Zenoah G320RC - MAINTENANCE; MAINTENANCE SPECIFICATIONS

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MAINTENANCE
3) MAINTENANCE SPECIFICATIONS
G320RC
Items Standard Limit Measuring Device Remarks
Bore (mm) ø38 Plating damaged Eye Checking
Diameter (mm) ø37.97 ø37.87 Micro Meter
Piston Ring
1.01 1.11 Thickness Gauge
Groove width (mm)
Piston Pin Hole (mm) ø9.01 ø9.05 Cylinder Gauge
Clearance between
Piston and 0.03~0.06 0.15
Cylinder (mm)
Clearance between
Groove and 0.02~0.04 0.1 Thickness Gauge
Piston Ring (mm)
End Gap (mm) 0.1~0.2 0.5 Thickness Gauge
Width (mm) 0.98 0.93 Micro Meter
Piston Pin Diameter (mm) ø9 ø8.98 Micro Meter
Connecting Rod Small end (mm) ø12 ø12.05 Cylinder Gauge
Crankshaft Dia. at Main Bearing (mm) ø12 ø11.98 Micro Meter
Eccentricity (mm) — 0.07 Dial Gauge
Axial Play (mm) — 0.5 Thickness Gauge
Gritty orr
Main Bearing — —
Feels Flat Spot
At the skirt end and
the right angle to the
piston pin.
When inserted in
a new cylinder.
Piston
Cylinder
Piston
Ring
Micro Meter
Cylinder Gauge