 3-4 hands fulls of old nuts and bolts or even roofing nails in the tank and let it spin for a couple hours this will remove all the rust. The tank will need coating ASAP no sorry I should have said RIGHT AWAY. You can also use White vinegar to cut any rust But again you have to coat and seal immediately.
     
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  5. 2A2Dend

    2A2Dend .. Well-Known Member

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    Mark is sharing a great bit of info. It can be fixed, but the process is tedious!
     
  6. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    There's a guy in Florida that would charge $600.00 to fix and line. That's to much. He says his coating is lifetime guaranteed and all others fail in short order.
     
  7. jbett98

    jbett98 NW Oregon Bronze Supporter Bronze Supporter

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    I would try the Battery Charger/Super Soda Wash method to remove all of the rust from inside the tank.
    It won't hurt the outside paint job and then I would take it to a radiator shop and see if they could save the tank as they have the knowledge and materials to rescue it.
     
  8. IronMonster

    IronMonster Washington Opinionated Member Diamond Supporter

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    I have tried to repair a few tanks and it always seems risky at best. A lot depends on what condition the steel is really in. Often when you get to the point there are pin holes the steel around that area is so shot that the whole section has to be chopped out and replaced. $600 seems like a lot but really if that includes redoing the paint its not unreasonable at all,

    I know you want to keep it original but really if you can find a replacement tank that's what I would do. Put the original on a shelf and keep it as a second keepsake?
     
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  9. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    Well yes that's an option. But I'm being stubborn. bit maybe I will change my mind.
     
  10. Stinkerbelle

    Stinkerbelle Tualatin, Oregon Bronze Supporter Bronze Supporter

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    Heres someone who does tank repair...

    http://www.gas-tank.com/bike.htm

    Looks like he is in pennsylvania. Says average price runs $300 to $395....unpainted....
     
  11. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    Thanks
    Looks like the price I was quoted is normal. Man all the memories and how it takes me back to a better day and time...
     
  12. jbett98

    jbett98 NW Oregon Bronze Supporter Bronze Supporter

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    eBay has one like new for only $300.00


    s-l225.jpg
     
  13. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    That's pretty
    This one is orange
    You guys are good buds for searching for me. Thanks!!
     
  14. jbett98

    jbett98 NW Oregon Bronze Supporter Bronze Supporter

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    I'm going to visit a place called Cycle Heap later on this week.
    They've got a ton of old bike parts and I happen to know a guy who works there.
    I'm looking for some rear view mirrors for a 68 Honda Trail 90 I just traded into.
    I'll ask him if they have one laying around.
     
    Brutus57 likes this.
  15. Brutus57

    Brutus57 Skagit County Well-Known Member

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    Having had some vintage bikes I'd recommend being very careful, if its got pin holes you have no idea how thin the rest is. Sure, there might be enough material to weld a new bottom or patch on but remember..... the gas tank is right over a hot "air cooled" motor.
    I did the clean out and restore on a 20 gallon 4x4 truck tank, etchant, chains,sealer, etc....some of the kits do work. If you plan the friction with bolts rattling around method posted above...DOn't, use a chain which is not as likely to add holes, dents. Best advice is buying a matching replacement as above. original tin for motorcycles is nice, but the frame and engine are the key parts.

    Brutus Out
     
  16. Fast Eddie

    Fast Eddie Vancouver Well-Known Member

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    Give Red Kote a try.
     
  17. Dyjital

    Dyjital Albany, Ore Flavorite Member Bronze Supporter

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    Insert a bladder into it and call it a day.
     
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  18. BillM

    BillM Amity OR Bronze Supporter Bronze Supporter

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  19. Oregonhunter5

    Oregonhunter5 2C IDAHO Well-Known Member

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    Thanks!
     
  20. Mikej

    Mikej Portland Gold Supporter Gold Supporter 2015 Volunteer 2016 Volunteer

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    I've got original Honda spec books for that ifin you need specs. Those CT 90s were way popular for deer hunting in Utah when I wrenched in the Honda shops. First bike was a '68-'69, can't remember for sure now. Isn't that the first year of "Quick change" high/low? Still needed a wrench though, 12mm IIRC.