LONCIN LC3000i - Section 2 Maintenance Standard; Engine Maintenance Standard

SECTION 2 MAINTENANCE STANDARD
2-1 Engine Maintenance Standard
Unspecified unit：mm
Part Item
LC165F-4
Standard Service limit
Engine Maximum speed
3850±150rpm
－
Cylinder Cylinder bore 65.0 65.165
Piston
Skirt O.D.
64.985 64.845
Piston-to-cylinder clearance 0.015-0.05 0.12
Piston pin bore ID 13.002 13.048
Piston pin-to-piston pin bore
clearance
0.002-0.014 0.06
Piston pin Outside diameter 13.0 12.954
Piston rings
Ring side clearance (Top/Second) 0.015-0.045 0.15
Ring end gap (Top/Second) 0.2-0.4 1.0
Ring end gap (Oil ring) 0.15-0.35 1.0
Ring height (Top/Second) 1.0 0.9
Ring height (Oil ring) 2.5 2.37
Ring width (Top) 2.3-2.5 2.27
Ring width (Second) 2.5-2.7 2.44
Ring width (Oil ring) 2.43-2.83 2.37
Connecting rod
Small end I.D. 13.005 13.07
Big end I.D. 25.02 25.066
Big end oil clearance
0.04-0.063 0.12
Big end side clearance 0.1-0.7 1.1
Crankshaft Crankpin O.D. 24.98 24.92
Valves
Clearance(cold) (IN) 0.10~0.15
－
Clearance(cold) (EX) 0.10~0.15
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Stem O.D. (IN) 5.48 5.318
Stem O.D. (EX) 5.44 5.275
Valve guide
I.D. (IN,EX) 5.50 5.572
Stem-to-guide clearance (IN) 0.02-0.044 0.10
Stem-to-guide clearance (EX) 0.06-0.087 0.12
Valve seat Seat width 0.8 2.0
Valve spring Free length 30.5 29.5
Camshaft
Cam height (IN) 27.7 27.45
Cam height (EX) 27.75 27.50
O.D. (bearing section) 13.984 13.916
Crankcase cover Camshaft holder I.D. 14.0 14.048
Spark plug Gap 0.7-0.8
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Ignition coil Resistance Primary coil 0.8-1.0Ω
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