Author Topic: Auxiliary Air Regulator (AAR), BMW #13 64 1 459 119  (Read 3160 times)

Offline schrocketeer

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Auxiliary Air Regulator (AAR), BMW #13 64 1 459 119
« on: October 15, 2025, 06:30:47 PM »
Grok (Twitter/X's AI tool) seems to think my '86 K100 has an Auxiliary Air Regulator (AAR). Am I missing something, or is Grok hallucinating?
It says cleaning/replacing the AAR may fix my "hold down Starter button to operate" issue.

Sunday I was able to ride it, holding the Starter button the entire time. Rather awkward. Video of that run available at https://www.facebook.com/marketplace/item/2932372703613840

  • North Alabama
  • 1985 K100RT very original
Ken  
Current: 85 K100RT, 09 DL650, 16 4RT260, 97 XR100, 70 CT70, 06 YFM400
Past Bikes: 86 K100RT, 85 K100RS, 07 SV1000S, 80 KL250, 99 GS1100, 85 K100RT, 86 VFR700, 91 XR250, 95 VLX600, 86 TRX250, 02 GZ250, 83 Z50R, 78 ATC90, 86 XR250, 79 XR500, 72 AT1, 75 YZ360, 78 DT400, 75 DT125, 73 Trail 70

Offline Laitch

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Re: Auxiliary Air Regulator (AAR), BMW #13 64 1 459 119
« Reply #1 on: October 15, 2025, 07:48:37 PM »
Ask Grok to explain itself. What does it do, Grok? Where do I find it, Grok? WTF, Grok? Are you serious, Grok?
Holding down the starter button can enrich the fuel mixture, so it would seem that the engine might be running too lean—one of the classic symptoms of air leakage into the intake air stream. Of course, defective electronic connections in the FICU or ICU could also cause lean running.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
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