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Gas tank sag

Discussion in 'Norton Motorcycles (Modern)' started by Britfan60, Jul 11, 2019.

  1. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    There a gnats hair left. You'd be surprised how little threaded space there is between the bolt head and the tank. I cut it flush to the bolt head, not the tank. I got a grip on it, but it pops off with force. The threaded sleeve spins too freely, Fred. Don't think that going to happen. Got my bracket welded. Just need some paint. FE, does that part come in stainless and is JB Weld that strong? Let's face it...the tank ain't gone fly off if the bond breaks. I'll try the penetrating oil and the most expensive damned drill bit I can find. Also, thinking of drilling, tapping and threading a bolt into it and still putting a nylon core nut from the bottom. Lots of options. I'll be ok. Lots on the plate this summer. Daughter is moving out. Lots of time and cash...damn it.
    AND....my Bonnie is now stalling when hot. New Pazon, coils, battery, wires. Gonna just drain the tank, carbs and get new plugs for now.
     
    Last edited: Aug 12, 2019
  2. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Perhaps you can glean info from here and find a local source:

    https://www.fisheriessupply.com/weld-mount-systems-1-4-20-threaded-stainless-steel-stud-mounts

    IMHO JB weld will be plenty strong enough so long as you use a large diameter base to give a large contact area for the JB weld.

    I remember a store selling JB weld years ago had two used valves from an engine with their heads JB welded together and challenged folk to break them apart. The stems got quite bent over the years but I never saw that JB weld give way!
     
    nopdog likes this.
  3. BritTwit

    BritTwit VIP MEMBER

    Joined:
    Aug 25, 2009
    I've used JB Weld on aluminum and steel components and it is absolutely a very strong bond. You have to apply a very thin coat of weld to the surface. I've never used their weld for plastic components though. They make JB Weld for just about every material in creation. Also, Curtis as you said, the tank is not going to fall off the bike if the stud comes loose. You just need to keep an eye on it.

    It'd be nice if maybe Norton would chime in here with any suggestions.
    Have they repaired any tanks with this type of problem?
     
    jan nelder likes this.
  4. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    The bolt is obviously stainless. Not sure the threaded sleeve is due to interior discoloration. Wondering if some ultra thin holes drilled around the sleeve and injection of some JB Weld around it, then an EZ out might do the trick. Options. Not necessarily a bad thing.
     
  5. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
  6. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    I'm mounting the bracket and reassembling my bits. Then realized in the photo comparison, Richard P.s bike has two relays on the frame, mine has one. Anyone know why? Norton relay.jpg
     
  7. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Mines got two... but I don’t know why!

    Anyhow... what did you do with your tank stud in the end?
     
    Britfan60 likes this.
  8. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    I just got back my repaired bracket and painted it, had to dry, reassembling the bits. No progress on the tank yet. Daughter is moving out so full plate. Also, just got those studs in the mail today. Need the epoxy....should I go that route. It seems the easiest way, I just feel like I'd be screwing up the tanks originality.....not that THAT worked out so well. Tanks only been off twice and bolts have been snugged up barely more than finger tight.
     
  9. BritTwit

    BritTwit VIP MEMBER

    Joined:
    Aug 25, 2009
    Any word from Max at Norton, or anyone else?
    Even is you were able to get the sawed off bolt out, the insert is spinning so it's useless.
    You're gonna do just the left side mount and keep the right side bolt, or both sides?
     
    Britfan60 likes this.
  10. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    I never specifically asked anyone from Norton. It was the right side that was spinning. I wouldn't do both. unless there was an unevenness in height, which I doubt. I've considered using the JB weld on the edges of the sleeve if I can drill a little space along side it. Who knows? Maybe I'll use the stud and eventually pop for a painted aluminum tank down the road.
     
  11. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    20190903_125510.jpg 20190903_125510.jpg 20190831_153932.jpg Thank you Fast Eddie for that Fantastic idea. My bracket is welded the tank is back on with the stud and nylon lock nut with a washer. I like it better than the original design. I'm back in action and I'm keeping it.
     
    MxMartin, BritTwit and jan nelder like this.
  12. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Cool! Glad it worked out Britfan.
     
  13. BritTwit

    BritTwit VIP MEMBER

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    Aug 25, 2009
    Looks like a good mod.
     
    Britfan60 likes this.
  14. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    Its is a good mod. Thought it would be obtrusive but its not. Its a strong hold, lined up well. To get that sleeve out would have been major surgery. Not sure, but think its a helicoil?? A threaded sleeve with a large flange glassed in or epoxied in, or maybe dropped in before final assembly?

    Also, fellas, avoid getting gasoline on these tanks. Some dribbled from the fuel line fittings attached to the underside of the tank. The paint bubbled up and peeled of immediately. Literally. Glad I was near a hose to rinse it off right away.
     
  15. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    Oh well. JB WELD didn't hold. Surfaces were extremely clean too. I'll try again and reapply. At least it didn't sag with the bracket welded.
     
  16. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Bugger!

    Perhaps there’s a better alternative ?
     
  17. TonyA

    TonyA VIP MEMBER

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    Jan 16, 2015
    The surface needs to be sanded matte finish or rough even for the epoxy to hold on. Try again and rough it up with sand paper first . Look for a grinding disk for your drill . Don't go too deep , but its got to be rough enough to hold.
     
  18. Britfan60

    Britfan60 VIP MEMBER

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    Jan 5, 2014
    I cleaned it and roughed it with a Dremel and fine grinding disc. I think what contributed to it not holding was the bolt didn't drop in dead center so a had to manipulate it, thus leaving some sideways pressure on the bolt. Between that and 150 mile of vibes may have done it. Also, only let it cure for 45 minutes before installing the tank.
    What I did now was just leave the bolt in, slide some emery in there to rough it up a bit and let the tank drop onto the bolt naturally with no pressure on some fresh epoxy, stood there and pressed it down for a half hour till it cured. It seems solid. Hopefully it will hold.
     
    Fast Eddie likes this.
  19. TonyA

    TonyA VIP MEMBER

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    Jan 16, 2015
    I suppose an Aluminum tank replacement is out of the question ?
     
  20. Stephen_Spencer

    Stephen_Spencer VIP MEMBER

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    May 31, 2017
    Hey Tony,

    Like minds!!! It’s where my mind went to straight away. I even created a story in my head, explaining to the wife how the Ally tank was the only option for my broken standard one!!!
     
    Bluey72e likes this.

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