Join Date: Jun 2008
Location: Sydney, NSW, Australia
Re: Help please with BMW R1100 RS fault
The throttle body boxer models are prone to wear where the shaft goes through the alloy housing ,because the butterfly is a precision fit in the throttle body any missalignment will cause sticking and uneven response flat spots poor uneven idling etc.
Fix is either replace with new or have a carburetor repair specialist rebush the throttle spindle bore,this could also be done by an acomplished machinist or even a good home machinist such as found building some of those amazing working model trains