Heidenau puzzler

Discussion in 'GS Boxers' started by navyrider, Feb 10, 2013.

  1. navyrider

    navyrider n00b

    Joined:
    Jul 19, 2007
    Oddometer:
    5
    I am having an issue with the rear tire on my GS Adventure. The tire, a newly mounted Heidenau ( tubeless) will not hold pressure when I run at interstate speed for an hour or so, it completely loses all pressure. The bike can sit and hold 40 lbs for 5 days or I can drop the pressure to 30lbs , ride dirt all day and no drop in pressure. I ran the pressure up to 40lbs , sprayed windew on valve stem, around the rims and no bubbles. This senario has happened two times within the the last 3 weeks.

    Could the problem be related to when the tire heats up, at this point I am just guessing. Thoughts will be appreciated. Thanks !!!!!
    #1
  2. SocalRob

    SocalRob Long timer

    Joined:
    May 23, 2006
    Oddometer:
    19,441
    Location:
    Los Angeles @ base of Angeles Crest Hwy
    Sounds very unsafe to me. I would send Heidenau an email. I think they should replace the tire.

    And, really look over the valve stem. Any chance of a crack that is opening up at speed? Personally, I run steel valve stems.
    #2
  3. ultane

    ultane sqeezin the bag

    Joined:
    Feb 20, 2008
    Oddometer:
    1,324
    Location:
    The dry side of the blood brain barrier
    Use steel valve stem caps with the rubber insert so that they form an airtight seal when screwed down securely on the valve stem. Otherwise the centrifugal force of the wheal spinning can open the schrader valve enough to let air escape when at highway speeds.




    Sent from my party line rotary dial iPhone using Tapatalk
    #3
  4. Yeahbaby

    Yeahbaby Adventurer

    Joined:
    Jan 29, 2008
    Oddometer:
    77
    Location:
    Vancouver USA
    Have you checked the valve stem itself. This year on the highway north from Yakima, I was running normal speeds minding my own business. I had a sudden deflation of a brand new tire. WTF, When I stopped I could find no nail or punctures. Couldn't figure it out. When I brushed my hand against the valve stem, voilà. Found the problem. Not a split or tear on the valve stem rubber a one would think. The metal stem de-vulcanized from the surrounding rubber. With the remaining air in the tire, it actually was spit out on to the ground. Yes, I have witnesses! Try to explain that one. So for now on, every 2nd tire will get a new valve stem.
    #4
  5. Okie Preacher

    Okie Preacher Long timer

    Joined:
    Aug 11, 2010
    Oddometer:
    1,100
    Location:
    In the middle...
    I recently read a random post regarding air loss on the Heidenau's when mounted on spoke wheels (as opposed to the stock cast GS rims). Something about a slightly different set of dimensions at the point where the bead sits.

    Might be a rabbit trail...might be something to look into.
    #5
  6. funinthesun

    funinthesun Been here awhile

    Joined:
    Oct 30, 2009
    Oddometer:
    283
    Location:
    so cal
    best thing to do is to put 60 psi or so and submerge the entire wheel and tire and look for bubbles. a large container with water and roll the wheel around with the rim and tire under and find the leak. by increasing the pressure it will simulate the conditions of heat and stress when on the road. or take it to where it was installed they should do the same thing.
    #6
  7. FatChance

    FatChance Road Captain

    Joined:
    Jun 12, 2003
    Oddometer:
    11,910
    Location:
    Flagstaff, Arizona
    It could be a problem with the bead seating properly on the rim. Try breaking the bead, rotating the tire on the wheel a little bit and reseting the bead...
    #7
  8. rgb2cmyk

    rgb2cmyk Been here awhile

    Joined:
    Nov 19, 2010
    Oddometer:
    255
    Location:
    'boken, NJ
    I'm one of the people who've had issue with the slow leak on Heidenau's. But it's always been the front wheel on spokes that's the issue, and especially acute when off road where I could lose 20psi in a couple hours if that, yet ride home without issue.

    This might be related, but I'd spend a little more time on the valve stem before chocking it up to the same slow leak that other's have experienced because this sounds a little different.
    #8
  9. PaulGinAZ

    PaulGinAZ FNG

    Joined:
    Jul 28, 2007
    Oddometer:
    272
    Location:
    Chandler, Arizona
    Is it the front or rear (or both) that is causing the issue?

    I had a problem with a front K60 on my spoked wheel 2007 R1200GS that would cause the tire to lose just about all of its' air pressure within an hour or so of riding on the street. It turned out that there was a seating procedure that Moto-Amore' (the distributor of Heidenau in the US) ended up revising and sending out after a rash of these failures started to crop up.

