BMW Motorcycle R1100/850 Operations pdf
Service Bulletin Subject: R1100/850 Model Throttle Cables Problem: Engine surges at constant speed. Difficult to adjust and balance the left and right throttle bodies. Cause: Differences in opening and closing of the throttle butterflies caused by friction in the throttle cable. Remedy: 1. Fit a low friction throttle cable. 2. Check the following to ensure optimum results: Ignition timing Spark plugs (FR 6DDC) type / condition (reference SI 2739 in Main Group 12) Valve clearances Correct Cat. code plug Check throttle housing inlet manifold for air leaks
3. Synchronize the throttle butterflies as illustrated on the attached procedure. Note: Make sure there are no obstructions in the vacuum stub pipe prior to connecting the Synchro tool.
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