I found the answer to my clutch plate question (what changed in 12/97)....Service Bulletin 2818 dated 04-14-98.
- The RT and GS pushrods should be same (same part number.)
- I ended up going with a siebenrock basic friction plate and upgrade the entire clutch pack with the post 12/97 version and am going to use an 1100 spring as I had no problems with it prior to this issue.
Hopefully parts will arrive soon and I can get the bike rolling again!
Thanks for the bump
RR
Topic:
New Clutch Parts
Details:
All R 850/R 1100 and K 1200 RS models produced from December 1997
have received a new clutch disc, manufactured by VALEO, and a
new pressure plate (see applicable part numbers below).
Earlier production for both series can be fitted with the new parts.
However, due to changes in specifications (a thicker pressure
plate, a thinner clutch disc), the new VALEO clutch disc is not
compatible with the old pressure plate. In this application, the
new clutch disc and pressure plate must be replaced as a
pair.
Series
Production:
R 850/R1100 models: Starting with December 1997 production.
K 1200 RS: Starting with December 1997 production.
Part Number:
R 850/R1100 Models: VALEO Clutch Disc: 21 21 2 325 864
Used only in conjunction with
Pressure Plate: 21 21 2 325 863
R 850/R1100 models: VALEO Clutch Disc with reduced play
on gearbox input shaft (KD - Scheibe): 21 21 2 325 862
Used only in conjunction with
Pressure Plate: 21 21 2 325 863
K 1200 RS: VALEO Clutch Disc: 21 21 2 332 973
Used only in conjunction with
Pressure Plate: 21 21 2 332 974
Attention:
For R 850/R1100 and K 1200 RS models with production dates of 12/97 and
later, all clutch parts can be replaced individually, as the new pressure plate
will already be installed.
On earlier production examples, installing the new VALEO clutch disc without
replacing the pressure plate will not allow the clutch to completely
disengage.