BMW R 1200 C Repair Manual page 42

Technical data
Valves
Included angle between valves
Valve clearances with engine cold
(max. 35 °C/95 °F)
Inlet valve
Exhaust valve
Valve timing
Inlet opens
Inlet closes
Exhaust opens
Exhaust closes
Valve head dia.
Inlet
Exhaust
Stem dia.
Inlet
Wear limit
Exhaust
Wear limit
Valve head edge thickness
Inlet
Wear limit
Exhaust
Wear limit
Max. runout of valve head at valve seat
Inlet, exhaust
Valve seat ring
Valve seat angle
Inlet
Exhaust
Valve seat width
Inlet
Wear limit
Exhaust
Wear limit
Valve seat extl. dia. (dimension for machining seat)
Inlet
Exhaust
Seat ring dia. (oversize +0.2 mm/+0.008 in)
Inlet
Exhaust
Seat dia. in cyl. head (oversize +0.2 mm/+0.008 in)
Inlet
Exhaust
11.6
R 850 C
° 41
0.15 (0.006)
0.30 (0.012)
mm (in)
mm (in)
At zero valve clearance and 3 mm (0.12 in)
valve lift
17° after TDC
15° after BDC
15° before BDC
17° before TDC
Tolerance ± 3°
mm (in) 32 (1.26)
mm (in) 27 (1.06)
mm (in) 4.966...4.980 (0.1955...0.1960)
mm (in) 4.946 (0.1947)
mm (in) 4.956...4.970 (0.1951...0.1956)
mm (in) 4.936 (0.1943)
±0.2 ±0.008
mm (in) 1.00 (0.04
mm (in) 0.5 (0.02)
±0.2 ±0.008
mm (in) 1.00 (0.04
mm (in) 0.5 (0.02)
mm (in) 0.035 (0.0014)
45°
45°
± 0.15 ±0.006
mm (in) 1.1 (0.043
mm (in) 2.5 (0.10)
± 0.15 ±0.006
mm (in) 1.4 (0.055
mm (in) 3.0 (0.12)
±0.1 ±0.004
mm (in) 31.4 (1.24
±0.1 ±0.004
mm (in) 26.4 (1.04
mm (in) 34.634...34.650
(1.3635...1.3642)
mm (in) 30.134...30.150
(1.1864...1.1870)
mm (in) 34.500...34.525
(1.3583...1.3592)
mm (in) 30.000...30.025
(1.1811...1.1821)
R 1200 C
34 (1.34)
29 (1.14)
)
)
)
)
±0.1 ±0.004
) 33.4 (1.32 )
±0.1 ±0.004
) 28.4 (1.12 )
36.617...36.633
(1.4416...1.4422)
32.134...32.150
(1.2651...1.2658)
36.500...36.525
(1.4370...1.4380)
32.000...32.025
(1.2599...1.2608)