Zenoah G430RC, Owner'S Manual

Page: 11 / 24

11
MAINTENANCE
3) MAINTENANCE SPECIFICATIONS
G430RC
Items Standard Limit Measuring Device Remarks
Bore (mm) ø40 Plating damaged Eye Checking
Diameter (mm) ø39.97 ø39.87 Micro Meter
Piston Ring
1.510 1.610 Thickness Gauge
Groove width (mm)
Piston Pin Hole (mm) ø10 ø10.05 Cylinder Gauge
Clearance between
Piston and 0.03~0.06 0.15
Cylinder (mm)
Clearance between
Groove and 0.010~0.10 0.15 Thickness Gauge
Piston Ring (mm)
End Gap (mm) 0.1~0.3 0.5 Thickness Gauge
Width (mm) 1.48 1.43 Micro Meter
Piston Pin Diameter (mm) ø10 ø9.98 Micro Meter
Connecting Rod Small end (mm) ø14 ø14.05 Cylinder Gauge
Crankshaft Dia. at Main Bearing (mm) ø17 ø16.96 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