Rotax 912 i Series Maintenance Manual page 221

Current measurement
Description
Backlash bet- PI06 0.020 mm
ween piston 0.0008 in.
ring groove
and oil scra-
per ring 3
Piston ring PI07 0.15 mm
end, rectan- 0.0059 in.
gular piston
ring 1
Piston ring PI08 0.15 mm
end, conical 0.0059 in.
compression
ring 2
Piston ring PI09 0.15 mm
end, oil scra- 0.0059 in.
per ring 3
2) Cylinder
D1 CY01 84.000 mm
3.3071 in.
Cylin-
D2 CY02 CY01 +0.015 mm
der bore
CY01 +0.0006 in.
A
84 mm /
D3 CY03 CY01 +/- 0.008 mm
3.3 in.
CY01 +/- 0.0003 mm
D1 CY01 84.012 mm
3.3075 in.
Cylin-
D2 CY02 CY01 +0.015 mm
der bore
CY01 +0.0006 in.
B
84 mm /
D3 CY03 CY01 +/- 0.008 mm
3.3 in.
CY01 +/- 0.0003 mm
Cylinder ova- 0.0000 mm
lity 0.0000 in.
Cylinder cone 0.0000 mm
0.0000 in.
Post-machi- 0.0000 mm
ning of 0.0000 in.
sealing sur-
face/cylinder
head
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Tolerance
value
min max 100 %
0.055 mm 0.100 mm
0.0022 in. 0.0039 in.
0.35 mm 1.00 mm
0.0138 in. 0.0394 in.
0.35 mm 1.00 mm
0.0138 in. 0.0394 in.
0.40 mm 1.00 mm
0.0157 in. 0.0394 in.
84.012 mm 84.080 mm
3.3075 in. 3.3102 in.
CY01 +0.015/-0.008 mm
CY01 +0.0006/
-0.0003 in.
CY01 +0.020/-0.008 mm
CY01 +0.0008/-
0.0003 in.
84.024 mm 84.090 mm
3.3080 in. 3.3106 in
CY01 +0.015/-0.008 mm
CY01 +0.0006/-
0.0003 in.
CY01 +0.020/-0.008 mm
CY01 +0.0008/-
0.0003 in.
0.007 mm 0.050 mm
0.0003 in. 0.0020 in.
0.030 mm 0.060 mm
0.0012 in. 0.0024 in.
0.0000 mm 0.03 mm
0.0000 in. 0,0012 in.
Tolerance
limit limit
50 %
0.078 mm current
0.0032 in. replaced
0.68 mm current
0.0266 in. replaced
0.68 mm current
0.0266 in. replaced
0.70 mm current
0.0276 in. replaced
84.046 mm current
3.3089 in. replaced
current
replaced
current
replaced
84.057 mm current
3.3093 in. replaced
current
replaced
current
replaced
0.029 mm current
0.0011 in. replaced
0.045 mm current
0.0018 in. replaced
current
replaced
Measurements
Cyl. Cyl. Cyl. Cyl.
1 2 3 4
72-30-10
Page 13
July 01/2012