Results 1 to 8 of 8

Thread: R1100rs Front Fender Melting

  1. #1
    Registered User skotlyc's Avatar
    Join Date
    Dec 2011
    Location
    Wolcottville, IN
    Posts
    55

    R1100rs Front Fender Melting

    Any of you out there have the problem of your front fender melting from the exhaust heat? Is this normal?

  2. #2
    . AntonLargiader's Avatar
    Join Date
    Jul 2004
    Location
    Charlottesville, VA
    Posts
    1,368
    I don't see how that can happen unless you are letting the bike run while standing still for extended periods of time. I have never seen that, although I have seen scorched lower fairings on RTs and RSLs.

    Are you warming the bike up before you ride? Don't.
    Anton Largiader 72724
    largiader.com bmwra.org

  3. #3
    Registered User skotlyc's Avatar
    Join Date
    Dec 2011
    Location
    Wolcottville, IN
    Posts
    55
    Nope... Dont warm the bike up. Fire it up and start riding immediately. It was bubbled when I got it, but I'm pretty sure Its gotten worse.

  4. #4
    . AntonLargiader's Avatar
    Join Date
    Jul 2004
    Location
    Charlottesville, VA
    Posts
    1,368
    Post a pic. Seems to me the stock fender (rear half) is short enough that this shouldn't happen. You might have a different part installed.
    Anton Largiader 72724
    largiader.com bmwra.org

  5. #5
    Registered User roger 04 rt's Avatar
    Join Date
    Oct 2011
    Location
    Massachusetts
    Posts
    1,269
    +1 on the photo request.

    If the engine is misfiring, the charge could burn in the exhaust header, possibly? Is something wrong with the exhaust valve timing? How about a hole in the exhaust header or gasket allowing exhaust air to stream toward the fender.

    I'd say too lean a mixture but the highest exhaust temperature occurs at the stock mixtures.

  6. #6
    Registered User roger 04 rt's Avatar
    Join Date
    Oct 2011
    Location
    Massachusetts
    Posts
    1,269
    Quote Originally Posted by skotlyc View Post
    Nope... Dont warm the bike up. Fire it up and start riding immediately. It was bubbled when I got it, but I'm pretty sure Its gotten worse.
    How about this thought. The prior owner idled it for long periods and the plastic has bubbled toward the exhaust headers enough that they are too close. Or the material was damaged from prolonged idle and is now more susceptible.

    When I got my RT it had been idled enough to deform the plastic slightly around the cylinder heads. That set up internal stresses that allowed the inner attachment to fracture by the base of the cylinder head.

    I've noticed that even after a couple minutes the effect of radiated heat is quite noticeable.

  7. #7
    IBA #44567 Ken F's Avatar
    Join Date
    Sep 2009
    Location
    SW, MO
    Posts
    1,194
    I have a fender extender that was added to my RSL. It has deformed slightly from heat, but I"m pretty sure it has happened doing throttle-body sync's.

    I straightned it with a heat gun.

    Ken
    IBA #44567
    "Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
    -Albert Eienstein

  8. #8
    Nickname: Droid
    Join Date
    Jun 2005
    Location
    Green Bay, WI
    Posts
    2,352
    I have had a fender extension on my 94RS since day one. Never melted or deformed from heat, including sitting in Chicago freeway traffic. Still riding the same bike now and no melted fender issue.

    I also never "warm up" my RS, haven't since day one in Oct 94. Bike is not even started until I am sitting on it ready to go. I may on ocassion start it while seated on it, then pull my gloves on, and go. But no need whatsoever for any extended warmup.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •