BMW R850 Maintenance Manual page 59

Donelson Cycles Inc. at 800-325-4144 was selling the Motion Pro brand for $34.45
including shipping in 1996.
Ask you favorite cycle shop or mail order company for their price.
If the mercury comes out of the reservoir (because it tipped over or the cat hit it), you
can get it from Chaparral Motorsports 1-800-841-2960 part# 315-0441 for $9.99.
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Glossary:
RSCSC - Right side crossover synch cable ['97- right throttle cable].
On the right side of the bike, forward of the fuel injection plugs and between the
engine and the throttle body, you will find this vertical cable. The cable is secured on a
bracket with a lock nut on the bracket and a knurled knob above the lock nut. After
loosening the lock nut, turning the knurled knob will either lengthen or shorten the cable.
If the top of the cable is pulled gently up, it should come out of the knurled knob. This is
the mechanism that must be adjusted to vary the mercury columns.
LBBS - Large Brass Bypass Screw:
On the right side of the bike, on the outer surface of the throttle body tube is a
large brass bypass screw with a slotted (NOT Phillips) head that faces toward the rear of
the bike. If you were to place a screwdriver on the screw, the handle of the screwdriver
would point toward the right rear turn signal. This large brass bypass screw is
approximately one inch forward of the black plastic air intake tube. You are looking for it
on the right side because it is easier to locate there; there are fewer things in the way.
You can see the large brass bypass screws easily when standing near the turn signals.
If you look on the left side, you will find a similar
large brass bypass screw. The official BMW Repair Manual calls this a "recirculating air
screw" at page 00.27.
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Note: The throttle cables on many 1994-96 bikes were replaced with Teflon coated units
(warranty service bulletin #2748 dated 7/3/96) because the inner cable was sticking.
The improved cable was installed at the factory after the following VIN number:
R1100RS 0312537
R1100GS 0381479
R1100R 6379238
R1100RT 0440499
R850 from start of prod.
If the older type is installed on your bike, and if it has not been replaced, see your dealer
because some older cables caused significant balancing problems.
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Author's note: I tape new throttle cables open to speed-up stretching and break in. The
original throttle body synch work by Jon Diaz can be found at
http://www.ibmwr.org/rtech/R11-throttle-sync.html Bob Gorman's original throttle body
synch work appeared in a local newsletter and the original tune-up manual.
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