Zenoah AIR G26 Instruction Manual page 10

Engine Care and Maintenance
Maintenance Specifications
Items
Cylinder
Bore (mm)
Diameter (mm)
Piston Ring
Groove Width (mm)
Piston
Piston Ring Hole (mm)
Clearance between Piston
and Cylinder (mm)
Clearance between Groove
and Piston Ring (mm)
End Gap (mm)
Piston
Ring
Width (mm)
Piston Pin Diameter (mm)
Connecting Rod small end (mm)
Crankshaft Dia. at Main Bearing (mm)
Eccentricity (mm)
Axial Play (mm)
Main Bearing
10
Standard Limit
ø34 Plating damaged
ø33.97 ø33.87
1.01 1.11
ø8.01 ø8.05
0.03–0.05
0.15
0.02–0.04 0.1
0.05–0.25
0.5
0.98 0.93
ø8 ø7.98
ø11 ø11.05
ø12 ø11.98
––
0.07
–– 0.5
Gritty or
––
Has Flat Spot
(continued)
Standard Limit
ø32 Plating damaged
ø31.87
ø31.97
1.01 1.11
ø8.01 ø8.05
0.03–0.05 0.15
0.02–0.04 0.1
0.05–0.25 0.5
0.98 0.93
ø7.98
ø8
ø11.05
ø11
ø12 ø11.98
–– 0.07
0.5
––
Gritty or
––
Has Flat Spot
Measuring Device Remarks
Eye Checking
At the skirt end and
the right angle to the
Micro Meter
piston pin
Thickness Gauge
Cylinder Gauge
Micro Meter
Cylinder Gauge
Thickness Gauge
When inserted in a
Thickness Gauge
new cylinder
Micro Meter
Micro Meter
Cylinder Gauge
Micro Meter
Dial Gauge
Thickness Gauge
––