BMW C1 200 - Page 82

11.6
Valve guide
Inlet/exhaust inside diameter mm (in) 4.002…4.015 (0.1576…0.1581)
Wear limit mm (in) max. 0.5 (0.0197)
Projection mm (in) 9.8…10.2 (0.3858…0.4016)
Valve seat angle
Inlet ° 45
Exhaust ° 45
Included angle between valves
Inlet ° 16
Exhaust ° 18
Valve seat width
Inlet mm (in) 1.185…1.215 (0.0466…0.0478)
Wear limit mm (in) 2 (0.0787)
Inspection dimension mm (in) 1.0…1.4 (0.0394…0.0551)
Exhaust mm (in) 1.385…1.415 (0.0545…0.0557)
Wear limit mm (in) 2 (0.0787)
Inspection dimension mm (in) 1.2…1.6 (0.0472…0.0630)
Valve seat surface mm (in)
2
0.8 (0.0315)
Wear limit mm (in)
2
0.6 (0.0236)
Bucket tappets (wear limit)
Extl. dia. mm (in) 25.980…25.993 (1.0228…1.0239)
Radial play in cylinder head mm (in) 0.100 (0.0039)
Guide Ø in cylinder head mm (in) 26.007…26.008 (1.02389…1.02393)
Wear limit mm (in) 26.04 (1.0252)
Valve spring
When new (uncompressed) mm (in) 36.93 (1.4539) 41.0 (1.6142)
Wear limit mm (in) 36.7 (1.4449) 40.8 (1.6063)
Oil circuit bypass valve
Compression spring for pressure-re-
lief valve, uncompressed
mm (in) 13.5 (0.5315)
Wear limit mm (in) 13.4 (0.5276)
Pistons
Clearance, piston and cylinder new mm (in) 0.013…0.037 (0.0005…0.0015)
Wear limit mm (in) 0.060 (0.0024)
Piston diameter “A”
Installed dimension mm (in) 56.37 ± 0.005
(2.2193 ± 0.00002)
61.97 ± 0.005
(2.4398 ± 0.00002)
Piston diameter “B”
Installed dimension mm (in) 56.38 ± 0.005
(2.2197 ± 0.00002)
61.98 ± 0.005
(2.4402 ± 0.00002)
Technical Data C1 C1 200