LONCIN G120F User Manual

G120F/G160F/G200F Part II Description of maintenance
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2-2 Maintenance standards
G120F
G120F
Part Item
Standard Service limit
Engine Maximum speed
3850±150rpm
--
Cylinder Cylinder bore 60.0mm 60.165mm
Cylinder head
Warpage -- 0.10mm
Piston
Skirt OD
Piston-to-cylinder clearance
Piston pin bore ID
Piston pin OD
Piston pin-to-piston pin bore clearance
59.985mm
0.015-0.050mm
13 .002mm
13.0mm
0.002-0.014mm
59.845mm
0.12mm
13.048mm
12.954mm
0.08mm
Piston ring
Ring side clearance Top/second/oil
Ring end gap: Top/second
/oil
Ring width: Top/second/
/oil
0.015-0.045mm
0.2-0.4mm
0.15-0.35mm
1.5mm
2.5mm
0.15mm
1.0mm
1.0mm
1.37mm
2.37mm
Connecting
rod
Small end ID
Big end ID
Big end oil clearance
Small end side clearance
13.005mm
26.02mm
0.040-0.063mm
0.1-0.7mm
13.07mm
26.066mm
0.12mm
1.1mm
Crankshaft
Crankshaft OD 25.98mm 25.92mm
Valves
Valve clearance IN
EX
Stem OD IN
EX
Guide ID EX/IN
Valve lifter clearance IN
EX
Seat width
Spring free length
0.15±0.02mm
0.20±0.02mm
5.48mm
5.44mm
5.50mm
0.02-0.044mm
0.06-0.087mm
0.8mm
30.5mm
--
--
5.318mm
5.275mm
5.572mm
0.1mm
0.12mm
2.0mm
29.5mm
Camshaft
Cam height IN
EX
Camshaft OD
27.7mm
27.75mm
13.984mm
27.45mm
27.50mm
13.916mm
Crankcase
cover
Camshaft holder ID 14.0mm 14.048mm
Spark plug
Gap 0.7-0.8mm --
Ignition coil
Resistance Primary coil
Secondary coil
Air gap (at flywheel)
0.8-1.0Ω
5.9-7.1kΩ
0.4±0.2mm
--
--
--
Starter motor
Brush length
Mica depth
11.0mm
1.6mm
6mm
1.1mm

LONCIN G120F Specifications

General

Brand	LONCIN
Model	G120F
Category	Engine
Language	English