BMW R 1200 C Repair Manual page 46

Technical data
Piston rings
1st groove Piston ring
asymmetrical, convex oval
Height
Wear limit
Gap clearance
Wear limit
Side clearance
Wear limit
2nd groove Micro-taper compression ring
Height
Wear limit
Gap clearance
Wear limit
Side clearance
Wear limit
3rd groove Equal-chamfer ring + tubular spring
Height
Wear limit
Gap clearance
Wear limit
Side clearance
Wear limit
Installed direction of piston rings
Piston pin
Piston pin dia.
Wear limit
Bore dia. in piston
Radial clearance in piston
Wear limit
11.10
R 850 C
mm (in) 1.170...1.190 (0.0461...0.0469)
mm (in) 1.1 (0.043)
mm (in) 0.1...0.3 (0.004...0.012)
mm (in) 0.8 (0.031)
mm (in) 0.030...0.070 (0.0012...0.0027)
mm (in) 0.15 (0.0006)
mm (in) 1.170...1.190 (0.0461...0.0469)
mm (in) 1.1 (0.043)
mm (in) 0.2...0.4 (0.008...0.016)
mm (in) 1.0 (0.040)
mm (in) 0.030...0.070 (0.0012...0.0027)
mm (in) 0.15 (0.0006)
mm (in) 1.970...1.990 (0.0776...0.0783)
mm (in) 1.9 (0.075)
mm (in) 0.30...0.55 (0.012...0.022)
mm (in) 1.20 (0.047)
mm (in) 0.020...0.060 (0.0008...0.0024)
mm (in) 0.15 (0.0006)
"Top" marking uppermost
mm (in) 21.995...22.000 (0.8660...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 (0.0027)
R 1200 C