Rotax 912 i Series Maintenance Manual page 197

Description
1) Cylinder head
Diameter Intake CH01 7.006 mm
of Valve
Valve
Exhaust CH01 7.006 mm
guide
Valve
Width of Intake CH02 1.40 mm
Valve Valve
seat
Exhaust CH02 1.50 mm
Valve
Hardness CH08 85 HB
test
2) Valves
Diameter Intake VT01 6.965 mm
of Valve
Valve
Exhaust VT01 6.965 mm
stem
Valve
Backlash Intake CH01
Valve Valve /VT01
guide/
Exhaust CH01
valve
Valve /VT01
stem
Circularity Intake VT02 0.00 mm
of Valve
Valve disc
Exhaust VT02 0.00 mm
Valve
Wear on Intake VT03 0.00 mm
Valve disc Valve
Exhaust VT03 0.00 mm
Valve
Length of Intake VT04 32.40 mm
valve Valve
spring at
Exhaust VT04 32.40 mm
test force,
Valve
each
3.1) Rocker arm
Bore Intake CH05 12.000 mm
for rocker Valve
arm shaft
Exhaust CH05 12.000 mm
Valve
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Current measurement
value
min max
7.018 mm
0.2758 in. 0.2763 in.
7.018 mm
0.2758 in. 0.2763 in.
1.90 mm
0.0551 in. 0.0748 in.
2.00 mm
0.0591 in. 0.0787 in.
6.980 mm
0.2742 in. 0.2748 in.
6.980 mm
0.2742 in. 0.2748 in.
0.026 mm 0.053 mm
0.0010 in. 0.0021 in.
0.026 mm 0.053 mm
0.0010 in. 0.0021 in.
0.03 mm
0.0000 in. 0.0012 in.
0.03 mm
0.0000 in. 0.0012 in.
0.00 mm
0.0000 in. 0.0000 in.
0.00 mm
0.0000 in. 0.0000 in.
33.60 mm
1.2760 in. 1.3230 in.
33.60 mm
1.2760 in. 1.3230 in.
12.018 mm
0.4724 in. 0.4731 in.
12.018 mm
0.4724 in. 0.4731 in.
Tolerance Tolerance
limit limit
100 % 50 %
7.150 mm 7.084 mm
0.2815 in. 0.2789 in.
7.150 mm 7.084 mm
0.2815 in. 0.2789 in.
2.40 mm 2.15 mm
0.0945 in. 0.0846 in.
2.50 mm 2.25 mm
0.0984 in. 0.0886 in.
6.940 mm 6.953 mm
0.2732 in. 0.2737 in.
6.940 mm 6.953 mm
0.2732 in. 0.2737 in.
0.150 mm 0.102 mm
0.0059 in. 0.0040 in.
0.150 mm 0.102 mm
0.0059 in. 0.0040 in.
0.04 mm 0.035 mm
0.0016 in. 0.0014 in.
0.04 mm 0.035 mm
0.0016 in. 0.0014 in.
0.2 mm 0.1 mm
0.0080 in. 0.0040 in.
0.02 mm 0.01 mm
0.0080 in. 0.0040 in.
32.00 mm 32.20 mm
1.2600 in. 1.2680 in.
32.00 mm 32.20 mm
1.2600 in. 1.2680 in.
12.090 mm 12.054 mm
0.4760 in. 0.4746 in.
12.090 mm 12.054 mm
0.4760 in. 0.4746 in.
Measurements
Cyl Cyl Cyl
. 1 . 2 . 3
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
current
replaced
72-30-00
Page 19
July 01/2012
Cyl
. 4