BMW R 1100 S, Repair Manual

Page: 53 / 311

11.6
Technical Data R 1150 GS
Valves
Included angle between valves ° 41
Valve clearances with engine cold (max. 35
°
C/95 °F)
Inlet valve mm (in) 0.15 (0.006)
Exhaust valve mm (in) 0.30 (0.012)
Valve timing without valve clearance, 3 mm (0.12 in) valve lift
Inlet opens ° 1 after TDC
Inlet closes ° 25 after BDC
Exhaust opens ° 31 before BDC
Exhaust closes ° 13 before TDC
°
Tolerance
±
3
Valve head dia.
Inlet mm (in) 34 (1.34)
Exhaust mm (in) 29 (1.14)
Stem dia.
Inlet mm (in) 4.966 ... 4.980 (0.1955 ... 0.1960)
Wear limit mm (in) 4.946 (0.1947)
Exhaust mm (in) 4.956...4.970 (0.1951...0.1956)
Wear limit mm (in) 4.936 (0.1943)
Valve head edge thickness
Inlet mm (in) 1.00
± 0.2
(0.04
± 0.008
)
Wear limit mm (in) 0.5 (0.02)
Exhaust mm (in) 0.9
± 0.2
(0.003
± 0.008
)
Wear limit mm (in) 0.5 (0.02)
Max. runout of valve head at valve seat
Inlet, exhaust mm (in) 0.035 (0.0014)
Valve seat ring
Valve seat angle
Inlet ° 45
Exhaust ° 45
Valve seat width
Inlet mm (in) 1.1
± 0.15
(0.043
± 0.006
)
Wear limit mm (in) 2.5 (0.10)
Exhaust mm (in) 1.4
± 0.15
(0.055
± 0.006
)
Wear limit mm (in) 3.0 (0.12)
Valve seat extl. dia. (dimension for machining seat)
Inlet mm (in) 33.4
± 0.1
(1.32
± 0.004
)
Exhaust mm (in) 28.4
± 0.1
(1.12
± 0.004
)
Seat ring dia. (ov0.2 mm/+0.008 in)
Inlet mm (in) 36.617 ... 36.633 (1.4416 ... 1.4422)
Exhaust mm (in) 32.134 ... 32.150 (1.2651 ... 1.2658)
Seat dia. in cylinder head (ov0.2 mm/+0.008 in)
Inlet mm (in) 36.500 ... 36.525 (1.4370 ... 1.4380)
Exhaust mm (in) 32.000 ... 32.025 (1.2599 ... 1.2608)