BMW R 1200 C Repair Manual page 45

Technical data
Connecting rod
Bore dia. for big end bearing
Big end bearing dia.
Radial clearance
Wear limit
Width of big end bearing eye
Conrod end float
Wear limit
Small end bearing bore dia.
Radial clearance
Wear limit
Distance between centers
Max. deviation from parallel of conrod bores
at 150 mm (5.90 in) spacing
Cylinders
Bore
A
Wear limit
B
Wear limit
Total wear clearance of piston and cylinder
Permitted out-of-roundness of cylinder bore
20 mm (0.79 in) from the top edge
100 mm (3.94 in) from the top edge
Pistons
Piston dia.
A
Wear limit
B
Wear limit
AB
Wear limit
Installed clearance
Total wear clearance of piston and cylinder
Piston pin bore dia.
Weight classes
Weight difference in one class
Direction of installation
R 850 C
mm (in) 51.000...51.013 (2.0079...2.0084)
mm (in) 48.016...48.050 (1.8904...1.8918)
mm (in) 0.025...0.075 (0.0010...0.0030)
mm (in) 0.13 (0.0051)
mm (in) 21.883...21.935 (0.8616...0.8636)
mm (in) 0.130...0.312 (0.0051...0.0123)
mm (in) 0.5 (0.02)
mm (in) 22.015...22.025 (0.8667...0.8671)
mm (in) 0.015...0.030 (0.0006...0.0012)
mm (in) 0.06 (0.002)
mm (in) 125 (4.92)
mm (in) 0.07 (0.003)
(20 mm/0.79 in from top edge)
mm (in) 87.492...87.500
(3.4446...3.4449)
mm (in) 87.550 (3.4468)
mm (in) 87.500...87.508
(3.4449...3.4452)
mm (in) 87.558 (3.4471)
mm (in) 0.12 (0.005)
mm (in) 0.03 (0.0012)
mm (in) 0.04 (0.0016)
(Measuring plane A — see Checking pistons and
cylinders
mm (in) 87.465...87.477
(3.4435...3.4440)
mm (in) 87.390 (3.4405)
mm (in) 87.477...87.485
(3.4440...3.4443)
mm (in) 87.400 (3.4409)
mm (in) 87.473...87.481
(3.4438...3.4441)
mm (in) 87.395 (3.4407)
mm (in) 0.011...0.035
(0.0004...0.0013)
mm (in) 0.12 (0.005)
mm (in) 22.005...22.011 (0.8664...0.8666)
+ and —
grammes
(oz) 10 (0.353) (complete with pins and rings)
Arrow on piston crown pointing to exhaust side
Production locating point towards exhaust side
(see Installing piston)
R 1200 C
100.992...101.000
(3.9761...3.9764)
101.050 (3.9784)
101.000...101.008
(3.9764...3.9768)
101.058 (3.9787)
100.971...100.983
(3.9753...3.9758)
100.895 (3.9723)
100.983...100.995
(3.9753...3.9763)
100.905 (3.9727)
100.979...100.987
(3.9756...3.9759)
100.900 (3.9725)
0.005...0.029
(0.0002...0.0011)
11.9