Kolpin Powersports 180??, Service Manual

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54
FIG-18. Engine Disassembly
CYLINDER AND PISTON
SERVICE INFORMATION
GENERAL
Camshaft lubrication oil is fed to the cylinder head
through an oil orifice in the cylinder head and engine
case. Before installing the cylinder head be sure the
orifice is not clogged and the gasket, O-ring and dowel
pins are in place.
SPECIFICATION
TORQUE VALUES
Cylinder head bolts
Camshaft holder flange nuts
Tappet adjusting nut
8~12 n-m (0.8~1.2 kg-m)
20~24 n-m (2.0~2.4 kg-m)
9~12 n-m (0.9~1.2 kg-m)
ITEM STANDARD SERVICE LIMIT
Cylinder I.D.
52,400-52,410/
61,730-61,740
52.50/
61.830
Taper ---------- 0.10
Out of round ---------- 0.10
Warp across top ---------- 0.10
Piston Piston O.D.
52,370-52,390
61,700-61,720
52,3/
61,63
Piston pin Piston pin bore 15.002-15.008 15.04
Piston rings Piston pin O.D. 14.994-15.000 14.960
Piston-to-pin clearance 0.002-0.014 0.02
Piston ring TOP 0.015-0.050 0.12
SECOND 0.015-0.050 0.12
Groove Clearance TOP/SEC 0.10-0.25 0.5
Piston ring end gap OIL 0.2-0.7 ----------
Cylinder-to-piston clearance 0.0005-0.1025 0.1
Connecting rod small end I.D. 15.010-15.028 15.06