Beware the inverted nipple.

Discussion in 'GS Boxers' started by Mike Ryder, Mar 27, 2013.

  1. vagueout

    vagueout Long timer

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    This is a timely post for me in that one of these stems failed on my rear two days ago when i was re-inflating my tyres coming off dirt roads back onto sealed, STRANDED not a freaking thing i could do, however able to phone my brother who lucky for me lived an hour away and has a pick-up. We eventually got the bike to a shop on closing time, whipped the wheel off and the bloke pressed the bead in with a tyre change machine cut the old valve stem out, pressed the new and i was back in action. I do all my own maint. and strive for reliability and longevity and this failure disturbs me in that such a simple thing can leave you as well as dead in the water. Spent some time that night checking out you tube for ways to fit a new stem on the road and never found anything really convincing. Further searching the net turned up the angled metal bolt on stems that seem to be popular. Yesterday i spoke to a bike tyre fitter , his opinion is that the oe rubber items rarely fail and that a new rubber stem fitted at every new tyre change would guarantee no failures. Went on to say that in his opinion the metal units were a waste of money (and he sells them). Curious to hear anybody's take on this whole topic of broken stems, possible roadside fix, metal stem????:*sip*
    #21
  2. Mike Ryder

    Mike Ryder Kriegerkuh

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    That very disturbing failure is why I change mine almost every tire change.
    I mangle them a bit to see if they will tear first. Have not had one tear this way
    yet. These are not expensive parts and not hard to replace. [Well, unless I do it]...
    #22
  3. openboatt

    openboatt Don't harsh my mellow

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    Putting new tires on the old GS in the next couple weeks. Thanks for reminding me new stems (correctly installed...hopefully) are a good idea. See? Some good comes from every brain fart... t
    #23
  4. JimVonBaden

    JimVonBaden "Cool" Aid!

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    He is right, sort of. On a car you change it every 40K miles, and they pretty much never fail. Changing it on the bike every time will cost more than a set of metal stems. The 90° stems have the added benifit of easier access. They may never need changing as the rubber is not exposed to the elements. IMHO, worth the cost.

    Jim :brow
    #24
  5. vagueout

    vagueout Long timer

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    Ordered a pair last night.:thumb
    #25
  6. Spaggy

    Spaggy Long timer

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    Hey, Isn't that an upskirt picture of Chaz Bono?
    #26
  7. kimzx1000r

    kimzx1000r Been here awhile

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    Is there where the term "air head" comes into play?
    #27
  8. sdpc2

    sdpc2 Just another Rally Rat

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    Btw. Where is everyone finding the best deal for new stems? The local dealer seemed rather pricey
    #28
  9. trc.rhubarb

    trc.rhubarb ZoomSplat!

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    I bought the metal ones because it's easier to check pressure and fill with the compressor in my garage. This leads to checking more often which is a good thing :D
    #29
  10. SocalRob

    SocalRob Long timer

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    I had a stem fail out on a road trip in the desert about 2 weeks after a dealer changed it out with new tires. I figure the tech cut it pulling it through the rim. Lucky for me a Honda dealer was 1/2 mile away and they stayed open to change it out.

    Had a second stem fail, let air out pretty quick at 85mph on a sweeper transition freeway bridge that I did not want to go over the wall on.

    I now run metal stems. Cost me $2.50 for a pair at Pep Boys. Screw that kind of failure.:lol3

    My Ducati came standard with metal stems.
    #30
  11. trailrider383

    trailrider383 867-5309

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  12. TUCKERS

    TUCKERS the famous james

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    I put the fork legs and wheel and brake caliper back on my DR650 after completing the factory lower job and was very pleased with myself.

    Two days later I found the rubber fork gaiters on the shelf!
    #32
  13. def

    def Ginger th wonder dog

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    Chromed brass stems both front and rear with nice matching chrome metal gasketed caps. Never leak and my tire pressures now rarely vary from week to week. Previously, I had to air up both tires about every 10 days.

    I would speculate that the rubber ones squirm around some at high speeds and leak a bit.

    But, they weigh more than the rubber ones.....
    #33
  14. tom28734

    tom28734 Adventurer

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    Aaaarrrrrgggghhhhh!!! "Inverted nipple" sounds ALIEN! :rofl
    #34