BMW R 1100 S Repair Manual page 56

Technical Data
Piston rings
1st groove Piston ring
asymmetric, convex oval
Thickness
Wear limit
End gap
Wear limit
Side clearance
Wear limit
2nd groove Micro-taper compression ring
Thickness
Wear limit
End gap
Wear limit
Side clearance
Wear limit
3rd groove 3 - S ring
Height
Wear limit
End gap
Wear limit
Side clearance
Wear limit
Installed direction of piston rings
Piston pin
Piston pin dia.
Wear limit
Bore in piston
Radial clearance in piston
Wear limit
11.10
R 1100 S
mm (in) 1.170...1.190 (0.0461...0.0469)
mm (in) 1.1 (0.04)
mm (in) 0.1...0.3 (0.004...0.012)
mm (in) 0.8 (0.03)
mm (in) 0.030...0.070 (0.0012...0.0027)
mm (in) 0.15 (0.006)
mm (in) 1.175...1.190 (0.0463 ...0.0469)
mm (in) 1.1 (0.04)
mm (in) 0.1...0.3 (0.004...0.012)
mm (in) 0.8 (0.03)
mm (in) 0.030...0.065 (0.0012...0.0026)
mm (in) 0.15 (0.006)
mm (in) 2.0 (0.078)
mm (in) 1.9 (0.075)
mm (in) 0.30...0.60 (0.012...0.024)
mm (in) 1.20 (0.047)
mm (in) 0.020...0.055 (0.0008...0.0022)
mm (in) 0.15 (0.006)
"Top" marking uppermost
mm (in) 21.995...22.000 (0.8664...0.8662)
mm (in) 21.960 (0.8646)
mm (in) 22.005...22.011 (0.8664...0.8666)
mm (in) 0.005...0.016 (0.0002...0.0006)
mm (in) 0.070 (0.0028)