    With a fresh new tire you are supposed to seat the tire at 60 PSI and then ride around roughly a mile at low speeds and then reduce your tire pressure to the appropriate amount. I found that the bead on these tires is so hard that the slight flat spot that shows up on every spoked wheel where they weld the rim together doesn't allow proper seating if you just pump them up to 34 PSI and then roll forward after your initial mounting.

    After I contacted Moto Amore' about my issue they suggested that I dismount the tire, remount the tire after inspection and then try what I outlined above after careful inspection of the rim bead. You may want to scuff up the area around the flat spot and see if that helps along with a little bit of silicone sealant on that area as well.

    My tire now stays within a few PSI every week and that is good enough for me considering how strong the sidewall is on these tires.

    Hope that helps. :freaky
    #9
  10. B-Nice

    B-Nice Adventurer

    Joined:
    Feb 10, 2013
    Oddometer:
    23
    Location:
    Memphis, TN
    Thanks NavyRider for the putting this question out there. I replaced the valve stem and put a step cap with a rubber washer insert and I will see how it works. I am on my third set of Heidenau K60's and this is the only problem I have encountered so far. Otherwise, they have been AWESOME!
    #10
  11. mikerd400

    mikerd400 Long timer

    Joined:
    Jan 29, 2006
    Oddometer:
    1,885
    Location:
    Sacramento
    I had a set of Heidenaus mounted last year and my front would lose pressure. The tire was defective. The bead had a couple of imperfections, which would not seal on the rim. I used soapy water on the tire and the bead to find the leaks.
    #11
  12. koenig

    koenig Been here awhile

    Joined:
    Aug 11, 2009
    Oddometer:
    124
    Location:
    Hiding in the shed South Australia
    Funny this should come up now. Jumped on the bike the other morning, flat rear tyre. Inflated the tyre dropped it into the horse trough and found it leaking around the bead. This tyre has done 14000kms without a problem. Go figure. Otherwise a great Hiedenau fan. Wonder what the new Metzlers will be like. (I like elephants)
    #12
  13. gsd4me

    gsd4me 90% bluff

    Joined:
    Dec 11, 2005
    Oddometer:
    8,037
    Location:
    Brisbane, Australia
    I would be concerned. Mitas has recalled all 2011 and 2012 production of 19 inch tubeless E07 tyres as they can suddenly lose all air pressure. I had one fitted, fell off and busted my leg.

    Not saying Heidenau has the same problem, but if it keeps losing air as you say, I would'nt be riding on it.
    #13
  14. koenig

    koenig Been here awhile

    Joined:
    Aug 11, 2009
    Oddometer:
    124
    Location:
    Hiding in the shed South Australia
    gsd4me; wonder if your avatar and my avatar would like each other.:evil Bit off topic but funny anyway.:lol3
    #14
  15. stevie88

    stevie88 That's gotta hurt

    Joined:
    Jan 29, 2005
    Oddometer:
    27,644
    Location:
    Texas, I know, right?
    This thread is going to the dogs.
    #15
  16. seniorasi

    seniorasi Banned

    Joined:
    Mar 23, 2009
    Oddometer:
    816
    Location:
    Edge of the light
    I would think the opposite is true! CF would cause the valve to seat more fully.
    #16
  17. marcus-st12

    marcus-st12 frenchy

    Joined:
    Jul 24, 2008
    Oddometer:
    217
    Location:
    Ottawa, ONT,CANADA
    My buddy had a rear heidenau replaced by the company cause it leaked air thru the sidewall itself....little bubbles coming thru the sidewall. They replaced the tire.
    #17
  18. feldjäger

    feldjäger Been here awhile

    Joined:
    Jun 11, 2012
    Oddometer:
    131
    Location:
    Las Vegas, NV

    Had this happen to me as well. Not fun forking out money for a new tire either.
    #18
  19. scooteraug02

    scooteraug02 Dog Rancher

    Joined:
    Feb 18, 2003
    Oddometer:
    4,576
    Location:
    Atlanta, GA
    #19
  20. Bruz

    Bruz Adventurer

    Joined:
    Feb 27, 2012
    Oddometer:
    56
    Location:
    NSW/ACT Australia
    Thanks for this info Guys. My complaint is similar. New bike and now new Hidenau. Looses pressure at higher speeds. Ie at 140 k burst dropped from2.0 bar down to 1.6. Will go pull it apart and see what I can find!:evil
    #20