BMW R 1100 RT Repair Manual page 81

Technical Data
Valve seat ring
Valve seat angle
Inlet
Exhaust
Inlet
Exhaust
Valve seat width
Inlet
Wear limit
Exhaust
Wear limit
Valve seat extl. dia. (dimension for valve seat
machining)
Inlet
Exhaust
Inlet
Exhaust
Seat ring dia. (oversize +0.2 mm)
Inlet
Exhaust
Inlet
Exhaust
Seat dia. in cylinder head (oversize +0.2 mm)
Inlet
Exhaust
Inlet
Exhaust
R 850 R
45°
45°
± 0.15
mm (in) 1.1
± 0.00591
(0.04331
mm (in) 2.5 (0.09843)
± 0.15
mm (in) 1.4
± 0.00591
(0.05512
mm (in) 3.0 (0.11811)
± 0.1
mm (in) 31.4
± 0.003937
(1.23622
± 0.1
mm (in) 26.4
± 0.003937
(1.03937
mm (in)
mm (in)
mm (in) 34.634...34.650
(1.36254...1.36417)
mm (in) 30.134...30.150
(1.186378...1.18701)
mm (in)
mm (in)
mm (in) 34.500...34.525
(1.358268...1.359252)
mm (in) 30.000...30.025
(1.1811...1.18209)
mm (in)
mm (in)
R 1100 R
45°
30°
from 1996 mod. year on
45°
45°
± 0.15
1.1
± 0.00591
) (0.04331 )
2.5 (0.09843)
± 0.15
1.4
± 0.00591
) (0.05512 )
3.0 (0.11811)
± 0.1
35.2
± 0.003937
) (1.38583
± 0.1
30.3
± 0.00393
) (1.19291 )
from 1996 mod. year on
± 0.1
33.4
± 0.00393
(1.31496 )
± 0.1
28.4
± 0.00393
(1.11811 )
37.634...37.650
(1.48165...1.48228)
34.134...34.150
(1.34386...1.34449)
from 1996 mod. year on
36.617...36.633
(1.44161...1.44224)
32.134...32.150
(1.26512...1.26575)
37.500...37.525
(1.47638...1.47736)
34.000...34.025
(1.33859...1.33957)
from 1996 mod. year on
36.500...36.525
(1.43701...1.43799)
32.000...32.025
(1.25984...1.26083)
)
11.31