cheapo Chinese tank leaky like sieve!!

Discussion in 'General Questions' started by Bgnlb, Jul 10, 2014.

  1. Bgnlb

    Bgnlb Member

    I have 2 motorbikes, 3 gas tanks only 1doesn't leak! Because I had the leaky stud welded anyone got the fix for this piece a crap tank problem?

  2. HeadSmess

    HeadSmess Well-Known Member

    im never go to say this again. doesnt ANYONE know what SEARCH is for?





    some INGENUITY/IMAGINATION... :dunce:
  3. crassius

    crassius Well-Known Member

    the fix is to stop over-tightening the tank - the collar under the studs will bend in toward the center when it is too tight and make the studs leak
  4. Bgnlb

    Bgnlb Member

    Gee thanks,have a good day.
  5. Bgnlb

    Bgnlb Member

    They weren't over tightened, they were knocked over in the garage. What's with attitude not like you're building rocket ships get over yourself:)
  6. HeadSmess

    HeadSmess Well-Known Member

    i said what to do. do it. fix the issue. get practical.

    always do it, because every tank ive had, has leaked, even before placing on a bike. i do stuff compressed air into these things and check this sort of stuff, yknow...
    nothing to do with over tightening at all. those brackets bend simply by looking at them, and uri geller, i am NOT!

    sitting behind a screen doesnt fix it. getting your hands dirty...DOES!
  7. Bgnlb

    Bgnlb Member

    Do you talk to people like that face to face?I'm 53 I've been a carpenter for 30 yes,15 yrs superintendent for concrete contractor. I've been riding dirt bikes since 1970,bought my 1st home in 89,raised a family,waiting on some come across as tough guy,hardass who you trying to impress?we're talking about a two bit motor that's basically a hobby. Not some government project that's over budget and behind schedule. Take it easy young man all that stress is gonna put you in an early grave.I'm not hatin on you,I was kinda like that at work.but I found out you get more work out of people when you treat them'll be ok.
  8. butre

    butre Well-Known Member

    my bike has been laid down several times and I've never had a tank leak. don't overtighten and don't use rubber between the tank and frame
  9. HeadSmess

    HeadSmess Well-Known Member

    sorry, its nothing personal.

    just sometimes one repeats things over and over and the answers are so bleedingly OBVIOUS.

    if you have been in the position of foreman as you say, you should be well aware of just how stupid people can be. im not saying your stupid, not at all.

    if you have been superintendent for a concrete company, if you are a carpenter, shouldnt using a bit of solder be fairly obvious? really? can you change the blade on your circular saw? tell the 13mm M8 left hand bolt holding the blade in from a 5/16" unc RH? dont you flinch on the inside and get a tad annoyed when a 4th yr apprentice shoves a brand new blade through a nail for the third time that day? grabs multigrips or a shifter rather than the correct spanner? you said it gently the two previous times.... but somewhere the line must be drawn... tools cost money! im sure youve seen formwork collapse because some fool was too busy checking out the ladies to make sure he was screwing into a main framing timber...

    yeah, maybe i got lucky, grew up in a mechanics workshop, always dirty, and my father died when i was 3 months old. i also wasnt allowed near a TV. it was books or nothing. university level physics and chemistry books, mind you...

    when i was in yr 3, noone would tell me why a small dc motor from a toy car SHOULDNT be stuck in the 240v AC power i worked it out for myself :) i was frustrated that i couldnt just buy mercury or potassium chlorate at the local chemist as a ten yr old.... strontium? i knew that made fireworks turn red, and sodium created yellow, while still at primary school. sometimes i wish i had concentrated on the maths side of it...

    yes, im still alive, i still have all my fingers, and while i can perform miracles for completely useless when it comes to working for myself, ie starting my own business from scratch. im lazy, unorganised, and scatterbrained :) i also find murphy ALWAYS rears his ugly head :jester:

    we all have our imperfections.

    i have been a foreman before. i got sick and tired of management always hiring people with no previous experience, no interest in what they do, and no freaking practical "interviews". easier to just be a grunt and not worry anymore. im not a ticketed welder, but i can get a job as a welder as long as there is a PRACTICAL test... most 5-6G/F welding work DEMANDS it, they dont care if you have no ticket, as long as your work passes the xray/destruction test... ive seen trade qualified people that couldnt change a tap washer or mow a lawn.and as for people that have been to uni and "know it all"...HA!

    sorry if i came across as arrogant. real life , i bite my lip and keep my mouth shut. let people work it out for themselves. more amusing that way :) its not me that has to tell them off, or fire them. unless they WILLINGLY WANT TO LEARN AND CAN THINK FOR THEMSELVES. then im the most helpful of people...

    dunno why, but ill stick to pouring my own concrete ;) ive learnt that when i want it done properly, only one person will...
  10. Bgnlb

    Bgnlb Member

    Ya I thought about solder,but didn't see as the best possible fix,with the vibration and tension.I'm just not a fan of the design,if it was get what you pay for. Inner tube was reccomended by local shop. I came up the self tapping screws,and conduit straps due to backbone shape on nerve cruiser. Thanks man
  11. HeadSmess

    HeadSmess Well-Known Member

    only reason i suggest solder is because you have had fuel in the tank already. doesnt need application of a flame or ignition source. the washer adds reinforcement, and galvanized ones just tin up better. can save on flux by just using HCL. (zinc n muriatic = flux)

    its always possible to wash em out, purge them with exhaust or inert gas. then braze, weld, whatever. some people dont think that far ahead... boom! (experience has taught me about performing the leak test first!)

    what amazes me is never having had an issue with the seam.

  12. Bgnlb

    Bgnlb Member

    Ya I figured braze would be more durable,but if you've had luck with spider I'll give a shot.galvy washer is a good idea you can get some material in there. What kind of solder you use
  13. Bgnlb

    Bgnlb Member

    Tank itself is OK,its the cheesy studs not being attached to gussetted area on the tank
  14. crassius

    crassius Well-Known Member

    to repair a tank

    first remove the bad stud and drill a hole in the tank at that spot

    run a length of safety wire thru the hole & out the filler neck

    put a steel washer, then a thick neoprene washer on a bolt, then attach the wire to the bolt & pull it thru the tank & out the hole

    put another neoprene washer on the bolt & another steel washer, then thread a nut onto the bolt

    now, double nut the end of the bolt so you can keep it from turning as you tighten the nut near the washers

    remove the double nuts and you're done with your repair

    I'd rather just buy a new tank tho and handle more carefully to prevent leaks
  15. Bgnlb

    Bgnlb Member

    Thanks for the info,but I'm gonna try solder 1st if that doesn't work I'll try your suggestion
  16. V 35

    V 35 Member

    * Real * motorcycles have elaborate tank mounts. The crappy tank that comes with kits leaves a few things a builder can do to increase reliability. The trick is to do the hot metalwork first, before the tank sees paint, or gas. Brazing the studs is smart, lead would be fine too. Heat metal, let cool, get in with wire brush and clean seam between stud and tank before brazing / soldering .
    Many builders give the tank seam a rub with JB weld, both as a sealer, and as a way to beautify seam . Simply filling the void between the stud, and the tank with JB Weld, is way better than nothing. For Mounting, I brazed the front tank mount, leaving the rear a strap on for easy service. My first bike had a nasty habit of the tank turning sideways, hence the welded mount. Small engine Air Cleaner Grommits [ sp ? ] have rubber bonded to a steel washer, fit stud, look very cool . Yes, don't over tighten studs, a squirt of paint will keep them from backing off.