BMW R850 Maintenance Manual page 35

Check the Brake Rotors: Examine the brake disks for scoring and wear. BMW
specifies a minimum thickness of 4.5 mm (.17 inches) for the front rotors and 4.6 mm
(.18") for the rear rotor. Carefully examine the "rivets" which attach the front floating
disks to their carriers. These wear, and need to be replaced when worn. Each rotor is
mounted with two types - which may be identified as having a large hole or smaller hole
in the center of the "rivet." Each thicker rivet with a small hole is located between groups
of 3 of the thinner walled rivets with the larger holes. They affix with a small flat spring
washer and a circlip located on the inside (wheel side) of the disk.
Grease the Side Stand and Center Stand: Grease the side stand and center stand
(some models only). There is not much else to say about this service. Check that the
center stand bolts are tight. The torque specification is 15 foot pounds. (21 nm)
Adjust the Clutch: Adjust the cable adjuster located at the handlebar end of the cable
so that the distance (exposed threads) between the adjuster and the locking ring is
12mm (.47"). Then, at the rear of the transmission loosen the 13mm locknut and adjust
the 10mm adjusting bolt so that the freeplay distance measured between the handlebar
lever and its housing is 7mm (.28"). Freeplay is the distance the lever moves taking up
the slack in the adjustment prior to actually beginning to disengage the clutch. Then pull
the clutch lever in so that there is pressure on the 10mm bolt to hold it from turning, and
tighten the 13mm locknut - just snug but not gorilla tight. I have seen cases where the
locknut and adjusting bolt have loosened, so some blue Loctite 242 is appropriate at this
location. Lubricate the clutch cable ends by applying grease where the barrels on the
ends of the cables contact the clutch levers.
Synchronize the Throttle Bodies: Adjust the choke cable so there is approximately
1mm (.04") of free play in the cable. Rotate the handlebars fully to the right and adjust
the cable from the twistgrip to the left throttle body so that there is approximately .5mm
(.02") of free play in the cable. Using a mercury manometer (Carb Stix or equivalent)
adjust the adjuster at the right throttle body to synchronize it to the left throttle body with
the twist grip rotated so the engine is operating just above idle with no slack in the
cables. Adjust the idle speed and balance the throttle bodies at idle by rotating the brass
recirculating air screws on the upper rear of each throttle body. For more detailed
instructions see the synchronization instructions in the article entitle Zero=Zero by Rob
Lentini. If you have the new twin cable equipped engine, then synchronize by adjusting
the freeplay on both cables equally to approximately 1mm.
Lubricate the Lower Front Shock Mount: Remove the lower front shock mounting
bolt and the two black spacers which are located between the sides of the shock "eye"
and the mounting bracket on the Telelever arm. Clean the bolt, the spacers, and the
shock mount. Grease the shank of the bolt and apply a light smear of grease on both
sides of each spacer. Reassemble and tighten the bolt. The torque specification is 43
nm (32 ft. lbs) for the early RS's and 50nm (37 ft. lbs.) for the later RS's, GS,s and RT's.
Note - if your R1100 makes a strange clicking sound from the front end, it is likely that
the lower shock mount needs to be greased.
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