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BMW R1100S structural problems?

Discussion in 'Bike Reviews, Questions and Suggestions' started by mjt57, Feb 14, 2006.

  1. I'm wondering if any of you guys have heard of any problems with BMW's R1100S sports tourer model.

    On the weekend a mate's subframe snapped off at all mounting points. When it happened, the bike veered wide as he was going into a tight corner. By the time he was able to hit the picks and wash off speed he hit the bank at around 10 km/h.

    To look at the bike, you'd swear that it was perfect. No scratches in the fairing, etc. Only visible signs of problems was the leaking rocker cover where it did an "oggy knob" as the bike impacted the earth of the bank.

    The subframe holds up the seat, rear cowl, etc. The only thing that stopped it dropping away altogether was that the underseat exhaust was bolted to the sub-frame and was holding it up.

    He had a gearsack rack and a reasonably loaded gearsack (clothes, shoes, etc.) so the load wasn't that great. Mind you, BMW fitted it prior to sale and the thing's designed to have panniers fitted.

    It'll be interesting to see what BMW will do about this.

  2. Known problem with Beemers and the subframe when loading it up with panniers.

    I know it more specifically with the 1150GS, but standard rule is the subframe needs to be reinforced to carry any form of luggage.
  3. Really?

    What about pillions? Surely the subframe should be able to take a reasonable amount of weight.
    For the subframe to fail just through the addition of some luggage sounds a bit suspect.
  4. Where the failure occured, the structural points are not very substantial at all. It's like a shear pin on a mechanical drive, for example. It looks like it was designed to break, rather than to be a point of loading.

    The bike's designed to take panniers, as well as a pillion. It's a dual seat sports tourer, after all. If it was say, a sports bike homologated for Superbike racing and intended for 60 kg riders, then yeah, you might have a point.

    It'll be interesting to hear what BMW has to say about it.