BMW K75 Repair Manual page 61

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Engine
Specifications
Model
K75
!K75C
IK75S
K100
I
K 100 RslK 100 RT IK 100 LT
Sm all end bore
mm
20H7+0.021
0
Permissible weight difference
between connecting rods
9
±4
Cylinders
Cylinder bore
mm
A
67.00
±
0.005
B 67.01
±
0.005
Wearlimit
mm
A
67.05
B 67.06
Pistons
Piston weight
group,
complete
+ or
-
stamped on piston
Piston dia.
mm
Make:
KS
A
66.973
±
0.007
B
66.983
±
0.007
Wearlimit
mm
A
66.92
B
66.93
Piston
dia.
mm
Make:Mahle
A
66.970 ± 0.007
B
66.980 ± 0.007
Wearlimit
mm
A
66.92
B
66.93
Piston installed ciearance
mm
0.015
-
0.039
Wear limit
mm
0.130
Piston installed direction
Arrow on
crown
must face in forward
travel
direction
Piston rings
Rectangular-section ring
,
groove 1
Height
mm
1 2
-
0.010
.
-
0.022
Wearlimit
mm
1.10
Ring gap
mm
0.25
...
0.45
Wearlimil
mm
1.50
Ring flank clearance
Mahle
KS
mm
0.050
...
0.082 0.040 ... 0.072 0.013 ... 0.027
Wearlimit
mm
0.30
0.30
0.30
8.87
11-09.0

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